diff --git a/src/main/kotlin/fr/postgresjson/functionGenerator/FunctionGenerator.kt b/src/main/kotlin/fr/postgresjson/functionGenerator/FunctionGenerator.kt
index c408f21..b443ddd 100644
--- a/src/main/kotlin/fr/postgresjson/functionGenerator/FunctionGenerator.kt
+++ b/src/main/kotlin/fr/postgresjson/functionGenerator/FunctionGenerator.kt
@@ -50,7 +50,14 @@ class FunctionGenerator(private val functionsDirectories: List<URI>) {
                 "character" -> "String"
                 "char" -> "String"
                 "int" -> "Int"
+                "smallint" -> "Int"
+                "integer" -> "Int"
+                "bigint" -> "Int"
+                "decimal" -> "Float"
+                "real" -> "Float"
+                "double precision" -> "Float"
                 "float" -> "Float"
+                "numeric" -> "Number"
                 "boolean" -> "Boolean"
                 "json" -> "S"
                 "jsonb" -> "S"