467a01a2d0
* plan, executor: support drop stats * ast: add comment * address comment * address comment
69 lines
1.6 KiB
Go
69 lines
1.6 KiB
Go
// Copyright 2017 PingCAP, Inc.
|
|
//
|
|
// 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,
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package ast
|
|
|
|
import "github.com/pingcap/tidb/model"
|
|
|
|
var (
|
|
_ StmtNode = &AnalyzeTableStmt{}
|
|
_ StmtNode = &DropStatsStmt{}
|
|
)
|
|
|
|
// AnalyzeTableStmt is used to create table statistics.
|
|
type AnalyzeTableStmt struct {
|
|
stmtNode
|
|
|
|
TableNames []*TableName
|
|
IndexNames []model.CIStr
|
|
}
|
|
|
|
// Accept implements Node Accept interface.
|
|
func (n *AnalyzeTableStmt) Accept(v Visitor) (Node, bool) {
|
|
newNode, skipChildren := v.Enter(n)
|
|
if skipChildren {
|
|
return v.Leave(newNode)
|
|
}
|
|
n = newNode.(*AnalyzeTableStmt)
|
|
for i, val := range n.TableNames {
|
|
node, ok := val.Accept(v)
|
|
if !ok {
|
|
return n, false
|
|
}
|
|
n.TableNames[i] = node.(*TableName)
|
|
}
|
|
return v.Leave(n)
|
|
}
|
|
|
|
// DropStatsStmt is used to drop table statistics.
|
|
type DropStatsStmt struct {
|
|
stmtNode
|
|
|
|
Table *TableName
|
|
}
|
|
|
|
// Accept implements Node Accept interface.
|
|
func (n *DropStatsStmt) Accept(v Visitor) (Node, bool) {
|
|
newNode, skipChildren := v.Enter(n)
|
|
if skipChildren {
|
|
return v.Leave(newNode)
|
|
}
|
|
n = newNode.(*DropStatsStmt)
|
|
node, ok := n.Table.Accept(v)
|
|
if !ok {
|
|
return n, false
|
|
}
|
|
n.Table = node.(*TableName)
|
|
return v.Leave(n)
|
|
}
|