diff --git a/.idea/runConfigurations/tests.xml b/.idea/runConfigurations/tests.xml
index ceb308e..a2d3df1 100644
--- a/.idea/runConfigurations/tests.xml
+++ b/.idea/runConfigurations/tests.xml
@@ -2,6 +2,12 @@
   <configuration default="false" name="tests" type="JUnit" factoryName="JUnit" singleton="false">
     <module name="postgres-json.test" />
     <useClassPathOnly />
+    <extension name="coverage">
+      <pattern>
+        <option name="PATTERN" value="fr.postgresjson.*" />
+        <option name="ENABLED" value="true" />
+      </pattern>
+    </extension>
     <extension name="net.ashald.envfile">
       <option name="IS_ENABLED" value="false" />
       <option name="IS_SUBST" value="false" />
diff --git a/build.gradle.kts b/build.gradle.kts
index f483389..09ee113 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,4 +1,6 @@
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+val containerAlwaysOn: String by project
+val disableLint: String by project
 
 plugins {
     jacoco
@@ -9,7 +11,7 @@ plugins {
     id("org.jlleitschuh.gradle.ktlint") version "10.0.0"
     id("org.owasp.dependencycheck") version "6.1.1"
     id("fr.coppernic.versioning") version "3.2.1"
-    id("com.avast.gradle.docker-compose") version "0.14.0"
+    id("com.avast.gradle.docker-compose") version "0.14.4"
     id("org.sonarqube") version "+"
 }
 
@@ -42,7 +44,9 @@ tasks.test {
     useJUnit()
     useJUnitPlatform()
     systemProperty("junit.jupiter.execution.parallel.enabled", true)
-    finalizedBy(tasks.ktlintCheck)
+    if (disableLint.toBoolean() == false) {
+        finalizedBy(tasks.ktlintCheck)
+    }
 }
 
 tasks.jacocoTestReport {
@@ -86,7 +90,7 @@ apply(plugin = "docker-compose")
 dockerCompose {
     projectName = "postgres-json"
     useComposeFiles = listOf("docker-compose.yml")
-    stopContainers = true
+    stopContainers = !containerAlwaysOn.toBoolean()
     isRequiredBy(project.tasks.test)
 }
 
diff --git a/docs/usage/stored-procedure.md b/docs/usage/stored-procedure.md
index a5a95b1..02a567e 100644
--- a/docs/usage/stored-procedure.md
+++ b/docs/usage/stored-procedure.md
@@ -12,7 +12,7 @@ import fr.postgresjson.connexion.Connection
 
 val connection: Connection = TODO()
 
-val requester = Requester.RequesterFactory(
+val requester = Requester(
     connection = connection,
     functionsDirectory = this::class.java.getResource("/sql/functions")?.toURI() ?: error("No sql function found")
 ).createRequester()
@@ -42,7 +42,7 @@ class UserForCreate(
 ): Serializable
 ```
 3. and, define Repositories
-*[See SQL function](./migrations.md#Stored procedure migrations)*
+[See SQL function](../migrations/migrations.md)
 
 ```kotlin
 import fr.postgresjson.connexion.Requester
diff --git a/gradle.properties b/gradle.properties
index d1c3969..00a8cd7 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -6,4 +6,6 @@ systemProp.sonar.projectName=PostgresJson
 systemProp.sonar.organization=flecomte
 systemProp.sonar.java.coveragePlugin=jacoco
 systemProp.sonar.coverage.jacoco.xmlReportPaths=build/reports/jacoco/test/jacocoTestReport.xml
-org.gradle.jvmargs=-Xmx4096M
\ No newline at end of file
+org.gradle.jvmargs=-Xmx4096M
+containerAlwaysOn=false
+disableLint=false
\ No newline at end of file
diff --git a/src/main/kotlin/fr/postgresjson/connexion/Connection.kt b/src/main/kotlin/fr/postgresjson/connexion/Connection.kt
index a09ec1e..9fcd2d6 100644
--- a/src/main/kotlin/fr/postgresjson/connexion/Connection.kt
+++ b/src/main/kotlin/fr/postgresjson/connexion/Connection.kt
@@ -1,8 +1,9 @@
 package fr.postgresjson.connexion
 
 import com.fasterxml.jackson.core.type.TypeReference
-import com.github.jasync.sql.db.Connection
 import com.github.jasync.sql.db.QueryResult
+import com.github.jasync.sql.db.ResultSet
+import com.github.jasync.sql.db.general.ArrayRowData
 import com.github.jasync.sql.db.pool.ConnectionPool
 import com.github.jasync.sql.db.postgresql.PostgreSQLConnection
 import com.github.jasync.sql.db.postgresql.PostgreSQLConnectionBuilder
@@ -12,7 +13,7 @@ import fr.postgresjson.entity.Serializable
 import fr.postgresjson.serializer.Serializer
 import fr.postgresjson.utils.LoggerDelegate
 import org.slf4j.Logger
-import java.util.concurrent.CompletableFuture
+import kotlin.random.Random
 
 typealias SelectOneCallback<T> = QueryResult.(T?) -> Unit
 typealias SelectCallback<T> = QueryResult.(List<T>) -> Unit
@@ -44,67 +45,65 @@ class Connection(
     }
 
     fun disconnect() {
-        connection?.run { disconnect() }
+        connection?.disconnect()
     }
 
-    fun <A> inTransaction(f: (Connection) -> CompletableFuture<A>) = connect().inTransaction(f)
+    fun <A> inTransaction(block: Connection.() -> A?): A? = connect().run {
+        sendQuery("BEGIN")
+        try {
+            block().apply { sendQuery("COMMIT") }
+        } catch (e: Throwable) {
+            sendQuery("ROLLBACK")
+            throw e
+        }
+    }
 
-    override fun <R : EntityI> select(
+    /**
+     * Select One [EntityI] with [List] of parameters
+     */
+    override fun <R : EntityI> selectOne(
         sql: String,
         typeReference: TypeReference<R>,
         values: List<Any?>,
         block: (QueryResult, R?) -> Unit
     ): R? {
-        val primaryObject = values.firstOrNull {
-            it is EntityI && typeReference.type.typeName == it::class.java.name
-        } as R?
         val result = exec(sql, compileArgs(values))
         val json = result.rows.firstOrNull()?.getString(0)
         return if (json === null) {
             null
         } else {
-            if (primaryObject != null) {
-                serializer.deserialize(json, primaryObject)
-            } else {
-                serializer.deserialize(json, typeReference)
-            }
+            serializer.deserialize(json, typeReference)
         }.also {
             block(result, it)
         }
     }
 
-    inline fun <reified R : EntityI> selectOne(
-        sql: String,
-        values: List<Any?> = emptyList(),
-        noinline block: SelectOneCallback<R> = {}
-    ): R? =
-        select(sql, object : TypeReference<R>() {}, values, block)
-
-    override fun <R : EntityI> select(
+    /**
+     * Select One [EntityI] with named parameters
+     */
+    override fun <R : EntityI> selectOne(
         sql: String,
         typeReference: TypeReference<R>,
         values: Map<String, Any?>,
         block: (QueryResult, R?) -> Unit
     ): R? {
         return replaceArgs(sql, values) {
-            select(this.sql, typeReference, this.parameters, block)
+            selectOne(this.sql, typeReference, parameters, block)
         }
     }
 
-    inline fun <reified R : EntityI> selectOne(
-        sql: String,
-        values: Map<String, Any?>,
-        noinline block: SelectOneCallback<R> = {}
-    ): R? =
-        select(sql, object : TypeReference<R>() {}, values, block)
+    /* Select Multiples */
 
+    /**
+     * Select multiple [EntityI] with [List] of parameters
+     */
     override fun <R : EntityI> select(
         sql: String,
         typeReference: TypeReference<List<R>>,
         values: List<Any?>,
-        block: (QueryResult, List<R>) -> Unit
+        block: QueryResult.(List<R>) -> Unit
     ): List<R> {
-        val result = exec(sql, compileArgs(values))
+        val result = exec(sql, values)
         val json = result.rows[0].getString(0)
         return if (json === null) {
             listOf<EntityI>() as List<R>
@@ -115,20 +114,32 @@ class Connection(
         }
     }
 
-    inline fun <reified R : EntityI> select(
+    /**
+     * Select multiple [EntityI] with [Map] of parameters
+     */
+    override fun <R : EntityI> select(
         sql: String,
-        values: List<Any?> = emptyList(),
-        noinline block: SelectCallback<R> = {}
-    ): List<R> =
-        select(sql, object : TypeReference<List<R>>() {}, values, block)
+        typeReference: TypeReference<List<R>>,
+        values: Map<String, Any?>,
+        block: QueryResult.(List<R>) -> Unit
+    ): List<R> {
+        return replaceArgs(sql, values) {
+            select(this.sql, typeReference, this.parameters, block)
+        }
+    }
 
+    /* Select Paginated */
+
+    /**
+     * Select Multiple [EntityI] with pagination
+     */
     override fun <R : EntityI> select(
         sql: String,
         page: Int,
         limit: Int,
         typeReference: TypeReference<List<R>>,
         values: Map<String, Any?>,
-        block: (QueryResult, Paginated<R>) -> Unit
+        block: QueryResult.(Paginated<R>) -> Unit
     ): Paginated<R> {
         val offset = (page - 1) * limit
         val newValues = values
@@ -140,8 +151,15 @@ class Connection(
         }
 
         return line.run {
-            val json = rows[0].getString(0)
-            val entities = if (json === null) {
+            val firstLine = rows.firstOrNull() ?: queryError("The query has no return", sql, newValues)
+            if (!(firstLine as ArrayRowData).mapping.keys.contains("total")) queryError("""The query not return the "total" column""", sql, newValues, rows)
+            val total = try {
+                firstLine.getInt("total") ?: queryError("The query return \"total\" must not be null", sql, newValues, rows)
+            } catch (e: ClassCastException) {
+                queryError("""Column "total" must be an integer""", sql, newValues, rows)
+            }
+            val json = firstLine.getString(0)
+            val entities = if (json == null) {
                 listOf<EntityI>() as List<R>
             } else {
                 serializer.deserializeList(json, typeReference)
@@ -150,44 +168,17 @@ class Connection(
                 entities,
                 offset,
                 limit,
-                rows[0].getInt("total") ?: error("The query not return total")
+                total
             )
         }.also {
             block(line, it)
         }
     }
 
-    inline fun <reified R : EntityI> select(
-        sql: String,
-        page: Int,
-        limit: Int,
-        values: Map<String, Any?> = emptyMap(),
-        noinline block: SelectPaginatedCallback<R> = {}
-    ): Paginated<R> =
-        select(sql, page, limit, object : TypeReference<List<R>>() {}, values, block)
-
-    override fun <R : EntityI> select(
-        sql: String,
-        typeReference: TypeReference<List<R>>,
-        values: Map<String, Any?>,
-        block: (QueryResult, List<R>) -> Unit
-    ): List<R> {
-        return replaceArgs(sql, values) {
-            select(this.sql, typeReference, this.parameters, block)
-        }
-    }
-
-    inline fun <reified R : EntityI> select(
-        sql: String,
-        values: Map<String, Any?>,
-        noinline block: SelectCallback<R> = {}
-    ): List<R> =
-        select(sql, object : TypeReference<List<R>>() {}, values, block)
-
     override fun exec(sql: String, values: List<Any?>): QueryResult {
         val compiledValues = compileArgs(values)
         return stopwatchQuery(sql, compiledValues) {
-            connect().sendPreparedStatement(sql, compiledValues).join()
+            connect().sendPreparedStatement(replaceNamedArgByQuestionMark(sql), compiledValues).join()
         }
     }
 
@@ -197,16 +188,22 @@ class Connection(
         }
     }
 
-    override fun sendQuery(sql: String, values: List<Any?>): Int {
+    /**
+     * Warning: this method not use prepared statement
+     */
+    override fun sendQuery(sql: String, values: List<Any?>): QueryResult {
         val compiledValues = compileArgs(values)
         return stopwatchQuery(sql, compiledValues) {
             replaceArgsIntoSql(sql, compiledValues) {
-                connect().sendQuery(it).join().rowsAffected.toInt()
+                connect().sendQuery(it).join()
             }
         }
     }
 
-    override fun sendQuery(sql: String, values: Map<String, Any?>): Int {
+    /**
+     * Warning: this method not use prepared statement
+     */
+    override fun sendQuery(sql: String, values: Map<String, Any?>): QueryResult {
         return replaceArgs(sql, values) {
             sendQuery(this.sql, this.parameters)
         }
@@ -224,35 +221,63 @@ class Connection(
 
     private fun <T> replaceArgs(sql: String, values: Map<String, Any?>, block: ParametersQuery.() -> T): T {
         val paramRegex = "(?<!:):([a-zA-Z0-9_-]+)".toRegex(RegexOption.IGNORE_CASE)
-        val newArgs = paramRegex.findAll(sql).map { match ->
+        val orderedArgs = paramRegex.findAll(sql).map { match ->
             val name = match.groups[1]!!.value
-            values[name] ?: values[name.trimStart('_')] ?: error("Parameter $name missing")
+            values[name] ?: values[name.trimStart('_')] ?: queryError("""Parameter "$name" missing""", sql, values)
         }.toList()
 
-        var newSql = sql
-        values.forEach { (key, _) ->
-            val regex = ":_?$key".toRegex()
-            newSql = newSql.replace(regex, "?")
-        }
+        return block(ParametersQuery(replaceNamedArgByQuestionMark(sql), orderedArgs))
+    }
 
