Dialect refactor improvements and clean up.

postgres/operators.go

@@ -0,0 +1,21 @@
+package postgres
+
+import "github.com/go-jet/jet/internal/jet"
+
+// --------- Arithmetic operators -------------//
+
+//var MINUSi = jet.MINUSi
+var MINUSf = jet.MINUSf
+
+//----------- Logical operators ---------------//
+
+var NOT = jet.NOT
+var BIT_NOT = jet.BIT_NOT
+
+func MINUSi(intExp IntegerExpression) IntegerExpression {
+	if intLit, ok := intExp.(jet.LiteralExpression); ok {
+		intLit.SetConstant(true)
+	}
+
+	return intExp
+}