Literal expressions clean up.

postgres/types.go

@@ -0,0 +1,16 @@
+package postgres
+
+import "github.com/go-jet/jet/internal/jet"
+
+type Statement jet.Statement
+type Projection jet.Projection
+
+func toJetProjectionList(projections []Projection) []jet.Projection {
+	ret := []jet.Projection{}
+
+	for _, projection := range projections {
+		ret = append(ret, projection)
+	}
+
+	return ret
+}