-        return block(ParametersQuery(newSql, newArgs))
+    private fun replaceNamedArgByQuestionMark(sql: String): String =
+        "(?<!:):([a-zA-Z0-9_-]+)"
+            .toRegex(RegexOption.IGNORE_CASE)
+            .replace(sql, "?")
+
+    private fun insertArgsValuesIntoSql(sql: String, values: List<Any?>): String {
+        var i = 0
+
+        /* The regular expression matches a question mark "?" alone, not preceded or followed by another question mark */
+        return """(?<!\?)(\?)(?!\?)"""
+            .toRegex(RegexOption.IGNORE_CASE)
+            .replace(sql) {
+                values.getOrNull(i)
+                    ?.toString()
+                    ?.also { ++i }
+                    ?.let(this::escapeParameter)
+                    ?: queryError("Parameter $i missing", sql, values)
+            }
     }
 
     private fun <T> replaceArgsIntoSql(sql: String, values: List<Any?>, block: (String) -> T): T {
-        val paramRegex = "(?<!\\?)(\\?)(?!\\?)".toRegex(RegexOption.IGNORE_CASE)
-        var i = 0
-        if (values.isNotEmpty()) {
-            val newSql = paramRegex.replace(sql) {
-                values[i] ?: error("Parameter $i missing")
-                val valToReplace = values[i].toString()
-                ++i
-                "'$valToReplace'"
-            }
+        return if (values.isNotEmpty()) {
+            sql
+                .let(this::replaceNamedArgByQuestionMark)
+                .let { insertArgsValuesIntoSql(it, values) }
+                .let(block)
+        } else block(sql)
+    }
 
-            return block(newSql)
+    /**
+     * Escape parameter by generate a random tag to prevent SQL injection
+     */
+    private fun escapeParameter(parameter: String): String {
+        val escapeTag = escapeTag().let {
+            if (parameter.indexOf(it) >= 0) escapeParameter(parameter) else it
         }
+        return """$escapeTag$parameter$escapeTag"""
+    }
 
-        return block(sql)
+    /**
+     * Generate a random alphaNum tag of 8 characters
+     */
+    private fun escapeTag(): String {
+        val charPool: List<Char> = ('a'..'z') + ('A'..'Z')
+        val tagName = (1..8)
+            .map { _ -> Random.nextInt(0, charPool.size) }
+            .map(charPool::get)
+            .joinToString("")
+        return "\$$tagName\$"
     }
 
     data class ParametersQuery(val sql: String, val parameters: List<Any?>)
@@ -291,4 +316,40 @@ class Connection(
             throw e
         }
     }
+
+    class QueryError(msg: String) : Exception(msg)
+
+    private fun queryError(
+        msg: String,
+        sql: String,
+        parameters: List<Any?>,
+        result: ResultSet? = null
+    ): Nothing = throw QueryError(
+        """
+        |$msg
+        |
+        |${parameters.joinToString(", ") { it.toString() }.prependIndent("  > ") ?: ""}
+        |${sql.prependIndent("  > ")}
+        |${result?.let { "-----" }?.prependIndent("  > ") ?: ""}
+        |${result?.columnNames()?.joinToString(" | ")?.prependIndent("  > ") ?: ""}
+        |${result?.map { it.joinToString(" | ") }?.joinToString("\n")?.prependIndent("  > ") ?: ""}
+        """.trimMargin().trim(' ', '\n')
+    )
+
+    private fun queryError(
+        msg: String,
+        sql: String,
+        parameters: Map<String, Any?>,
+        result: ResultSet? = null
+    ): Nothing = throw QueryError(
+        """
+        |$msg
+        |
+        |${parameters.map { ":" + it.key + " = " + it.value }.joinToString(", ").prependIndent("  > ") ?: ""}
+        |${sql.prependIndent("  > ")}
+        |${result?.let { "-----" }?.prependIndent("  > ") ?: ""}
+        |${result?.columnNames()?.joinToString(" | ")?.prependIndent("  > ") ?: ""}
+        |${result?.map { it.joinToString(" | ") }?.joinToString("\n")?.prependIndent("  > ") ?: ""}
+        """.trimMargin().trim(' ', '\n')
+    )
 }
diff --git a/src/main/kotlin/fr/postgresjson/connexion/EmbedExecutable.kt b/src/main/kotlin/fr/postgresjson/connexion/EmbedExecutable.kt
index cf8355b..d77677c 100644
--- a/src/main/kotlin/fr/postgresjson/connexion/EmbedExecutable.kt
+++ b/src/main/kotlin/fr/postgresjson/connexion/EmbedExecutable.kt
@@ -4,41 +4,86 @@ import com.fasterxml.jackson.core.type.TypeReference
 import com.github.jasync.sql.db.QueryResult
 import fr.postgresjson.entity.EntityI
 
-interface EmbedExecutable {
+sealed interface EmbedExecutable {
     val connection: Connection
     override fun toString(): String
     val name: String
 
     /* Select One */
+
     /**
-     * Select One entity with list of parameters
+     * Update [EntityI] with one entity as argument
      */
-    fun <R : EntityI> select(
+    fun <R : EntityI> update(
         typeReference: TypeReference<R>,
-        values: List<Any?> = emptyList(),
+        value: R,
+        block: SelectOneCallback<R> = {}
+    ): R? =
+        selectOne(typeReference, listOf(value), block)
+
+    /**
+     * Select One [EntityI] with [List] of parameters
+     */
+    fun <R : EntityI> selectOne(
+        typeReference: TypeReference<R>,
+        values: List<Any?>,
         block: SelectOneCallback<R> = {}
     ): R?
 
-    fun <R : EntityI> select(
+    /**
+     * Select One [EntityI] with [Map] of parameters
+     */
+    fun <R : EntityI> selectOne(
         typeReference: TypeReference<R>,
         values: Map<String, Any?>,
         block: SelectOneCallback<R> = {}
     ): R?
 
+    /**
+     * Select One [EntityI] with multiple [Pair] of parameters
+     */
+    fun <R : EntityI> selectOne(
+        typeReference: TypeReference<R>,
+        vararg values: Pair<String, Any?>,
+        block: SelectOneCallback<R> = {}
+    ): R? =
+        selectOne(typeReference, values.toMap(), block)
+
     /* Select Multiples */
+
+    /**
+     * Select Multiple [EntityI] with [List] of parameters
+     */
     fun <R : EntityI> select(
         typeReference: TypeReference<List<R>>,
-        values: List<Any?> = emptyList(),
+        values: List<Any?>,
         block: SelectCallback<R> = {}
     ): List<R>
 
+    /**
+     * Select Multiple [EntityI] with [Map] of parameters
+     */
     fun <R : EntityI> select(
         typeReference: TypeReference<List<R>>,
         values: Map<String, Any?>,
         block: SelectCallback<R> = {}
     ): List<R>
 
+    /**
+     * Select Multiple [EntityI] with multiple [Pair] of parameters
+     */
+    fun <R : EntityI> select(
+        typeReference: TypeReference<List<R>>,
+        vararg values: Pair<String, Any?>,
+        block: SelectCallback<R> = {}
+    ): List<R> =
+        select(typeReference, values.toMap(), block)
+
     /* Select Paginated */
+
+    /**
+     * Select Paginated [EntityI] with [Map] of parameters
+     */
     fun <R : EntityI> select(
         page: Int,
         limit: Int,
@@ -47,16 +92,19 @@ interface EmbedExecutable {
         block: SelectPaginatedCallback<R> = {}
     ): Paginated<R>
 
-    fun exec(values: List<Any?> = emptyList()): QueryResult
+    /**
+     * Select Paginated [EntityI] with multiple [Pair] of parameters
+     */
+    fun <R : EntityI> select(
+        page: Int,
+        limit: Int,
+        typeReference: TypeReference<List<R>>,
+        vararg values: Pair<String, Any?>,
+        block: SelectPaginatedCallback<R> = {}
+    ): Paginated<R> =
+        select(page, limit, typeReference, values.toMap(), block)
+
+    fun exec(values: List<Any?>): QueryResult
     fun exec(values: Map<String, Any?>): QueryResult
     fun exec(vararg values: Pair<String, Any?>): QueryResult = exec(values.toMap())
-
-    fun perform(values: List<Any?>) { exec(values) }
-    fun perform(values: Map<String, Any?>) { exec(values) }
-    fun perform(vararg values: Pair<String, Any?>) = perform(values.toMap())
-
-    fun sendQuery(values: List<Any?> = emptyList()): Int
-    fun sendQuery(values: Map<String, Any?>): Int
-    fun sendQuery(vararg values: Pair<String, Any?>): Int =
-        sendQuery(values.toMap())
 }
diff --git a/src/main/kotlin/fr/postgresjson/connexion/EmbedExecutableReified.kt b/src/main/kotlin/fr/postgresjson/connexion/EmbedExecutableReified.kt
new file mode 100644
index 0000000..73e4df4
--- /dev/null
+++ b/src/main/kotlin/fr/postgresjson/connexion/EmbedExecutableReified.kt
@@ -0,0 +1,68 @@
+package fr.postgresjson.connexion
+
+import com.fasterxml.jackson.core.type.TypeReference
+import fr.postgresjson.entity.EntityI
+
+/* Select One */
+
+inline fun <reified R : EntityI> EmbedExecutable.update(
+    value: R,
+    noinline block: SelectOneCallback<R> = {}
+): R? =
+    update(object : TypeReference<R>() {}, value, block)
+
+inline fun <reified R : EntityI> EmbedExecutable.selectOne(
+    values: List<Any?>,
+    noinline block: SelectOneCallback<R> = {}
+): R? =
+    selectOne(object : TypeReference<R>() {}, values, block)
+
+inline fun <reified R : EntityI> EmbedExecutable.selectOne(
+    values: Map<String, Any?>,
+    noinline block: SelectOneCallback<R> = {}
+): R? =
+    selectOne(object : TypeReference<R>() {}, values, block)
+
+inline fun <reified R : EntityI> EmbedExecutable.selectOne(
+    vararg values: Pair<String, Any?>,
+    noinline block: SelectOneCallback<R> = {}
+): R? =
+    selectOne(object : TypeReference<R>() {}, values = values, block)
+
+/* Select Multiples */
+
+inline fun <reified R : EntityI> EmbedExecutable.select(
+    values: List<Any?>,
+    noinline block: SelectCallback<R> = {}
+): List<R> =
+    select(object : TypeReference<List<R>>() {}, values, block)
+
+inline fun <reified R : EntityI> EmbedExecutable.select(
+    values: Map<String, Any?>,
+    noinline block: SelectCallback<R> = {}
+): List<R> =
+    select(object : TypeReference<List<R>>() {}, values, block)
+
+inline fun <reified R : EntityI> EmbedExecutable.select(
+    vararg values: Pair<String, Any?>,
+    noinline block: SelectCallback<R> = {}
+): List<R> =
+    select(object : TypeReference<List<R>>() {}, values = values, block)
+
+/* Select Paginated */
+
+inline fun <reified R : EntityI> EmbedExecutable.select(
+    page: Int,
+    limit: Int,
+    values: Map<String, Any?> = emptyMap(),
+    noinline block: SelectPaginatedCallback<R> = {}
+): Paginated<R> =
+    select(page, limit, object : TypeReference<List<R>>() {}, values, block)
+
+inline fun <reified R : EntityI> EmbedExecutable.select(
+    page: Int,
+    limit: Int,
+    vararg values: Pair<String, Any?>,
+    noinline block: SelectPaginatedCallback<R> = {}
+): Paginated<R> =
+    select(page, limit, object : TypeReference<List<R>>() {}, values = values, block)
diff --git a/src/main/kotlin/fr/postgresjson/connexion/Executable.kt b/src/main/kotlin/fr/postgresjson/connexion/Executable.kt
index 5055063..d4be1a5 100644
--- a/src/main/kotlin/fr/postgresjson/connexion/Executable.kt
+++ b/src/main/kotlin/fr/postgresjson/connexion/Executable.kt
@@ -5,24 +5,58 @@ import com.github.jasync.sql.db.QueryResult
 import fr.postgresjson.entity.EntityI
 
 interface Executable {
+
+    /* Update */
+
+    /**
+     * Update [EntityI] with one entity as argument
+     */
+    fun <R : EntityI> update(
+        sql: String,
+        typeReference: TypeReference<R>,
+        value: R,
+        block: SelectOneCallback<R> = {}
+    ): R? =
+        selectOne(sql, typeReference, listOf(value), block)
+
     /* Select One */
 
-    fun <R : EntityI> select(
+    /**
+     * Select One [EntityI] with [List] of parameters
+     */
+    fun <R : EntityI> selectOne(
         sql: String,
         typeReference: TypeReference<R>,
-        values: List<Any?> = emptyList(),
+        values: List<Any?>,
         block: SelectOneCallback<R> = {}
     ): R?
 
-    fun <R : EntityI> select(
+    /**
+     * Select One [EntityI] with [Map] of parameters
+     */
+    fun <R : EntityI> selectOne(
         sql: String,
         typeReference: TypeReference<R>,
         values: Map<String, Any?>,
         block: SelectOneCallback<R> = {}
     ): R?
 
