Jet internal refactor.

postgres/clauses.go

@@ -0,0 +1,21 @@
+package postgres
+
+import (
+	"github.com/go-jet/jet/internal/jet"
+)
+
+type ClauseReturning struct {
+	Projections []jet.Projection
+}
+
+func (r *ClauseReturning) Serialize(statementType jet.StatementType, out *jet.SqlBuilder) error {
+	if len(r.Projections) == 0 {
+		return nil
+	}
+
+	out.NewLine()
+	out.WriteString("RETURNING")
+	out.IncreaseIdent()
+
+	return out.WriteProjections(statementType, r.Projections)
+}