Postgres refactor.

postgres/delete_statement.go

@@ -0,0 +1,41 @@
+package postgres
+
+import "github.com/go-jet/jet/internal/jet"
+
+type DeleteStatement interface {
+	jet.Statement
+
+	WHERE(expression BoolExpression) DeleteStatement
+
+	RETURNING(projections ...jet.Projection) DeleteStatement
+}
+
+type deleteStatementImpl struct {
+	jet.StatementImpl
+
+	Delete    jet.ClauseStatementBegin
+	Where     jet.ClauseWhere
+	Returning jet.ClauseReturning
+}
+
+func newDeleteStatement(table WritableTable) DeleteStatement {
+	newDelete := &deleteStatementImpl{}
+	newDelete.StatementImpl = jet.NewStatementImpl(Dialect, jet.DeleteStatementType, newDelete, &newDelete.Delete,
+		&newDelete.Where, &newDelete.Returning)
+
+	newDelete.Delete.Name = "DELETE FROM"
+	newDelete.Delete.Tables = append(newDelete.Delete.Tables, table)
+	newDelete.Where.Mandatory = true
+
+	return newDelete
+}
+
+func (d *deleteStatementImpl) WHERE(expression BoolExpression) DeleteStatement {
+	d.Where.Condition = expression
+	return d
+}
+
+func (d *deleteStatementImpl) RETURNING(projections ...jet.Projection) DeleteStatement {
+	d.Returning.Projections = projections
+	return d
+}