-    /* Select Miltiples */
+    /**
+     * Select One [EntityI] with multiple [Pair] of parameters
+     */
+    fun <R : EntityI> selectOne(
+        sql: String,
+        typeReference: TypeReference<R>,
+        vararg values: Pair<String, Any?>,
+        block: SelectOneCallback<R> = {}
+    ): R? =
+        selectOne(sql, typeReference, values.toMap(), block)
 
+    /* Select Multiples */
+
+    /**
+     * Select Multiple [EntityI] with [List] of parameters
+     */
     fun <R : EntityI> select(
         sql: String,
         typeReference: TypeReference<List<R>>,
@@ -30,6 +64,9 @@ interface Executable {
         block: SelectCallback<R> = {}
     ): List<R>
 
+    /**
+     * Select Multiple [EntityI] with [Map] of parameters
+     */
     fun <R : EntityI> select(
         sql: String,
         typeReference: TypeReference<List<R>>,
@@ -37,8 +74,22 @@ interface Executable {
         block: SelectCallback<R> = {}
     ): List<R>
 
+    /**
+     * Select Multiple [EntityI] with multiple [Pair] of parameters
+     */
+    fun <R : EntityI> select(
+        sql: String,
+        typeReference: TypeReference<List<R>>,
+        vararg values: Pair<String, Any?>,
+        block: SelectCallback<R> = {}
+    ): List<R> =
+        select(sql, typeReference, values.toMap(), block)
+
     /* Select Paginated */
 
+    /**
+     * Select Paginated [EntityI] with [Map] of parameters
+     */
     fun <R : EntityI> select(
         sql: String,
         page: Int,
@@ -48,8 +99,38 @@ interface Executable {
         block: SelectPaginatedCallback<R> = {}
     ): Paginated<R>
 
-    fun exec(sql: String, values: List<Any?> = emptyList()): QueryResult
+    /**
+     * Select Paginated [EntityI] with multiple [Pair] of parameters
+     */
+    fun <R : EntityI> select(
+        sql: String,
+        page: Int,
+        limit: Int,
+        typeReference: TypeReference<List<R>>,
+        vararg values: Pair<String, Any?>,
+        block: SelectPaginatedCallback<R> = {}
+    ): Paginated<R> =
+        select(sql, page, limit, typeReference, values.toMap(), block)
+
+    fun <R : EntityI> exec(sql: String, value: R): QueryResult = exec(sql, listOf(value))
+    fun exec(sql: String, values: List<Any?>): QueryResult
     fun exec(sql: String, values: Map<String, Any?>): QueryResult
-    fun sendQuery(sql: String, values: List<Any?> = emptyList()): Int
-    fun sendQuery(sql: String, values: Map<String, Any?>): Int
+    fun exec(sql: String, vararg values: Pair<String, Any?>): QueryResult = exec(sql, values.toMap())
+
+    /**
+     * Warning: this method not use prepared statement
+     */
+    fun <R : EntityI> sendQuery(sql: String, value: R): QueryResult = sendQuery(sql, listOf(value))
+    /**
+     * Warning: this method not use prepared statement
+     */
+    fun sendQuery(sql: String, values: List<Any?>): QueryResult
+    /**
+     * Warning: this method not use prepared statement
+     */
+    fun sendQuery(sql: String, values: Map<String, Any?>): QueryResult
+    /**
+     * Warning: this method not use prepared statement
+     */
+    fun sendQuery(sql: String, vararg values: Pair<String, Any?>): QueryResult = sendQuery(sql, values.toMap())
 }
diff --git a/src/main/kotlin/fr/postgresjson/connexion/ExecutableReified.kt b/src/main/kotlin/fr/postgresjson/connexion/ExecutableReified.kt
new file mode 100644
index 0000000..25686e1
--- /dev/null
+++ b/src/main/kotlin/fr/postgresjson/connexion/ExecutableReified.kt
@@ -0,0 +1,106 @@
+package fr.postgresjson.connexion
+
+import com.fasterxml.jackson.core.type.TypeReference
+import fr.postgresjson.entity.EntityI
+
+/* Update */
+
+/**
+ * Update [EntityI] with one entity as argument
+ */
+inline fun <reified R : EntityI> Executable.update(
+    sql: String,
+    value: R,
+    noinline block: SelectOneCallback<R> = {}
+): R? =
+    update(sql, object : TypeReference<R>() {}, value, block)
+
+/* Select One */
+
+/**
+ * Select One [EntityI] with [List] of parameters
+ */
+inline fun <reified R : EntityI> Executable.selectOne(
+    sql: String,
+    values: List<Any?> = emptyList(),
+    noinline block: SelectOneCallback<R> = {}
+): R? =
+    selectOne(sql, object : TypeReference<R>() {}, values, block)
+
+/**
+ * Select One [EntityI] with [Map] of parameters
+ */
+inline fun <reified R : EntityI> Executable.selectOne(
+    sql: String,
+    values: Map<String, Any?>,
+    noinline block: SelectOneCallback<R> = {}
+): R? =
+    selectOne(sql, object : TypeReference<R>() {}, values, block)
+
+/**
+ * Select One [EntityI] with multiple [Pair] of parameters
+ */
+inline fun <reified R : EntityI> Executable.selectOne(
+    sql: String,
+    vararg values: Pair<String, Any?>,
+    noinline block: SelectOneCallback<R> = {}
+): R? =
+    selectOne(sql, object : TypeReference<R>() {}, values = values, block)
+
+/* Select Multiples */
+
+/**
+ * Select Multiple [EntityI] with [List] of parameters
+ */
+inline fun <reified R : EntityI> Executable.select(
+    sql: String,
+    values: List<Any?> = emptyList(),
+    noinline block: SelectCallback<R> = {}
+): List<R> =
+    select(sql, object : TypeReference<List<R>>() {}, values, block)
+
+/**
+ * Select Multiple [EntityI] with [Map] of parameters
+ */
+inline fun <reified R : EntityI> Executable.select(
+    sql: String,
+    values: Map<String, Any?>,
+    noinline block: SelectCallback<R> = {}
+): List<R> =
+    select(sql, object : TypeReference<List<R>>() {}, values, block)
+
+/**
+ * Select Multiple [EntityI] with multiple [Pair] of parameters
+ */
+inline fun <reified R : EntityI> Executable.select(
+    sql: String,
+    vararg values: Pair<String, Any?>,
+    noinline block: SelectCallback<R> = {}
+): List<R> =
+    select(sql, object : TypeReference<List<R>>() {}, values = values, block)
+
+/* Select Paginated */
+
+/**
+ * Select Paginated [EntityI] with [Map] of parameters
+ */
+inline fun <reified R : EntityI> Executable.select(
+    sql: String,
+    page: Int,
+    limit: Int,
+    values: Map<String, Any?> = emptyMap(),
+    noinline block: SelectPaginatedCallback<R> = {}
+): Paginated<R> =
+    select(sql, page, limit, object : TypeReference<List<R>>() {}, values, block)
+
+/**
+ * Select Paginated [EntityI] with multiple [Pair] of parameters
+ */
+inline fun <reified R : EntityI> Executable.select(
+    sql: String,
+    page: Int,
+    limit: Int,
+    vararg values: Pair<String, Any?>,
+    noinline block: SelectPaginatedCallback<R> = {}
+): Paginated<R> =
+    select(sql, page, limit, object : TypeReference<List<R>>() {}, values = values, block)
diff --git a/src/main/kotlin/fr/postgresjson/connexion/Function.kt b/src/main/kotlin/fr/postgresjson/connexion/Function.kt
index 824f0cb..83096f6 100644
--- a/src/main/kotlin/fr/postgresjson/connexion/Function.kt
+++ b/src/main/kotlin/fr/postgresjson/connexion/Function.kt
@@ -15,109 +15,51 @@ class Function(val definition: Function, override val connection: Connection) :
     /* Select One */
 
     /**
-     * Select One entity with list of parameters
+     * Select One [EntityI] with [List] of parameters
      */
-    override fun <R : EntityI> select(
+    override fun <R : EntityI> selectOne(
         typeReference: TypeReference<R>,
         values: List<Any?>,
         block: (QueryResult, R?) -> Unit
-    ): R? {
-        val args = compileArgs(values)
-        val sql = "SELECT * FROM ${definition.name} ($args)"
-
-        return connection.select(sql, typeReference, values, block)
-    }
-
-    inline fun <reified R : EntityI> selectOne(
-        values: List<Any?> = emptyList(),
-        noinline block: SelectOneCallback<R> = {}
     ): R? =
-        select(object : TypeReference<R>() {}, values, block)
-
-    inline fun <reified R : EntityI> selectOne(
-        value: R,
-        noinline block: SelectOneCallback<R> = {}
-    ): R? =
-        select(object : TypeReference<R>() {}, listOf(value), block)
+        connection.selectOne(compileSql(values), typeReference, values, block)
 
     /**
-     * Select One entity with named parameters
+     * Select One [EntityI] with named parameters
      */
-    override fun <R : EntityI> select(
+    override fun <R : EntityI> selectOne(
         typeReference: TypeReference<R>,
         values: Map<String, Any?>,
         block: (QueryResult, R?) -> Unit
-    ): R? {
-        val args = compileArgs(values)
-        val sql = "SELECT * FROM ${definition.name} ($args)"
-
-        return connection.select(sql, typeReference, values, block)
-    }
-
-    inline fun <reified R : EntityI> selectOne(
-        values: Map<String, Any?>,
-        noinline block: SelectOneCallback<R> = {}
     ): R? =
-        select(object : TypeReference<R>() {}, values, block)
-
-    inline fun <reified R : EntityI> selectOne(
-        vararg values: Pair<String, Any?>,
-        noinline block: SelectOneCallback<R> = {}
-    ): R? =
-        selectOne(values.toMap(), block)
+        connection.selectOne(compileSql(values), typeReference, values, block)
 
     /* Select Multiples */
 
     /**
-     * Select list of entities with list of parameters
+     * Select multiple [EntityI] with [List] of parameters
      */
     override fun <R : EntityI> select(
         typeReference: TypeReference<List<R>>,
         values: List<Any?>,
         block: (QueryResult, List<R>) -> Unit
-    ): List<R> {
-        val args = compileArgs(values)
-        val sql = "SELECT * FROM ${definition.name} ($args)"
-
-        return connection.select(sql, typeReference, values, block)
-    }
-
-    inline fun <reified R : EntityI> select(
-        values: List<Any?> = emptyList(),
-        noinline block: SelectCallback<R> = {}
     ): List<R> =
-        select(object : TypeReference<List<R>>() {}, values, block)
+        connection.select(compileSql(values), typeReference, values, block)
 
     /**
-     * Select list of entities with named parameters
+     * Select multiple [EntityI] with named parameters
      */
     override fun <R : EntityI> select(
         typeReference: TypeReference<List<R>>,
         values: Map<String, Any?>,
         block: (QueryResult, List<R>) -> Unit
-    ): List<R> {
-        val args = compileArgs(values)
-        val sql = "SELECT * FROM ${definition.name} ($args)"
-
-        return connection.select(sql, typeReference, values, block)
-    }
-
-    inline fun <reified R : EntityI> select(
-        values: Map<String, Any?>,
-        noinline block: SelectCallback<R> = {}
     ): List<R> =
-        select(object : TypeReference<List<R>>() {}, values, block)
-
-    inline fun <reified R : EntityI> select(
-        vararg values: Pair<String, Any?>,
-        noinline block: SelectCallback<R> = {}
-    ): List<R> =
-        select(values.toMap(), block)
+        connection.select(compileSql(values), typeReference, values, block)
 
     /* Select Paginated */
 
     /**
-     * Select Multiple with pagination
+     * Select Multiple [EntityI] with pagination
      */
     override fun <R : EntityI> select(
         page: Int,
@@ -131,53 +73,16 @@ class Function(val definition: Function, override val connection: Connection) :
             .plus("offset" to offset)
             .plus("limit" to limit)
 
-        val args = compileArgs(newValues)
-        val sql = "SELECT * FROM ${definition.name} ($args)"
-
-        return connection.select(sql, page, limit, typeReference, values, block)
+        return connection.select(compileSql(newValues), page, limit, typeReference, values, block)
     }
 
-    inline fun <reified R : EntityI> select(
-        page: Int,
-        limit: Int,
-        values: Map<String, Any?> = emptyMap(),
-        noinline block: SelectPaginatedCallback<R> = {}
-    ): Paginated<R> =
-        select(page, limit, object : TypeReference<List<R>>() {}, values, block)
+    /* Execute function without treatments */
 
-    inline fun <reified R : EntityI> select(
-        page: Int,
-        limit: Int,
-        vararg values: Pair<String, Any?>,
-        noinline block: SelectPaginatedCallback<R> = {}
-    ): Paginated<R> =
-        select(page, limit, object : TypeReference<List<R>>() {}, values.toMap(), block)
+    override fun exec(values: List<Any?>): QueryResult = connection.exec(compileSql(values), values)
 
-    /* Execute function without traitements */
+    override fun exec(values: Map<String, Any?>): QueryResult = connection.exec(compileSql(values), values)
 
-    override fun exec(values: List<Any?>): QueryResult {
-        val args = compileArgs(values)
-        val sql = "SELECT * FROM ${definition.name} ($args)"
-
-        return connection.exec(sql, values)
-    }
-
-    override fun exec(values: Map<String, Any?>): QueryResult {
-        val args = compileArgs(values)
-        val sql = "SELECT * FROM ${definition.name} ($args)"
-
-        return connection.exec(sql, values)
-    }
-
-    override fun sendQuery(values: List<Any?>): Int {
-        exec(values)
-        return 0
-    }
-
-    override fun sendQuery(values: Map<String, Any?>): Int {
-        exec(values)
-        return 0
-    }
+    private fun <R : EntityI> compileArgs(value: R): String = compileArgs(listOf(value))
 
     private fun compileArgs(values: List<Any?>): String {
         val placeholders = values
@@ -205,4 +110,8 @@ class Function(val definition: Function, override val connection: Connection) :
 
         return placeholders.joinToString(separator = ", ")
     }
+
+    private fun <R : EntityI> compileSql(value: R): String = "SELECT * FROM ${definition.name} (${compileArgs(value)})"
+    private fun compileSql(values: List<Any?>): String = "SELECT * FROM ${definition.name} (${compileArgs(values)})"
+    private fun compileSql(values: Map<String, Any?>): String = "SELECT * FROM ${definition.name} (${compileArgs(values)})"
 }
diff --git a/src/main/kotlin/fr/postgresjson/connexion/FunctionConverter.kt b/src/main/kotlin/fr/postgresjson/connexion/FunctionConverter.kt
new file mode 100644
index 0000000..fd48d53
--- /dev/null
+++ b/src/main/kotlin/fr/postgresjson/connexion/FunctionConverter.kt
@@ -0,0 +1,16 @@
+package fr.postgresjson.connexion
+
+import fr.postgresjson.utils.searchSqlFiles
+import java.net.URI
+import fr.postgresjson.definition.Function as DefinitionFunction
+
+fun DefinitionFunction.toRunnable(connection: Connection): Function = Function(this, connection)
+
+fun Sequence<DefinitionFunction>.toRunnable(connection: Connection): Sequence<Function> = map { it.toRunnable(connection) }
+
+fun Sequence<Function>.toMutableMap(): MutableMap<String, Function> = map { it.name to it }.toMap().toMutableMap()
+
+internal fun URI.toFunction(connection: Connection): MutableMap<String, Function> = searchSqlFiles()
+    .filterIsInstance(DefinitionFunction::class.java)
+    .toRunnable(connection)
+    .toMutableMap()
diff --git a/src/main/kotlin/fr/postgresjson/connexion/Query.kt b/src/main/kotlin/fr/postgresjson/connexion/Query.kt
index be9109d..b2851c9 100644
--- a/src/main/kotlin/fr/postgresjson/connexion/Query.kt
+++ b/src/main/kotlin/fr/postgresjson/connexion/Query.kt
@@ -11,99 +11,79 @@ class Query(override val name: String, private val sql: String, override val con
 
