/
alter_index.go
66 lines (55 loc) · 1.67 KB
/
alter_index.go
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// Copyright 2017 The Cockroach Authors.
//
// Use of this software is governed by the Business Source License
// included in the file licenses/BSL.txt.
//
// As of the Change Date specified in that file, in accordance with
// the Business Source License, use of this software will be governed
// by the Apache License, Version 2.0, included in the file
// licenses/APL.txt.
package ast
// AlterIndex represents an ALTER INDEX statement.
type AlterIndex struct {
IfExists bool
Index TableIndexName
Cmds AlterIndexCmds
}
var _ Statement = &AlterIndex{}
// Format implements the NodeFormatter interface.
func (node *AlterIndex) Format(ctx *FmtCtx) {
ctx.WriteString("ALTER INDEX ")
if node.IfExists {
ctx.WriteString("IF EXISTS ")
}
ctx.FormatNode(&node.Index)
ctx.FormatNode(&node.Cmds)
}
// AlterIndexCmds represents a list of index alterations.
type AlterIndexCmds []AlterIndexCmd
// Format implements the NodeFormatter interface.
func (node *AlterIndexCmds) Format(ctx *FmtCtx) {
for i, n := range *node {
if i > 0 {
ctx.WriteString(",")
}
ctx.FormatNode(n)
}
}
// AlterIndexCmd represents an index modification operation.
type AlterIndexCmd interface {
NodeFormatter
// Placeholder function to ensure that only desired types
// (AlterIndex*) conform to the AlterIndexCmd interface.
alterIndexCmd()
}
func (*AlterIndexPartitionBy) alterIndexCmd() {}
var _ AlterIndexCmd = &AlterIndexPartitionBy{}
// AlterIndexPartitionBy represents an ALTER INDEX PARTITION BY
// command.
type AlterIndexPartitionBy struct {
*PartitionBy
}
// Format implements the NodeFormatter interface.
func (node *AlterIndexPartitionBy) Format(ctx *FmtCtx) {
ctx.FormatNode(node.PartitionBy)
}