forked from cockroachdb/cockroach
/
insert.go
55 lines (49 loc) · 1.54 KB
/
insert.go
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// Copyright 2015 The Cockroach Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License. See the AUTHORS file
// for names of contributors.
//
// Author: Peter Mattis (peter@cockroachlabs.com)
// This code was derived from https://github.com/youtube/vitess.
//
// Copyright 2012, Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file
package parser
import (
"bytes"
"fmt"
)
// Insert represents an INSERT statement.
type Insert struct {
Table *QualifiedName
Columns QualifiedNames
Rows SelectStatement
}
func (node *Insert) String() string {
var buf bytes.Buffer
fmt.Fprintf(&buf, "INSERT INTO %s", node.Table)
if node.Columns != nil {
fmt.Fprintf(&buf, "(%s)", node.Columns)
}
if node.DefaultValues() {
buf.WriteString(" DEFAULT VALUES")
} else {
fmt.Fprintf(&buf, " %s", node.Rows)
}
return buf.String()
}
// DefaultValues returns true iff only default values are being inserted.
func (node *Insert) DefaultValues() bool {
return node.Rows == nil
}