     /* Select One */
 
-    override fun <R : EntityI> select(
+    /**
+     * Select One [EntityI] with [List] of parameters
+     */
+    override fun <R : EntityI> selectOne(
         typeReference: TypeReference<R>,
         values: List<Any?>,
-        block: (QueryResult, R?) -> Unit
-    ): R? {
-        return connection.select(this.toString(), typeReference, values, block)
-    }
-
-    inline fun <reified R : EntityI> selectOne(
-        values: List<Any?> = emptyList(),
-        noinline block: SelectOneCallback<R> = {}
+        block: SelectOneCallback<R>
     ): R? =
-        select(object : TypeReference<R>() {}, values, block)
+        connection.selectOne(sql, typeReference, values, block)
 
-    override fun <R : EntityI> select(
+    /**
+     * Select One [EntityI] with named parameters
+     */
+    override fun <R : EntityI> selectOne(
         typeReference: TypeReference<R>,
         values: Map<String, Any?>,
-        block: (QueryResult, R?) -> Unit
-    ): R? {
-        return connection.select(this.toString(), typeReference, values, block)
-    }
-
-    inline fun <reified R : EntityI> selectOne(
-        values: Map<String, Any?>,
-        noinline block: SelectOneCallback<R> = {}
+        block: SelectOneCallback<R>
     ): R? =
-        select(object : TypeReference<R>() {}, values, block)
+        connection.selectOne(sql, typeReference, values, block)
 
     /* Select Multiples */
 
+    /**
+     * Select multiple [EntityI] with [List] of parameters
+     */
     override fun <R : EntityI> select(
         typeReference: TypeReference<List<R>>,
         values: List<Any?>,
-        block: (QueryResult, List<R>) -> Unit
-    ): List<R> {
-        return connection.select(this.toString(), typeReference, values, block)
-    }
-
-    inline fun <reified R : EntityI> select(
-        values: List<Any?> = emptyList(),
-        noinline block: SelectCallback<R> = {}
+        block: SelectCallback<R>
     ): List<R> =
-        select(object : TypeReference<List<R>>() {}, values, block)
+        connection.select(sql, typeReference, values, block)
 
+    /**
+     * Select multiple [EntityI] with [Map] of parameters
+     */
     override fun <R : EntityI> select(
         typeReference: TypeReference<List<R>>,
         values: Map<String, Any?>,
-        block: (QueryResult, List<R>) -> Unit
-    ): List<R> {
-        return connection.select(this.toString(), typeReference, values, block)
-    }
-
-    inline fun <reified R : EntityI> select(
-        values: Map<String, Any?>,
-        noinline block: SelectCallback<R> = {}
+        block: SelectCallback<R>
     ): List<R> =
-        select(object : TypeReference<List<R>>() {}, values, block)
+        connection.select(sql, typeReference, values, block)
 
+    /* Select Paginated */
+
+    /**
+     * Select Multiple [EntityI] with pagination
+     */
     override fun <R : EntityI> select(
         page: Int,
         limit: Int,
         typeReference: TypeReference<List<R>>,
         values: Map<String, Any?>,
         block: (QueryResult, Paginated<R>) -> Unit
-    ): Paginated<R> {
-        return connection.select(this.toString(), page, limit, typeReference, values, block)
-    }
-
-    /* Select Paginated */
-
-    inline fun <reified R : EntityI> select(
-        page: Int,
-        limit: Int,
-        values: Map<String, Any?> = emptyMap(),
-        noinline block: SelectPaginatedCallback<R> = {}
     ): Paginated<R> =
-        select(page, limit, object : TypeReference<List<R>>() {}, values, block)
+        connection.select(sql, page, limit, typeReference, values, block)
 
-    /* Execute function without traitements */
+    /* Execute function without treatments */
 
-    override fun exec(values: List<Any?>): QueryResult {
-        return connection.exec(sql, values)
-    }
+    override fun exec(values: List<Any?>): QueryResult = connection.exec(sql, values)
 
-    override fun exec(values: Map<String, Any?>): QueryResult {
-        return connection.exec(sql, values)
-    }
+    override fun exec(values: Map<String, Any?>): QueryResult = connection.exec(sql, values)
 
-    override fun sendQuery(values: List<Any?>): Int {
-        return connection.sendQuery(sql, values)
-    }
+    /**
+     * Warning: this method not use prepared statement
+     */
+    fun sendQuery(values: List<Any?>): QueryResult = connection.sendQuery(sql, values)
 
-    override fun sendQuery(values: Map<String, Any?>): Int {
-        return connection.sendQuery(sql, values)
-    }
+    /**
+     * Warning: this method not use prepared statement
+     */
+    fun sendQuery(values: Map<String, Any?>): QueryResult = connection.sendQuery(sql, values)
+    /**
+     * Warning: this method not use prepared statement
+     */
+    fun sendQuery(vararg values: Pair<String, Any?>): QueryResult = sendQuery(values.toMap())
 }
diff --git a/src/main/kotlin/fr/postgresjson/connexion/QueryConverter.kt b/src/main/kotlin/fr/postgresjson/connexion/QueryConverter.kt
new file mode 100644
index 0000000..ca975b2
--- /dev/null
+++ b/src/main/kotlin/fr/postgresjson/connexion/QueryConverter.kt
@@ -0,0 +1,16 @@
+package fr.postgresjson.connexion
+
+import fr.postgresjson.utils.searchSqlFiles
+import java.net.URI
+import fr.postgresjson.definition.Query as QueryDefinition
+
+fun QueryDefinition.toRunnable(connection: Connection): Query = Query(name, script, connection)
+
+fun Sequence<QueryDefinition>.toRunnable(connection: Connection): Sequence<Query> = map { it.toRunnable(connection) }
+
+fun Sequence<Query>.toMutableMap(): MutableMap<String, Query> = map { it.name to it }.toMap().toMutableMap()
+
+internal fun URI.toQuery(connection: Connection): MutableMap<String, Query> = searchSqlFiles()
+    .filterIsInstance(QueryDefinition::class.java)
+    .toRunnable(connection)
+    .toMutableMap()
diff --git a/src/main/kotlin/fr/postgresjson/connexion/Requester.kt b/src/main/kotlin/fr/postgresjson/connexion/Requester.kt
index e3d502e..75626a4 100644
--- a/src/main/kotlin/fr/postgresjson/connexion/Requester.kt
+++ b/src/main/kotlin/fr/postgresjson/connexion/Requester.kt
@@ -10,101 +10,59 @@ class Requester(
     private val queries: MutableMap<String, Query> = mutableMapOf(),
     private val functions: MutableMap<String, Function> = mutableMapOf()
 ) {
-    fun addQuery(query: Query): Requester {
+    constructor(connection: Connection) : this(connection, mutableMapOf(), mutableMapOf())
+
+    constructor(
+        connection: Connection,
+        queriesDirectory: URI? = null,
+        functionsDirectory: URI? = null
+    ) : this(
+        connection = connection,
+        queries = queriesDirectory?.toQuery(connection) ?: mutableMapOf(),
+        functions = functionsDirectory?.toFunction(connection) ?: mutableMapOf(),
+    )
+
+    fun addQuery(query: Query) {
         queries[query.name] = query
-        return this
     }
 
-    fun addQuery(query: QueryDefinition): Requester = addQuery(query.name, query.script)
+    fun addQuery(query: QueryDefinition) = addQuery(query.toRunnable(connection))
 
-    fun addQuery(name: String, sql: String): Requester {
+    fun addQuery(name: String, sql: String) {
         addQuery(Query(name, sql, connection))
-        return this
     }
 
-    fun addQuery(queriesDirectory: URI): Requester {
-        queriesDirectory.searchSqlFiles()
-            .forEach {
-                if (it is QueryDefinition) {
-                    addQuery(it)
-                }
-            }
-        return this
+    fun addQuery(queriesDirectory: URI) {
+        queriesDirectory
+            .searchSqlFiles()
+            .filterIsInstance(QueryDefinition::class.java)
+            .forEach(this::addQuery)
     }
 
-    fun getQueries(): List<Query> {
-        return queries.map { it.value }
+    fun getQueries(): List<Query> = queries.map { it.value }
+
+    fun addFunction(definition: DefinitionFunction) {
+        definition
+            .run { toRunnable(connection) }
+            .run { functions[name] = this }
     }
 
-    fun addFunction(definition: DefinitionFunction): Requester {
-        functions[definition.name] = Function(definition, connection)
-        return this
+    fun addFunction(sql: String) {
+        DefinitionFunction(sql)
+            .run { toRunnable(connection) }
+            .run { functions[name] = this }
     }
 
-    fun addFunction(sql: String): Requester {
-        DefinitionFunction(sql).let {
-            functions[it.name] = Function(it, connection)
-        }
-        return this
-    }
-
-    fun addFunction(functionsDirectory: URI): Requester {
+    fun addFunctions(functionsDirectory: URI) {
         functionsDirectory.searchSqlFiles()
-            .forEach {
-                if (it is DefinitionFunction) {
-                    addFunction(it)
-                }
-            }
-        return this
+            .filterIsInstance(DefinitionFunction::class.java)
+            .forEach(this::addFunction)
     }
 
-    fun getFunction(name: String): Function {
-        if (functions[name] === null) {
-            throw Exception("No function defined for $name")
-        }
-        return functions[name]!!
-    }
+    fun getFunction(name: String): Function = functions[name] ?: throw NoFunctionDefined(name)
 
-    fun getQuery(path: String): Query {
-        if (queries[path] === null) {
-            throw Exception("No query defined in $path")
-        }
-        return queries[path]!!
-    }
+    fun getQuery(path: String): Query = queries[path] ?: throw NoQueryDefined(path)
 
-    class RequesterFactory(
-        private val connection: Connection,
-        private val queriesDirectory: URI? = null,
-        private val functionsDirectory: URI? = null
-    ) {
-        constructor(
-            host: String = "localhost",
-            port: Int = 5432,
-            database: String,
-            username: String,
-            password: String,
-            queriesDirectory: URI? = null,
-            functionsDirectory: URI? = null
-        ) : this(
-            Connection(host = host, port = port, database = database, username = username, password = password),
-            queriesDirectory,
-            functionsDirectory
-        )
-
-        fun createRequester(): Requester {
-            return initRequester(Requester(connection))
-        }
-
-        private fun initRequester(req: Requester): Requester {
-            if (queriesDirectory !== null) {
-                req.addQuery(queriesDirectory)
-            }
-
-            if (functionsDirectory !== null) {
-                req.addFunction(functionsDirectory)
-            }
-
-            return req
-        }
-    }
+    class NoFunctionDefined(name: String) : Exception("No function defined for $name")
+    class NoQueryDefined(path: String) : Exception("No query defined in $path")
 }
diff --git a/src/main/kotlin/fr/postgresjson/definition/Function.kt b/src/main/kotlin/fr/postgresjson/definition/Function.kt
index cab23c8..02c6dc1 100644
--- a/src/main/kotlin/fr/postgresjson/definition/Function.kt
+++ b/src/main/kotlin/fr/postgresjson/definition/Function.kt
@@ -1,11 +1,10 @@
 package fr.postgresjson.definition
 
-import java.io.File
 import java.nio.file.Path
 
 class Function(
     override val script: String,
-    override var source: Path? = null
+    override val source: Path? = null
 ) : Resource, ParametersInterface {
     val returns: String
     override val name: String
@@ -70,21 +69,4 @@ class Function(
     infix fun `is different from`(other: Function): Boolean {
         return other.script != this.script
     }
-
-    companion object {
-        fun build(source: File): List<Function> {
-            return source.readText()
-                .split(
-                    "CREATE +(OR REPLACE +)?(PROCEDURE|FUNCTION)".toRegex(
-                        setOf(
-                            RegexOption.IGNORE_CASE,
-                            RegexOption.MULTILINE
-                        )
-                    )
-                )
-                .map {
-                    Function("CREATE OR REPLACE FUNCTION $it")
-                }
-        }
-    }
 }
diff --git a/src/main/kotlin/fr/postgresjson/definition/Migration.kt b/src/main/kotlin/fr/postgresjson/definition/Migration.kt
index 6b4889c..8c484c1 100644
--- a/src/main/kotlin/fr/postgresjson/definition/Migration.kt
+++ b/src/main/kotlin/fr/postgresjson/definition/Migration.kt
@@ -4,14 +4,12 @@ import java.nio.file.Path
 
 class Migration(
     override val script: String,
-    source: Path
+    override var source: Path
 ) : Resource {
     override val name: String
     val direction: Direction
-    override var source: Path? = null
 
     init {
-        this.source = source
         this.direction = source.fileName.toString()
             .let {
                 when {
diff --git a/src/main/kotlin/fr/postgresjson/definition/Parameter.kt b/src/main/kotlin/fr/postgresjson/definition/Parameter.kt
index 03fbf7f..9b97294 100644
--- a/src/main/kotlin/fr/postgresjson/definition/Parameter.kt
+++ b/src/main/kotlin/fr/postgresjson/definition/Parameter.kt
@@ -1,5 +1,7 @@
 package fr.postgresjson.definition
 
