Package structure refactor.

postgres/postgres_literal.go

@@ -0,0 +1,27 @@
+package postgres
+
+import "github.com/go-jet/jet/internal/jet"
+
+var Bool = jet.Bool
+var Int = jet.Int
+var Float = jet.Float
+var String = jet.String
+var Date = func(year, month, day int) DateExpression {
+	return CAST(jet.Date(year, month, day)).AS_DATE()
+}
+
+var Time = func(hour, minute, second, milliseconds int) TimeExpression {
+	return CAST(jet.Time(hour, minute, second, milliseconds)).AS_TIME()
+}
+
+var Timez = func(hour, minute, second, milliseconds int, timezone int) TimezExpression {
+	return CAST(jet.Timez(hour, minute, second, milliseconds, timezone)).AS_TIMEZ()
+}
+
+var Timestamp = func(year, month, day, hour, minute, second, milliseconds int) TimestampExpression {
+	return CAST(jet.Timestamp(year, month, day, hour, minute, second, milliseconds)).AS_TIMESTAMP()
+}
+
+var Timestampz = func(year, month, day, hour, minute, second, milliseconds int, timezone int) TimestampzExpression {
+	return CAST(jet.Timestampz(year, month, day, hour, minute, second, milliseconds, timezone)).AS_TIMESTAMPZ()
+}