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rename.go
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rename.go
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// Copyright 2014 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.
// 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"
// RenameDatabase represents a RENAME DATABASE statement.
type RenameDatabase struct {
Name Name
NewName Name
}
// Format implements the NodeFormatter interface.
func (node *RenameDatabase) Format(buf *bytes.Buffer, f FmtFlags) {
buf.WriteString("ALTER DATABASE ")
FormatNode(buf, f, node.Name)
buf.WriteString(" RENAME TO ")
FormatNode(buf, f, node.NewName)
}
// RenameTable represents a RENAME TABLE or RENAME VIEW statement.
// Whether the user has asked to rename a table or view is indicated
// by the IsView field.
type RenameTable struct {
Name NormalizableTableName
NewName NormalizableTableName
IfExists bool
IsView bool
}
// Format implements the NodeFormatter interface.
func (node *RenameTable) Format(buf *bytes.Buffer, f FmtFlags) {
if node.IsView {
buf.WriteString("ALTER VIEW ")
} else {
buf.WriteString("ALTER TABLE ")
}
if node.IfExists {
buf.WriteString("IF EXISTS ")
}
FormatNode(buf, f, &node.Name)
buf.WriteString(" RENAME TO ")
FormatNode(buf, f, &node.NewName)
}
// RenameIndex represents a RENAME INDEX statement.
type RenameIndex struct {
Index *TableNameWithIndex
NewName Name
IfExists bool
}
// Format implements the NodeFormatter interface.
func (node *RenameIndex) Format(buf *bytes.Buffer, f FmtFlags) {
buf.WriteString("ALTER INDEX ")
if node.IfExists {
buf.WriteString("IF EXISTS ")
}
FormatNode(buf, f, node.Index)
buf.WriteString(" RENAME TO ")
FormatNode(buf, f, node.NewName)
}
// RenameColumn represents a RENAME COLUMN statement.
type RenameColumn struct {
Table NormalizableTableName
Name Name
NewName Name
// IfExists refers to the table, not the column.
IfExists bool
}
// Format implements the NodeFormatter interface.
func (node *RenameColumn) Format(buf *bytes.Buffer, f FmtFlags) {
buf.WriteString("ALTER TABLE ")
if node.IfExists {
buf.WriteString("IF EXISTS ")
}
FormatNode(buf, f, &node.Table)
buf.WriteString(" RENAME COLUMN ")
FormatNode(buf, f, node.Name)
buf.WriteString(" TO ")
FormatNode(buf, f, node.NewName)
}