+import java.util.Locale
+
 interface ParameterI {
     val name: String
     val type: String
@@ -21,7 +23,7 @@ class Parameter(val name: String, val type: String, direction: Direction? = Dire
     constructor(name: String, type: String, direction: String? = "IN", default: Any? = null) : this(
         name = name,
         type = type,
-        direction = direction?.let { Direction.valueOf(direction.toUpperCase()) },
+        direction = direction?.let { Direction.valueOf(direction.uppercase(Locale.getDefault())) },
         default = default
     )
 
diff --git a/src/main/kotlin/fr/postgresjson/definition/Query.kt b/src/main/kotlin/fr/postgresjson/definition/Query.kt
index 9c698ac..1989f18 100644
--- a/src/main/kotlin/fr/postgresjson/definition/Query.kt
+++ b/src/main/kotlin/fr/postgresjson/definition/Query.kt
@@ -4,9 +4,8 @@ import java.nio.file.Path
 
 class Query(
     override val script: String,
-    source: Path
+    override var source: Path
 ) : Resource {
-    override var source: Path? = source
     override val name: String = getNameFromComment(script) ?: getNameFromFile(source)
 
     /** Try to get name from comment in file */
diff --git a/src/main/kotlin/fr/postgresjson/definition/Resource.kt b/src/main/kotlin/fr/postgresjson/definition/Resource.kt
index a86157a..4a96a9b 100644
--- a/src/main/kotlin/fr/postgresjson/definition/Resource.kt
+++ b/src/main/kotlin/fr/postgresjson/definition/Resource.kt
@@ -4,10 +4,10 @@ import java.io.File
 import java.net.URL
 import java.nio.file.Path
 
-interface Resource {
+sealed interface Resource {
     val name: String
     val script: String
-    var source: Path?
+    val source: Path?
 
     open class ParseException(message: String, cause: Throwable? = null) : Exception(message, cause)
 
@@ -34,7 +34,3 @@ interface Resource {
             }
     }
 }
-
-interface ResourceCollection {
-    val parameters: List<Parameter>
-}
diff --git a/src/main/kotlin/fr/postgresjson/migration/Function.kt b/src/main/kotlin/fr/postgresjson/migration/Function.kt
index 71c5a3e..20a31dc 100644
--- a/src/main/kotlin/fr/postgresjson/migration/Function.kt
+++ b/src/main/kotlin/fr/postgresjson/migration/Function.kt
@@ -2,6 +2,7 @@ package fr.postgresjson.migration
 
 import com.github.jasync.sql.db.postgresql.exceptions.GenericDatabaseException
 import fr.postgresjson.connexion.Connection
+import fr.postgresjson.connexion.selectOne
 import fr.postgresjson.migration.Migration.Action
 import fr.postgresjson.migration.Migration.Status
 import java.util.Date
@@ -46,21 +47,25 @@ data class Function(
             }
         }
 
-        this::class.java.classLoader.getResource("sql/migration/insertFunction.sql")!!.readText().let {
-            connection.selectOne<MigrationEntity>(it, listOf(up.name, up.getDefinition(), up.script, down.script))?.let { function ->
+        this::class.java.classLoader
+            .getResource("sql/migration/insertFunction.sql")!!.readText()
+            .let { connection.selectOne<MigrationEntity>(it, listOf(up.name, up.getDefinition(), up.script, down.script)) }
+            ?.let { function ->
                 executedAt = function.executedAt
                 doExecute = Action.OK
             }
-        }
+
         return Status.OK
     }
 
     override fun down(): Status {
         connection.sendQuery(down.script)
 
-        this::class.java.classLoader.getResource("sql/migration/deleteFunction.sql")!!.readText().let {
-            connection.sendQuery(it, listOf(down.name))
-        }
+        this::class.java.classLoader
+            .getResource("sql/migration/deleteFunction.sql")!!
+            .readText()
+            .let { connection.sendQuery(it, listOf(down.name)) }
+
         return Status.OK
     }
 
@@ -68,29 +73,15 @@ data class Function(
         connection.inTransaction {
             up()
             down()
-            it.sendQuery("ROLLBACK")
-        }.join()
-
-        return Status.OK // TODO
-    }
-
-    override fun status(): Status {
-        connection.inTransaction {
-            up()
-            down()
-            it.sendQuery("ROLLBACK")
-        }.join()
-
-        return Status.OK // TODO
-    }
-
-    fun copy(): Function {
-        return this.copy(up = up, down = down, connection = connection, executedAt = executedAt).also {
-            it.doExecute = this.doExecute
+            sendQuery("ROLLBACK")
         }
+
+        return Status.OK
     }
 
-    infix fun `is different from`(other: DefinitionFunction): Boolean {
-        return other.script != this.up.script
-    }
+    fun copy(): Function = this
+        .copy(up = up, down = down, connection = connection, executedAt = executedAt)
+        .also { it.doExecute = this.doExecute }
+
+    infix fun `is different from`(other: DefinitionFunction): Boolean = other.script != this.up.script
 }
diff --git a/src/main/kotlin/fr/postgresjson/migration/MigrationScript.kt b/src/main/kotlin/fr/postgresjson/migration/MigrationScript.kt
index 80a72c2..7092879 100644
--- a/src/main/kotlin/fr/postgresjson/migration/MigrationScript.kt
+++ b/src/main/kotlin/fr/postgresjson/migration/MigrationScript.kt
@@ -1,6 +1,7 @@
 package fr.postgresjson.migration
 
 import fr.postgresjson.connexion.Connection
+import fr.postgresjson.connexion.selectOne
 import fr.postgresjson.entity.Entity
 import fr.postgresjson.migration.Migration.Action
 import java.util.Date
@@ -41,20 +42,10 @@ data class MigrationScript(
         connection.inTransaction {
             up()
             down()
-            it.sendQuery("ROLLBACK")
-        }.join()
+            sendQuery("ROLLBACK")
+        }
 
-        return Migration.Status.OK // TODO
-    }
-
-    override fun status(): Migration.Status {
-        connection.inTransaction {
-            up()
-            down()
-            it.sendQuery("ROLLBACK")
-        }.join()
-
-        return Migration.Status.OK // TODO
+        return Migration.Status.OK
     }
 
     fun copy(): MigrationScript {
diff --git a/src/main/kotlin/fr/postgresjson/migration/Migrations.kt b/src/main/kotlin/fr/postgresjson/migration/Migrations.kt
index 984fe0a..751018f 100644
--- a/src/main/kotlin/fr/postgresjson/migration/Migrations.kt
+++ b/src/main/kotlin/fr/postgresjson/migration/Migrations.kt
@@ -28,7 +28,6 @@ interface Migration {
     fun up(): Status
     fun down(): Status
     fun test(): Status
-    fun status(): Status
 
     enum class Status(i: Int) { OK(2), UP_FAIL(0), DOWN_FAIL(1) }
     enum class Action { OK, UP, DOWN }
diff --git a/src/main/kotlin/fr/postgresjson/serializer/Serializer.kt b/src/main/kotlin/fr/postgresjson/serializer/Serializer.kt
index bf4719a..df8e250 100644
--- a/src/main/kotlin/fr/postgresjson/serializer/Serializer.kt
+++ b/src/main/kotlin/fr/postgresjson/serializer/Serializer.kt
@@ -3,7 +3,7 @@ package fr.postgresjson.serializer
 import com.fasterxml.jackson.core.type.TypeReference
 import com.fasterxml.jackson.databind.DeserializationFeature
 import com.fasterxml.jackson.databind.ObjectMapper
-import com.fasterxml.jackson.databind.PropertyNamingStrategy
+import com.fasterxml.jackson.databind.PropertyNamingStrategies
 import com.fasterxml.jackson.databind.SerializationFeature
 import com.fasterxml.jackson.databind.module.SimpleModule
 import com.fasterxml.jackson.datatype.joda.JodaModule
@@ -15,7 +15,7 @@ class Serializer(val mapper: ObjectMapper = jacksonObjectMapper()) {
     init {
         val module = SimpleModule()
         mapper.registerModule(module)
-        mapper.propertyNamingStrategy = PropertyNamingStrategy.SNAKE_CASE
+        mapper.propertyNamingStrategy = PropertyNamingStrategies.SNAKE_CASE
 
         mapper.registerModule(JodaModule())
         mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)
@@ -42,13 +42,10 @@ class Serializer(val mapper: ObjectMapper = jacksonObjectMapper()) {
     inline fun <reified E> deserializeList(json: String): E {
         return deserializeList(json, object : TypeReference<E>() {})
     }
-
-    fun <E> deserialize(json: String, target: E): E {
-        return mapper.readerForUpdating(target).readValue<E>(json)
-    }
 }
 
 fun Serializable.serialize(pretty: Boolean = false) = Serializer().serialize(this, pretty)
 fun List<Serializable>.serialize(pretty: Boolean = false) = Serializer().serialize(this, pretty)
-inline fun <reified E : Serializable> E.deserialize(json: String) = Serializer().deserialize(json, this)
 inline fun <reified E : Serializable> String.deserialize() = Serializer().deserialize<E>(this)
+
+inline fun <reified T : Serializable> T.toTypeReference(): TypeReference<T> = object : TypeReference<T>() {}
diff --git a/src/test/kotlin/fr/postgresjson/ConnectionTest.kt b/src/test/kotlin/fr/postgresjson/ConnectionTest.kt
index 8dfdc3e..a388552 100644
--- a/src/test/kotlin/fr/postgresjson/ConnectionTest.kt
+++ b/src/test/kotlin/fr/postgresjson/ConnectionTest.kt
@@ -1,22 +1,31 @@
 package fr.postgresjson
 
+import com.fasterxml.jackson.core.type.TypeReference
+import fr.postgresjson.connexion.Connection.QueryError
 import fr.postgresjson.connexion.Paginated
+import fr.postgresjson.connexion.select
+import fr.postgresjson.connexion.selectOne
 import fr.postgresjson.entity.Parameter
 import fr.postgresjson.entity.UuidEntity
+import fr.postgresjson.serializer.deserialize
+import fr.postgresjson.serializer.toTypeReference
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertNotNull
 import org.junit.Assert.assertTrue
 import org.junit.jupiter.api.Assertions
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.TestInstance
+import org.junit.jupiter.api.assertThrows
 import java.util.UUID
+import kotlin.test.assertContains
+import kotlin.test.assertNull
 
 @TestInstance(TestInstance.Lifecycle.PER_CLASS)
-class ConnectionTest() : TestAbstract() {
+class ConnectionTest : TestAbstract() {
     private class ObjTest(val name: String, id: UUID = UUID.fromString("2c0243ed-ff4d-4b9f-a52b-e38c71b0ed00")) : UuidEntity(id)
     private class ObjTest2(val title: String, var test: ObjTest?) : UuidEntity()
-    private class ObjTest3(val first: String, var seconde: String, var third: Int) : UuidEntity()
-    private class ObjTestWithParameterObject(var first: ParameterObject, var seconde: ParameterObject) : UuidEntity()
+    private class ObjTest3(val first: String, var second: String, var third: Int) : UuidEntity()
+    private class ObjTestWithParameterObject(var first: ParameterObject, var second: ParameterObject) : UuidEntity()
     private class ParameterObject(var third: String) : Parameter
 
     @Test
@@ -48,12 +57,33 @@ class ConnectionTest() : TestAbstract() {
     }
 
     @Test
-    fun callRequestWithArgs() {
+    fun `test call request with args`() {
         val result: ObjTest? = connection.selectOne("select json_build_object('id', '2c0243ed-ff4d-4b9f-a52b-e38c71b0ed00', 'name', ?::text)", listOf("myName"))
         assertNotNull(result)
         assertEquals("myName", result!!.name)
     }
 
+    @Test
+    fun `test call request without args`() {
+        val result: ObjTest? = connection.selectOne("select json_build_object('id', '2c0243ed-ff4d-4b9f-a52b-e38c71b0ed00', 'name', 'myName')", object : TypeReference<ObjTest>() {}) {
+            assertEquals("myName", this.rows[0].getString(0)?.deserialize<ObjTest>()?.name)
+        }
+        assertNotNull(result)
+        assertEquals("myName", result!!.name)
+    }
+
+    @Test
+    fun `test call request return null`() {
+        val result: ObjTest? = connection.selectOne("select null;", object : TypeReference<ObjTest>() {})
+        assertNull(result)
+    }
+
+    @Test
+    fun `test call request return nothing`() {
+        val result: ObjTest? = connection.selectOne("select * from test where false;", object : TypeReference<ObjTest>() {})
+        assertNull(result)
+    }
+
     @Test
     fun callRequestWithArgsEntity() {
         val o = ObjTest("myName", id = UUID.fromString("2c0243ed-ff4d-4b9f-a52b-e38c71b0ed00"))
@@ -64,6 +94,15 @@ class ConnectionTest() : TestAbstract() {
         assertEquals(obj.name, "myName")
     }
 
+    @Test
+    fun `test update Entity`() {
+        val obj = ObjTest("before", id = UUID.fromString("1e5f5d41-6d14-4007-897b-0ed2616bec96"))
+        val objUpdated: ObjTest? = connection.update("select ?::jsonb || jsonb_build_object('name', 'after');", obj.toTypeReference(), obj)
+        assertTrue(objUpdated is ObjTest)
+        assertTrue(objUpdated!!.id == UUID.fromString("1e5f5d41-6d14-4007-897b-0ed2616bec96"))
+        assertTrue(objUpdated.name == "after")
+    }
+
     @Test
     fun callExec() {
         val o = ObjTest("myName")
@@ -74,69 +113,67 @@ class ConnectionTest() : TestAbstract() {
     @Test
     fun `select one with named parameters`() {
         val result: ObjTest3? = connection.selectOne(
-            "SELECT json_build_object('first', :first::text, 'seconde', :seconde::text, 'third', :third::int)",
+            "SELECT json_build_object('first', :first::text, 'second', :second::text, 'third', :third::int)",
             mapOf(
                 "first" to "ff",
-                "seconde" to "sec",
+                "second" to "sec",
                 "third" to 123
             )
         )
         assertEquals(result!!.first, "ff")
-        assertEquals(result.seconde, "sec")
+        assertEquals(result.second, "sec")
         assertEquals(result.third, 123)
     }
 
