postgres-json/docs/usage/raw-request.md

Raw request

You can execute query directly from the code like this: (see Init connection before)

import fr.postgresjson.connexion.Connection

val connection: Connection = TODO()

val result: QueryResult = connection.exec(
    "SELECT id FROM inventor WHERE name = :name",
    mapOf("name" to "Nikola Tesla")
)
val id: String = result.rows[0].getString(0)

And if you must map the query result with an entity, you can do it like this:

import java.util.UUID
import fr.postgresjson.entity.Serializable
import fr.postgresjson.connexion.Connection

val connection: Connection = TODO()

data class Inventor(
    val id: UUID = UUID.randomUUID(),
    val name: String
): Serializable

val result: Inventor? = connection.selectOne(
    """
    SELECT json_build_object(
        'id', '9e65de49-712e-47ce-8bf2-dfffae53a82e', 
        'name', :name
    )
    """,
    mapOf("name" to "Nikola Tesla")
)

val inventor = connection.selectOne<Inventor>("SELECT * FROM mytable WHERE id = :id")

val inventors: List<Inventor> = connection.select("SELECT * FROM mytable WHERE status = 'done'")

See ConnectionTest.kt for more examples.