     @Test
     fun `select one with named parameters object`() {
         val result: ObjTestWithParameterObject? = connection.selectOne(
-            "SELECT json_build_object('first', :first::json, 'seconde', :seconde::json)",
+            "SELECT json_build_object('first', :first::json, 'second', :second::json)",
             mapOf(
                 "first" to ParameterObject("one"),
-                "seconde" to ParameterObject("two")
+                "second" to ParameterObject("two")
             )
         )
         assertEquals("one", result!!.first.third)
-        assertEquals("two", result.seconde.third)
+        assertEquals("two", result.second.third)
     }
 
     @Test
     fun `select with named parameters`() {
-        val params: Map<String, Any?> = mapOf(
-            "first" to "ff",
-            "third" to 123,
-            "seconde" to "sec"
-        )
         val result: List<ObjTest3> = connection.select(
             """
             SELECT json_build_array(
-                json_build_object('first', :first::text, 'seconde', :seconde::text, 'third', :third::int),
-                json_build_object('first', :first::text, 'seconde', :seconde::text, 'third', :third::int)
+                json_build_object('first', :first::text, 'second', :second::text, 'third', :third::int),
+                json_build_object('first', :first::text, 'second', :second::text, 'third', :third::int)
             )
             """.trimIndent(),
-            params
+            mapOf(
+                "first" to "ff",
+                "third" to 123,
+                "second" to "sec"
+            )
         )
         assertEquals(result[0].first, "ff")
-        assertEquals(result[0].seconde, "sec")
+        assertEquals(result[0].second, "sec")
         assertEquals(result[0].third, 123)
     }
 
     @Test
-    fun `selectOne with named parameters`() {
-        val params: Map<String, Any?> = mapOf(
+    fun `select with named parameters as vararg of Pair`() {
+        val result: List<ObjTest3> = connection.select(
+            """
+            SELECT json_build_array(
+                json_build_object('first', :first::text, 'second', :second::text, 'third', :third::int),
+                json_build_object('first', :first::text, 'second', :second::text, 'third', :third::int)
+            )
+            """.trimIndent(),
             "first" to "ff",
             "third" to 123,
-            "seconde" to "sec"
+            "second" to "sec"
         )
-        val result: ObjTest3? = connection.selectOne(
-            """
-            SELECT json_build_object('first', :first::text, 'seconde', :seconde::text, 'third', :third::int)
-            """.trimIndent(),
-            params
-        )
-        assertNotNull(result)
-        assertEquals(result!!.first, "ff")
-        assertEquals(result.seconde, "sec")
-        assertEquals(result.third, 123)
+        assertEquals(result[0].first, "ff")
+        assertEquals(result[0].second, "sec")
+        assertEquals(result[0].third, 123)
     }
 
     @Test
@@ -161,16 +198,141 @@ class ConnectionTest() : TestAbstract() {
         assertEquals(result.offset, 0)
     }
 
+    @Test
+    fun `test select paginated without result`() {
+        val result: Paginated<ObjTest> = connection.select(
+            """
+            SELECT null, 
+            10 as total
+            LIMIT :limit 
+            OFFSET :offset
+            """.trimIndent(),
+            1,
+            2,
+            object : TypeReference<List<ObjTest>>() {}
+        )
+        assertNotNull(result)
+        assertTrue(result.result.isEmpty())
+        assertEquals(0, result.result.size)
+        assertEquals(result.total, 10)
+        assertEquals(result.offset, 0)
+    }
+
+    @Test
+    fun `test select paginated`() {
+        val result: Paginated<ObjTest> = connection.select(
+            """
+            SELECT json_build_array(
+                jsonb_build_object(
+                    'name', :name::text,
+                    'id', 'e9f9a0f0-237c-47cf-98c5-be353f2f2ce3'
+                )
+            ), 
+            10 as total
+            LIMIT :limit 
+            OFFSET :offset
+            """.trimIndent(),
+            1,
+            2,
+            object : TypeReference<List<ObjTest>>() {},
+            mapOf(
+                "name" to "myName"
+            )
+        )
+        assertNotNull(result)
+        assertEquals("myName", result.result[0].name)
+        assertEquals(1, result.result.size)
+        assertEquals(result.total, 10)
+        assertEquals(result.offset, 0)
+    }
+
+    @Test
+    fun `test select paginated with no result`() {
+        assertThrows<QueryError> {
+            connection.select(
+                """
+                SELECT :name as name,
+                10 as total
+                LIMIT :limit 
+                OFFSET :offset
+                """.trimIndent(),
+                100,
+                10,
+                object : TypeReference<List<ObjTest>>() {},
+                mapOf(
+                    "name" to "myName"
+                )
+            )
+        }.run {
+            assertNotNull(message)
+            assertContains(message!!, "The query has no return")
+        }
+    }
+
+    @Test
+    fun `test select paginated with total was not integer`() {
+        assertThrows<QueryError> {
+            connection.select(
+                """
+                SELECT :name as name,
+                'plop' as total
+                LIMIT :limit 
+                OFFSET :offset
+                """.trimIndent(),
+                1,
+                10,
+                object : TypeReference<List<ObjTest>>() {},
+                mapOf(
+                    "name" to "myName"
+                )
+            )
+        }.run {
+            assertNotNull(message)
+            assertContains(message!!, """Column "total" must be an integer""")
+        }
+    }
+
+    @Test
+    fun `test select paginated without total`() {
+        val exception = assertThrows<QueryError> {
+            val result: Paginated<ObjTest> = connection.select(
+                """
+            SELECT null
+            LIMIT :limit 
+            OFFSET :offset
+                """.trimIndent(),
+                1,
+                2,
+                object : TypeReference<List<ObjTest>>() {}
+            )
+        }
+
+        assertEquals(
+            """
+            The query not return the "total" column
+            
+              > :offset = 0, :limit = 2
+              > SELECT null
+              > LIMIT :limit 
+              > OFFSET :offset
+              > -----
+              > ?column?
+              > null
+            """.trimIndent(),
+            exception.message
+        )
+    }
+
     @Test
     fun `selectOne with extra parameters`() {
         val params: Map<String, Any?> = mapOf(
             "first" to "ff",
             "third" to 123,
-            "seconde" to "sec"
+            "second" to "sec"
         )
         val result: ObjTest3? = connection.selectOne(
             """
-            SELECT json_build_object('first', :first::text, 'seconde', :seconde::text, 'third', :third::int), 'plop'::text as other
+            SELECT json_build_object('first', :first::text, 'second', :second::text, 'third', :third::int), 'plop'::text as other
             """.trimIndent(),
             params
         ) {
@@ -179,7 +341,39 @@ class ConnectionTest() : TestAbstract() {
         }
         assertNotNull(result)
         assertEquals("ff", result!!.first)
-        assertEquals("sec", result.seconde)
+        assertEquals("sec", result.second)
         assertEquals(123, result.third)
     }
+
+    @Test
+    fun `test exec without parameters`() {
+        connection.exec("select 42, 'hello';").run {
+            assertEquals(42, rows[0].getInt(0))
+            assertEquals("hello", rows[0].getString(1))
+        }
+    }
+
+    @Test
+    fun `test exec with one object as parameter`() {
+        val obj = ObjTest("myName", UUID.fromString("c606e216-53b3-43c8-a900-e727cb4a017c"))
+        connection.exec("select ?::jsonb->>'name'", obj).run {
+            assertEquals("myName", rows[0].getString(0))
+        }
+    }
+
+    @Test
+    fun `select one in transaction`() {
+        connection.inTransaction {
+            selectOne<ObjTestWithParameterObject>(
+                "SELECT json_build_object('first', :first::json, 'second', :second::json)",
+                mapOf(
+                    "first" to ParameterObject("one"),
+                    "second" to ParameterObject("two")
+                )
+            ).let { result ->
+                assertEquals("one", result!!.first.third)
+                assertEquals("two", result.second.third)
+            }
+        }
+    }
 }
diff --git a/src/test/kotlin/fr/postgresjson/EntityTest.kt b/src/test/kotlin/fr/postgresjson/EntityTest.kt
index 7b49fdb..1111f8d 100644
--- a/src/test/kotlin/fr/postgresjson/EntityTest.kt
+++ b/src/test/kotlin/fr/postgresjson/EntityTest.kt
@@ -16,11 +16,11 @@ import java.util.UUID
 @TestInstance(TestInstance.Lifecycle.PER_CLASS)
 class EntityTest() {
     private class User(id: UUID = UUID.randomUUID()) : Entity<UUID>(id)
-    private class ObjTest(var name: String) : UuidEntityExtended<Int?, User>(User(), User())
+    private class ObjTest(val name: String) : UuidEntityExtended<Int?, User>(User(), User())
 
     @Test
     fun getObject() {
-        val obj: ObjTest? = ObjTest("plop")
+        val obj = ObjTest("plop")
         assertTrue(obj is ObjTest)
         assertTrue(obj is UuidEntityExtended<Int?, User>)
         assertTrue(obj is EntityI)
diff --git a/src/test/kotlin/fr/postgresjson/MigrationTest.kt b/src/test/kotlin/fr/postgresjson/MigrationTest.kt
index ec4059c..6d97a34 100644
--- a/src/test/kotlin/fr/postgresjson/MigrationTest.kt
+++ b/src/test/kotlin/fr/postgresjson/MigrationTest.kt
@@ -1,6 +1,7 @@
 package fr.postgresjson
 
 import fr.postgresjson.connexion.Requester
+import fr.postgresjson.connexion.selectOne
 import fr.postgresjson.migration.Migration
 import fr.postgresjson.migration.Migrations
 import org.amshove.kluent.`should be equal to`
@@ -13,10 +14,10 @@ import org.junit.jupiter.api.TestInstance
 import java.util.UUID
 
 @TestInstance(TestInstance.Lifecycle.PER_CLASS)
-class MigrationTest() : TestAbstract() {
+class MigrationTest : TestAbstract() {
     @Test
     fun `run up query`() {
-        val resources = this::class.java.getResource("/sql/migrations").toURI()
+        val resources = this::class.java.getResource("/sql/migrations")!!.toURI()
         val m = Migrations(connection, resources)
         m.up().apply {
             this `should contain` Pair("1", Migration.Status.OK)
@@ -28,7 +29,7 @@ class MigrationTest() : TestAbstract() {
 
     @Test
     fun `migration up Query should throw error if no down`() {
-        val resources = this::class.java.getResource("/sql/migration_without_down").toURI()
+        val resources = this::class.java.getResource("/sql/migration_without_down")!!.toURI()
         invoking {
             Migrations(resources, connection)
         } shouldThrow Migrations.DownMigrationNotDefined::class
@@ -36,7 +37,7 @@ class MigrationTest() : TestAbstract() {
 
     @Test
     fun `run forced down query`() {
-        val resources = this::class.java.getResource("/sql/migrations").toURI()
+        val resources = this::class.java.getResource("/sql/migrations")!!.toURI()
         val m = Migrations(resources, connection)
         repeat(3) {
             m.down(true).apply {
@@ -48,7 +49,7 @@ class MigrationTest() : TestAbstract() {
 
     @Test
     fun `run dry migrations`() {
-        val resources = this::class.java.getResource("/sql/real_migrations").toURI()
+        val resources = this::class.java.getResource("/sql/real_migrations")!!.toURI()
         Migrations(resources, connection).apply {
             runDry().size `should be equal to` 2
         }
@@ -59,7 +60,7 @@ class MigrationTest() : TestAbstract() {
 
     @Test
     fun `run dry migrations launch twice`() {
-        val resources = this::class.java.getResource("/sql/real_migrations").toURI()
+        val resources = this::class.java.getResource("/sql/real_migrations")!!.toURI()
         Migrations(resources, connection).apply {
             runDry().size `should be equal to` 2
             runDry().size `should be equal to` 2
@@ -68,7 +69,7 @@ class MigrationTest() : TestAbstract() {
 
     @Test
     fun `run migrations`() {
-        val resources = this::class.java.getResource("/sql/real_migrations").toURI()
+        val resources = this::class.java.getResource("/sql/real_migrations")!!.toURI()
         Migrations(resources, connection).apply {
             run().apply {
                 size `should be equal to` 1
@@ -78,8 +79,8 @@ class MigrationTest() : TestAbstract() {
 
     @Test
     fun `run migrations force down`() {
-        val resources = this::class.java.getResource("/sql/real_migrations").toURI()
-        val resourcesFunctions = this::class.java.getResource("/sql/function/Test").toURI()
+        val resources = this::class.java.getResource("/sql/real_migrations")!!.toURI()
+        val resourcesFunctions = this::class.java.getResource("/sql/function/Test")!!.toURI()
         Migrations(listOf(resources, resourcesFunctions), connection).apply {
             up().apply {
                 size `should be equal to` 6
@@ -94,13 +95,12 @@ class MigrationTest() : TestAbstract() {
 
     @Test
     fun `run functions migrations`() {
-        val resources = this::class.java.getResource("/sql/function/Test").toURI()
+        val resources = this::class.java.getResource("/sql/function/Test")!!.toURI()
         Migrations(resources, connection).apply {
             run().size `should be equal to` 5
         }
 
-        val objTest: RequesterTest.ObjTest? = Requester(connection)
-            .addFunction(resources)
+        val objTest: RequesterTest.ObjTest? = Requester(connection, functionsDirectory = resources)
             .getFunction("test_function")
             .selectOne(listOf("test", "plip"))
 
@@ -110,20 +110,19 @@ class MigrationTest() : TestAbstract() {
 
     @Test
     fun `run functions migrations and drop if exist`() {
-        val resources = this::class.java.getResource("/sql/function/Test1").toURI()
+        val resources = this::class.java.getResource("/sql/function/Test1")!!.toURI()
         Migrations(resources, connection).apply {
             run().size `should be equal to` 1
         }
 
-        val objTest: RequesterTest.ObjTest? = Requester(connection)
-            .addFunction(resources)
+        val objTest: RequesterTest.ObjTest? = Requester(connection, functionsDirectory = resources)
             .getFunction("test_function_duplicate")
             .selectOne(listOf("test"))
 
         Assertions.assertEquals(objTest!!.id, UUID.fromString("457daad5-4f1b-4eb7-80ec-6882adb8cc7d"))
         Assertions.assertEquals(objTest.name, "test")
 
-        val resources2 = this::class.java.getResource("/sql/function/Test2").toURI()
+        val resources2 = this::class.java.getResource("/sql/function/Test2")!!.toURI()
         Migrations(resources2, connection).apply {
             run().size `should be equal to` 1
         }
diff --git a/src/test/kotlin/fr/postgresjson/RequesterTest.kt b/src/test/kotlin/fr/postgresjson/RequesterTest.kt
index ea02185..9ee5c4b 100644
--- a/src/test/kotlin/fr/postgresjson/RequesterTest.kt
+++ b/src/test/kotlin/fr/postgresjson/RequesterTest.kt
@@ -1,21 +1,102 @@
 package fr.postgresjson
 
+import com.fasterxml.jackson.core.type.TypeReference
+import fr.postgresjson.connexion.Connection.QueryError
 import fr.postgresjson.connexion.Paginated
 import fr.postgresjson.connexion.Requester
+import fr.postgresjson.connexion.Requester.NoFunctionDefined
+import fr.postgresjson.connexion.Requester.NoQueryDefined
+import fr.postgresjson.connexion.select
+import fr.postgresjson.connexion.selectOne
+import fr.postgresjson.connexion.update
 import fr.postgresjson.entity.UuidEntity
-import org.junit.Assert
+import fr.postgresjson.serializer.deserialize
 import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Assertions.assertThrows
 import org.junit.jupiter.api.Test
 import java.util.UUID
+import kotlin.test.assertNotNull
 
 class RequesterTest : TestAbstract() {
-    class ObjTest(var name: String, id: UUID = UUID.fromString("5623d902-3067-42f3-bfd9-095dbb12c29f")) : UuidEntity(id)
+    class ObjTest(val name: String, id: UUID = UUID.fromString("5623d902-3067-42f3-bfd9-095dbb12c29f")) : UuidEntity(id)
+
+    @Test
+    fun `requester constructor empty`() {
+        val resources = this::class.java.getResource("/sql/function/Test")!!.toURI()
+        val name: String = Requester(connection)
+            .apply { addFunctions(resources) }
+            .getFunction("test_function")
+            .name
+
+        assertEquals("test_function", name)
+    }
+
+    @Test
+    fun `requester constructor function directory`() {
+        val resources = this::class.java.getResource("/sql/function/Test")?.toURI()
+        val name: String = Requester(connection, functionsDirectory = resources)
+            .getFunction("test_function")
+            .name
+
+        assertEquals("test_function", name)
+    }
+
+    @Test
+    fun `requester constructor query directory`() {
+        val resources = this::class.java.getResource("/sql/query/Test")?.toURI()
+        val name: String = Requester(connection, queriesDirectory = resources)
+            .getQuery("DeleteTest")
+            .name
+
+        assertEquals("DeleteTest", name)
+    }
+
+    @Test
+    fun `function toString`() {
+        val resources = this::class.java.getResource("/sql/function/Test")?.toURI()
+        val name: String = Requester(connection, functionsDirectory = resources)
+            .getFunction("test_function")
+            .toString()
+
+        assertEquals("test_function", name)
+    }
+
+    @Test
+    fun `add function as string`() {
+        val sql = """
+            CREATE OR REPLACE FUNCTION test_function (name text default 'plop', IN hi text default 'hello', out result json)
+            LANGUAGE plpgsql
+            AS
+            $$
+            BEGIN
+                result = json_build_object('id', '457daad5-4f1b-4eb7-80ec-6882adb8cc7d', 'name', name);
+            END;
+            $$
+        """.trimIndent()
+        val name: String = Requester(connection)
+            .apply { addFunction(sql) }
+            .getFunction("test_function")
+            .name
+
+        assertEquals("test_function", name)
+    }
+
+    @Test
+    fun `add query from string`() {
+        val result: Int = Requester(connection)
+            .apply { addQuery("simpleTest", "select 42;") }
+            .getQuery("simpleTest")
+            .exec()
+            .rows[0].getInt(0)!!
+
+        assertEquals(result, 42)
+    }
 
     @Test
     fun `get query from file`() {
-        val resources = this::class.java.getResource("/sql/query").toURI()
+        val resources = this::class.java.getResource("/sql/query")!!.toURI()
         val objTest: ObjTest? = Requester(connection)
-            .addQuery(resources)
+            .apply { addQuery(resources) }
             .getQuery("selectOne")
             .selectOne()
 
@@ -23,11 +104,37 @@ class RequesterTest : TestAbstract() {
         assertEquals(objTest.name, "test")
     }
 
+    @Test
+    fun `get query from file with wrong name throw exception`() {
+        val resources = this::class.java.getResource("/sql/query")?.toURI()
+        assertThrows(NoQueryDefined::class.java) {
+            Requester(connection, queriesDirectory = resources)
+                .getQuery("wrongName")
+        }
+    }
+
+    @Test
+    fun `get queries from file`() {
+        val resources = this::class.java.getResource("/sql/query")?.toURI()
+        val name: String = Requester(connection, queriesDirectory = resources)
+            .getQueries()[0].name
+
+        assertEquals(name, "DeleteTest")
+    }
+
+    @Test
+    fun `get function from file with wrong name throw exception`() {
+        val resources = this::class.java.getResource("/sql/function/Test")?.toURI()
+        assertThrows(NoFunctionDefined::class.java) {
+            Requester(connection, functionsDirectory = resources)
+                .getFunction("wrongName")
+        }
+    }
+
     @Test
     fun `get function from file`() {
-        val resources = this::class.java.getResource("/sql/function/Test").toURI()
-        val objTest: ObjTest? = Requester(connection)
-            .addFunction(resources)
+        val resources = this::class.java.getResource("/sql/function/Test")?.toURI()
+        val objTest: ObjTest? = Requester(connection, functionsDirectory = resources)
             .getFunction("test_function")
             .selectOne(listOf("test", "plip"))
 
@@ -37,20 +144,28 @@ class RequesterTest : TestAbstract() {
 
     @Test
     fun `call exec on query`() {
-        val resources = this::class.java.getResource("/sql/query").toURI()
-        val result = Requester(connection)
-            .addQuery(resources)
+        val resources = this::class.java.getResource("/sql/query")?.toURI()
+        val result = Requester(connection, queriesDirectory = resources)
             .getQuery("selectOne")
             .exec()
 
         assertEquals(1, result.rowsAffected)
     }
 
+    @Test
+    fun `call exec on query with a list of arguments`() {
+        val resources = this::class.java.getResource("/sql/query")?.toURI()
+        val result = Requester(connection, queriesDirectory = resources)
+            .getQuery("selectOneWithParameters")
+            .exec(listOf("myName"))
+
+        assertEquals("myName", result.rows[0].getString(0)?.deserialize<ObjTest>()?.name)
+    }
+
     @Test
     fun `call exec on function`() {
-        val resources = this::class.java.getResource("/sql/function/Test").toURI()
-        val result = Requester(connection)
-            .addFunction(resources)
+        val resources = this::class.java.getResource("/sql/function/Test")?.toURI()
+        val result = Requester(connection, functionsDirectory = resources)
             .getFunction("test_function")
             .exec(listOf("test", "plip"))
 
@@ -58,32 +173,118 @@ class RequesterTest : TestAbstract() {
     }
 
     @Test
-    fun `call sendQuery on query with name`() {
-        val resources = this::class.java.getResource("/sql/query").toURI()
-        val result = Requester(connection)
-            .addQuery(resources)
+    fun `call exec on query with name`() {
+        val resources = this::class.java.getResource("/sql/query")?.toURI()
+        val result = Requester(connection, queriesDirectory = resources)
             .getQuery("DeleteTest")
-            .sendQuery()
+            .exec()
 
-        assertEquals(0, result)
+        assertEquals(0, result.rowsAffected)
     }
 
     @Test
-    fun `call sendQuery on function`() {
-        val resources = this::class.java.getResource("/sql/function/Test").toURI()
-        val result = Requester(connection)
-            .addFunction(resources)
-            .getFunction("function_void")
-            .sendQuery(listOf("test"))
+    fun `call sendQuery with same name of arguments`() {
+        val resources = this::class.java.getResource("/sql/query")?.toURI()
+        Requester(connection, queriesDirectory = resources)
+            .getQuery("selectMultipleWithSameArgs")
+            .sendQuery("name" to "myName").run {
+                assertEquals("myName", rows[0].getString("firstName"))
+                assertEquals("myName", rows[0].getString("secondName"))
+            }
+    }
 
-        assertEquals(0, result)
+    @Test
+    fun `call sendQuery with same name of arguments as list`() {
+        val resources = this::class.java.getResource("/sql/query")?.toURI()
+        Requester(connection, queriesDirectory = resources)
+            .getQuery("selectMultipleWithSameArgs")
+            .sendQuery(listOf("myName", "myName2")).run {
+                assertEquals("myName", rows[0].getString("firstName"))
+                assertEquals("myName2", rows[0].getString("secondName"))
+            }
+    }
+
+    @Test
+    fun `call sendQuery with arguments on not same orders`() {
+        val resources = this::class.java.getResource("/sql/query")?.toURI()
+        Requester(connection, queriesDirectory = resources)
+            .getQuery("selectMultipleDifferentArgs")
+            .sendQuery("first" to "firstName", "second" to "secondName").run {
+                assertEquals("firstName", rows[0].getString("firstName"))
+                assertEquals("secondName", rows[0].getString("secondName"))
+            }
+
+        Requester(connection, queriesDirectory = resources)
+            .getQuery("selectMultipleDifferentArgs")
+            .sendQuery("second" to "secondName", "first" to "firstName").run {
+                assertEquals("firstName", rows[0].getString("firstName"))
+                assertEquals("secondName", rows[0].getString("secondName"))
+            }
+
+        Requester(connection, queriesDirectory = resources)
+            .getQuery("selectMultipleDifferentArgs")
+            .sendQuery("second" to "secondName", "first" to "firstName").run {
+                assertEquals("firstName", rows[0].getString(0))
+                assertEquals("secondName", rows[0].getString(1))
+            }
+    }
+
+    @Test
+    fun `call sendQuery with wrong number of arguments`() {
+        val resources = this::class.java.getResource("/sql/query")?.toURI()
+
+        assertThrows(QueryError::class.java) {
+            Requester(connection, queriesDirectory = resources)
+                .getQuery("selectMultipleDifferentArgs")
+                .sendQuery("first" to "firstName")
+        }.let {
+            assertEquals(
+                """
+                Parameter "second" missing
+
+                  > :first = firstName
+                  > SELECT :first::text as "firstName", :second::text as "secondName";
+                """.trimIndent(),
+                it.message
+            )
+        }
+    }
+
+    @Test
+    fun `call sendQuery with wrong number of arguments as list`() {
+        val resources = this::class.java.getResource("/sql/query")?.toURI()
+
+        assertThrows(QueryError::class.java) {
+            Requester(connection, queriesDirectory = resources)
+                .getQuery("selectMultipleDifferentArgs")
+                .sendQuery(listOf("firstName"))
+        }.let {
+            assertEquals(
+                """
+                Parameter 1 missing
+                
+                  > firstName
+                  > SELECT ?::text as "firstName", ?::text as "secondName";
+                """.trimIndent(),
+                it.message
+            )
+        }
+    }
+
+    @Test
+    fun `call exec on function with pair as arguments`() {
+        val resources = this::class.java.getResource("/sql/function/Test")?.toURI()
+        val result = Requester(connection, functionsDirectory = resources)
+            .getFunction("function_void")
+            .exec("name" to "test")
+
+        assertEquals(1, result.rowsAffected)
     }
 
     @Test
     fun `call selectOne on function`() {
-        val resources = this::class.java.getResource("/sql/function/Test").toURI()
-        val obj: ObjTest = Requester(connection)
-            .addFunction(resources)
+        val resources = this::class.java.getResource("/sql/function/Test")?.toURI()
+        val obj: ObjTest = Requester(connection, functionsDirectory = resources)
             .getFunction("test_function")
             .selectOne(mapOf("name" to "myName"))!!
 
@@ -91,23 +292,43 @@ class RequesterTest : TestAbstract() {
     }
 
     @Test
-    fun `call selectOne on function with object`() {
-        val resources = this::class.java.getResource("/sql/function/Test").toURI()
+    fun `call selectOne on function with object and named argument`() {
+        val resources = this::class.java.getResource("/sql/function/Test")?.toURI()
         val obj2 = ObjTest("original")
-        val obj: ObjTest = Requester(connection)
-            .addFunction(resources)
+        val obj: ObjTest = Requester(connection, functionsDirectory = resources)
             .getFunction("test_function_object")
             .selectOne("resource" to obj2)!!
 
         assertEquals("changedName", obj.name)
-        assertEquals("changedName", obj2.name)
+        assertEquals("original", obj2.name)
+    }
+
+    @Test
+    fun `call selectOne on function with object`() {
+        val resources = this::class.java.getResource("/sql/function/Test")?.toURI()
+        val obj2 = ObjTest("original")
+        val obj: ObjTest = Requester(connection, functionsDirectory = resources)
+            .getFunction("test_function_object")
+            .update(obj2)!!
+
+        assertEquals("changedName", obj.name)
+        assertEquals("original", obj2.name)
+    }
+
+    @Test
+    fun `call selectOne on function with object and no arguments`() {
+        val resources = this::class.java.getResource("/sql/function/Test")?.toURI()
+        val obj: ObjTest = Requester(connection, functionsDirectory = resources)
+            .getFunction("test_function")
+            .selectOne()!!
+
+        assertEquals("plop", obj.name)
     }
 
     @Test
     fun `call selectOne on query`() {
-        val resources = this::class.java.getResource("/sql/query").toURI()
-        val obj: ObjTest = Requester(connection)
-            .addQuery(resources)
+        val resources = this::class.java.getResource("/sql/query")?.toURI()
+        val obj: ObjTest = Requester(connection, queriesDirectory = resources)
             .getQuery("selectOneWithParameters")
             .selectOne(mapOf("name" to "myName"))!!
 
@@ -115,55 +336,160 @@ class RequesterTest : TestAbstract() {
     }
 
     @Test
-    fun `call select (multiple) on function`() {
-        val resources = this::class.java.getResource("/sql/function/Test").toURI()
-        val obj: List<ObjTest>? = Requester(connection)
-            .addFunction(resources)
+    fun `call select (multiple) on function with named argument`() {
+        val resources = this::class.java.getResource("/sql/function/Test")?.toURI()
+        val obj: List<ObjTest> = Requester(connection, functionsDirectory = resources)
             .getFunction("test_function_multiple")
             .select(mapOf("name" to "myName"))
 
-        assertEquals("myName", obj!![0].name)
+        assertEquals("myName", obj[0].name)
+    }
+
+    @Test
+    fun `call select (multiple) on function with ordered arguments`() {
+        val resources = this::class.java.getResource("/sql/function/Test")?.toURI()
+        val obj: List<ObjTest> = Requester(connection, functionsDirectory = resources)
+            .getFunction("test_function_multiple")
+            .select(listOf("myName"))
+
+        assertEquals("myName", obj[0].name)
+    }
+
+    @Test
+    fun `call select multiple (named arguments)`() {
+        val resources = this::class.java.getResource("/sql/query")?.toURI()
+        Requester(connection, queriesDirectory = resources)
+            .getQuery("selectMultiple").apply {
+                select<ObjTest>(mapOf("name" to "ff")).let { result ->
+                    assertNotNull(result)
+                    assertEquals("ff", result[0].name)
+                    assertEquals("ff-2", result[1].name)
+                }
+            }.apply {
+                select<ObjTest>(object : TypeReference<List<ObjTest>>() {}, mapOf("name" to "ff")).let { result ->
+                    assertNotNull(result)
+                    assertEquals("ff", result[0].name)
+                    assertEquals("ff-2", result[1].name)
+                }
+            }
+    }
+
+    @Test
+    fun `call select multiple (named arguments as pair)`() {
+        val resources = this::class.java.getResource("/sql/query")?.toURI()
+        Requester(connection, queriesDirectory = resources)
+            .getQuery("selectMultiple").apply {
+                select<ObjTest>("name" to "ff").let { result ->
+                    assertNotNull(result)
+                    assertEquals("ff", result[0].name)
+                    assertEquals("ff-2", result[1].name)
+                }
+            }.apply {
+                select<ObjTest>(object : TypeReference<List<ObjTest>>() {}, "name" to "ff").let { result ->
+                    assertNotNull(result)
+                    assertEquals("ff", result[0].name)
+                    assertEquals("ff-2", result[1].name)
+                }
+            }
+    }
+
+    @Test
+    fun `call select multiple (ordered argument)`() {
+        val resources = this::class.java.getResource("/sql/query")?.toURI()
+        Requester(connection, queriesDirectory = resources)
+            .getQuery("selectMultipleOrderedArgs").apply {
+                select<ObjTest>(listOf("ff", "aa")).let { result ->
+                    assertNotNull(result)
+                    assertEquals("ff", result[0].name)
+                    assertEquals("aa-2", result[1].name)
+                }
+            }.apply {
+                select<ObjTest>(object : TypeReference<List<ObjTest>>() {}, listOf("ff", "aa")).let { result ->
+                    assertNotNull(result)
+                    assertEquals("ff", result[0].name)
+                    assertEquals("aa-2", result[1].name)
+                }
+            }
     }
 
     @Test
     fun `call select paginated on query`() {
-        val resources = this::class.java.getResource("/sql/query").toURI()
-        val result: Paginated<ObjTest> = Requester(connection)
-            .addQuery(resources)
+        val resources = this::class.java.getResource("/sql/query")?.toURI()
+        val result: Paginated<ObjTest> = Requester(connection, queriesDirectory = resources)
             .getQuery("selectPaginated")
             .select(1, 2, mapOf("name" to "ff"))
-        Assert.assertNotNull(result)
-        Assert.assertEquals("ff", result.result[0].name)
-        Assert.assertEquals("ff-2", result.result[1].name)
-        Assert.assertEquals(10, result.total)
-        Assert.assertEquals(0, result.offset)
+        assertNotNull(result)
+        assertEquals("ff", result.result[0].name)
+        assertEquals("ff-2", result.result[1].name)
+        assertEquals(10, result.total)
+        assertEquals(0, result.offset)
     }
 
     @Test
     fun `call select paginated on function`() {
-        val resources = this::class.java.getResource("/sql/function").toURI()
-        val result: Paginated<ObjTest> = Requester(connection)
-            .addFunction(resources)
+        val resources = this::class.java.getResource("/sql/function")?.toURI()
+        Requester(connection, functionsDirectory = resources)
+            .getFunction("test_function_paginated").apply {
+                select<ObjTest>(1, 2, mapOf("name" to "ff")).run {
+                    assertNotNull(result)
+                    assertEquals("ff", result[0].name)
+                    assertEquals("ff-2", result[1].name)
+                    assertEquals(10, total)
+                    assertEquals(0, offset)
+                }
+            }.apply {
+                select<ObjTest>(1, 2, object : TypeReference<List<ObjTest>>() {}, mapOf("name" to "ff")).run {
+                    assertNotNull(result)
+                    assertEquals("ff", result[0].name)
+                    assertEquals("ff-2", result[1].name)
+                    assertEquals(10, total)
+                    assertEquals(0, offset)
+                }
+            }
+    }
+
+    @Test
+    fun `call select paginated on function with vararg`() {
+        val resources = this::class.java.getResource("/sql/function")?.toURI()
+        Requester(connection, functionsDirectory = resources)
             .getFunction("test_function_paginated")
-            .select(1, 2, mapOf("name" to "ff"))
-        Assert.assertNotNull(result)
-        Assert.assertEquals("ff", result.result[0].name)
-        Assert.assertEquals("ff-2", result.result[1].name)
-        Assert.assertEquals(10, result.total)
-        Assert.assertEquals(0, result.offset)
+            .select<ObjTest>(1, 2, "name" to "ff").run {
+                assertNotNull(result)
+                assertEquals("ff", result[0].name)
+                assertEquals("ff-2", result[1].name)
+                assertEquals(10, total)
+                assertEquals(0, offset)
+            }
+
+        Requester(connection, functionsDirectory = resources)
+            .getFunction("test_function_paginated")
+            .select(1, 2, object : TypeReference<List<ObjTest>>() {}, "name" to "ff").run {
+                assertNotNull(result)
+                assertEquals("ff", result[0].name)
+                assertEquals("ff-2", result[1].name)
+                assertEquals(10, total)
+                assertEquals(0, offset)
+            }
     }
 
     @Test
     fun `call selectOne on query with extra parameter`() {
-        val resources = this::class.java.getResource("/sql/query").toURI()
-        val obj: ObjTest = Requester(connection)
-            .addQuery(resources)
-            .getQuery("selectOneWithParameters")
-            .selectOne(mapOf("name" to "myName")) {
-                assertEquals("myName", it!!.name)
-                Assert.assertEquals("plop", rows[0].getString("other"))
-            }!!
-
-        assertEquals("myName", obj.name)
+        val resources = this::class.java.getResource("/sql/query")?.toURI()
+        Requester(connection, queriesDirectory = resources)
+            .getQuery("selectOneWithParameters").apply {
+                selectOne<ObjTest>(mapOf("name" to "myName")) {
+                    assertEquals("myName", it!!.name)
+                    assertEquals("plop", rows[0].getString("other"))
+                }!!.run {
+                    assertEquals("myName", name)
+                }
+            }.apply {
+                selectOne<ObjTest>(typeReference = object : TypeReference<ObjTest>() {}, values = mapOf("name" to "myName")) { it ->
+                    assertEquals("myName", it!!.name)
+                    assertEquals("plop", rows[0].getString("other"))
+                }!!.run {
+                    assertEquals("myName", name)
+                }
+            }
     }
 }
diff --git a/src/test/kotlin/fr/postgresjson/SerializerTest.kt b/src/test/kotlin/fr/postgresjson/SerializerTest.kt
index cbef4b1..b8d7b3a 100644
--- a/src/test/kotlin/fr/postgresjson/SerializerTest.kt
+++ b/src/test/kotlin/fr/postgresjson/SerializerTest.kt
@@ -2,7 +2,6 @@ package fr.postgresjson
 
 import fr.postgresjson.entity.UuidEntity
 import fr.postgresjson.serializer.Serializer
-import fr.postgresjson.serializer.deserialize
 import fr.postgresjson.serializer.serialize
 import org.joda.time.DateTime
 import org.junit.jupiter.api.Assertions.assertEquals
@@ -21,7 +20,6 @@ internal class SerializerTest {
 
     private val objSerialized: String = """{"val1":"plop","val2":123,"id":"829b1a29-5db8-47f9-9562-961c561ac528"}"""
     private val objSerializedWithExtra: String = """{"val1":"plop","val2":123,"id":"829b1a29-5db8-47f9-9562-961c561ac528","toto":"tata"}"""
-    private val objSerializedUpdate = """{"val1":"update","val2":123}"""
     private lateinit var obj: ObjTest
 
     @BeforeEach
@@ -69,20 +67,4 @@ internal class SerializerTest {
         assertEquals(obj.val1, objDeserialized!!.val1)
         assertEquals(obj.val2, objDeserialized.val2)
     }
-
-    @Test
-    fun deserializeUpdate() {
-        val objDeserialized: ObjTest = serializer.deserialize(objSerializedUpdate, obj)
-        assertTrue(obj === objDeserialized)
-        assertEquals("update", objDeserialized.val1)
-        assertEquals(123, objDeserialized.val2)
-    }
-
-    @Test
-    fun deserializeUpdate2() {
-        val objDeserialized = obj.deserialize(objSerializedUpdate)
-        assertTrue(obj === objDeserialized)
-        assertEquals("update", objDeserialized.val1)
-        assertEquals(123, objDeserialized.val2)
-    }
 }
diff --git a/src/test/kotlin/fr/postgresjson/TestAbstract.kt b/src/test/kotlin/fr/postgresjson/TestAbstract.kt
index dce0d78..433ed07 100644
--- a/src/test/kotlin/fr/postgresjson/TestAbstract.kt
+++ b/src/test/kotlin/fr/postgresjson/TestAbstract.kt
@@ -13,7 +13,7 @@ abstract class TestAbstract {
 
     @BeforeEach
     fun beforeAll() {
-        val initSQL = File(this::class.java.getResource("/fixtures/init.sql").toURI())
+        val initSQL = File(this::class.java.getResource("/fixtures/init.sql")!!.toURI())
         connection
             .connect()
             .sendQuery(initSQL.readText())
@@ -22,9 +22,9 @@ abstract class TestAbstract {
 
     @AfterEach
     fun afterAll() {
-        val downSQL = File(this::class.java.getResource("/fixtures/down.sql").toURI())
-        connection.connect().apply {
-            sendQuery(downSQL.readText()).join()
-        }.disconnect()
+        val downSQL = File(this::class.java.getResource("/fixtures/down.sql")!!.toURI())
+        connection
+            .apply { connect().sendQuery(downSQL.readText()).join() }
+            .disconnect()
     }
 }
diff --git a/src/test/resources/sql/query/Test/selectMultiple.sql b/src/test/resources/sql/query/Test/selectMultiple.sql
new file mode 100644
index 0000000..a8e41d6
--- /dev/null
+++ b/src/test/resources/sql/query/Test/selectMultiple.sql
@@ -0,0 +1,4 @@
+SELECT json_build_array(
+   json_build_object('id', '457daad5-4f1b-4eb7-80ec-6882adb8cc7d', 'name', :name::text),
+   json_build_object('id', '6085c12e-e94d-4ae1-b7ad-23acc7a82a98', 'name', :name::text || '-2')
+)
\ No newline at end of file
diff --git a/src/test/resources/sql/query/Test/selectMultipleDifferentArgs.sql b/src/test/resources/sql/query/Test/selectMultipleDifferentArgs.sql
new file mode 100644
index 0000000..b63306e
--- /dev/null
+++ b/src/test/resources/sql/query/Test/selectMultipleDifferentArgs.sql
@@ -0,0 +1 @@
+SELECT :first::text as "firstName", :second::text as "secondName";
\ No newline at end of file
diff --git a/src/test/resources/sql/query/Test/selectMultipleOrderedArgs.sql b/src/test/resources/sql/query/Test/selectMultipleOrderedArgs.sql
new file mode 100644
index 0000000..b7764a4
--- /dev/null
+++ b/src/test/resources/sql/query/Test/selectMultipleOrderedArgs.sql
@@ -0,0 +1,4 @@
+SELECT json_build_array(
+   json_build_object('id', '457daad5-4f1b-4eb7-80ec-6882adb8cc7d', 'name', ?::text),
+   json_build_object('id', '6085c12e-e94d-4ae1-b7ad-23acc7a82a98', 'name', ?::text || '-2')
+)
\ No newline at end of file
diff --git a/src/test/resources/sql/query/Test/selectMultipleWithSameArgs.sql b/src/test/resources/sql/query/Test/selectMultipleWithSameArgs.sql
new file mode 100644
index 0000000..9928968
--- /dev/null
+++ b/src/test/resources/sql/query/Test/selectMultipleWithSameArgs.sql
@@ -0,0 +1 @@
+SELECT :name::text as "firstName", :name::text as "secondName";
\ No newline at end of file