gitroast/vendor/github.com/pingcap/tidb/ast/ddl.go

642 lines
14 KiB
Go
Raw Normal View History

// Copyright 2015 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"
"github.com/pingcap/tidb/util/types"
)
var (
_ DDLNode = &AlterTableStmt{}
_ DDLNode = &CreateDatabaseStmt{}
_ DDLNode = &CreateIndexStmt{}
_ DDLNode = &CreateTableStmt{}
_ DDLNode = &DropDatabaseStmt{}
_ DDLNode = &DropIndexStmt{}
_ DDLNode = &DropTableStmt{}
_ DDLNode = &TruncateTableStmt{}
_ Node = &AlterTableSpec{}
_ Node = &ColumnDef{}
_ Node = &ColumnOption{}
_ Node = &ColumnPosition{}
_ Node = &Constraint{}
_ Node = &IndexColName{}
_ Node = &ReferenceDef{}
)
// CharsetOpt is used for parsing charset option from SQL.
type CharsetOpt struct {
Chs string
Col string
}
// DatabaseOptionType is the type for database options.
type DatabaseOptionType int
// Database option types.
const (
DatabaseOptionNone DatabaseOptionType = iota
DatabaseOptionCharset
DatabaseOptionCollate
)
// DatabaseOption represents database option.
type DatabaseOption struct {
Tp DatabaseOptionType
Value string
}
// CreateDatabaseStmt is a statement to create a database.
// See: https://dev.mysql.com/doc/refman/5.7/en/create-database.html
type CreateDatabaseStmt struct {
ddlNode
IfNotExists bool
Name string
Options []*DatabaseOption
}
// Accept implements Node Accept interface.
func (n *CreateDatabaseStmt) Accept(v Visitor) (Node, bool) {
newNode, skipChildren := v.Enter(n)
if skipChildren {
return v.Leave(newNode)
}
n = newNode.(*CreateDatabaseStmt)
return v.Leave(n)
}
// DropDatabaseStmt is a statement to drop a database and all tables in the database.
// See: https://dev.mysql.com/doc/refman/5.7/en/drop-database.html
type DropDatabaseStmt struct {
ddlNode
IfExists bool
Name string
}
// Accept implements Node Accept interface.
func (n *DropDatabaseStmt) Accept(v Visitor) (Node, bool) {
newNode, skipChildren := v.Enter(n)
if skipChildren {
return v.Leave(newNode)
}
n = newNode.(*DropDatabaseStmt)
return v.Leave(n)
}
// IndexColName is used for parsing index column name from SQL.
type IndexColName struct {
node
Column *ColumnName
Length int
}
// Accept implements Node Accept interface.
func (n *IndexColName) Accept(v Visitor) (Node, bool) {
newNode, skipChildren := v.Enter(n)
if skipChildren {
return v.Leave(newNode)
}
n = newNode.(*IndexColName)
node, ok := n.Column.Accept(v)
if !ok {
return n, false
}
n.Column = node.(*ColumnName)
return v.Leave(n)
}
// ReferenceDef is used for parsing foreign key reference option from SQL.
// See: http://dev.mysql.com/doc/refman/5.7/en/create-table-foreign-keys.html
type ReferenceDef struct {
node
Table *TableName
IndexColNames []*IndexColName
}
// Accept implements Node Accept interface.
func (n *ReferenceDef) Accept(v Visitor) (Node, bool) {
newNode, skipChildren := v.Enter(n)
if skipChildren {
return v.Leave(newNode)
}
n = newNode.(*ReferenceDef)
node, ok := n.Table.Accept(v)
if !ok {
return n, false
}
n.Table = node.(*TableName)
for i, val := range n.IndexColNames {
node, ok = val.Accept(v)
if !ok {
return n, false
}
n.IndexColNames[i] = node.(*IndexColName)
}
return v.Leave(n)
}
// ColumnOptionType is the type for ColumnOption.
type ColumnOptionType int
// ColumnOption types.
const (
ColumnOptionNoOption ColumnOptionType = iota
ColumnOptionPrimaryKey
ColumnOptionNotNull
ColumnOptionAutoIncrement
ColumnOptionDefaultValue
ColumnOptionUniq
ColumnOptionIndex
ColumnOptionUniqIndex
ColumnOptionKey
ColumnOptionUniqKey
ColumnOptionNull
ColumnOptionOnUpdate // For Timestamp and Datetime only.
ColumnOptionFulltext
ColumnOptionComment
)
// ColumnOption is used for parsing column constraint info from SQL.
type ColumnOption struct {
node
Tp ColumnOptionType
// The value For Default or On Update.
Expr ExprNode
}
// Accept implements Node Accept interface.
func (n *ColumnOption) Accept(v Visitor) (Node, bool) {
newNode, skipChildren := v.Enter(n)
if skipChildren {
return v.Leave(newNode)
}
n = newNode.(*ColumnOption)
if n.Expr != nil {
node, ok := n.Expr.Accept(v)
if !ok {
return n, false
}
n.Expr = node.(ExprNode)
}
return v.Leave(n)
}
// IndexOption is the index options.
// KEY_BLOCK_SIZE [=] value
// | index_type
// | WITH PARSER parser_name
// | COMMENT 'string'
// See: http://dev.mysql.com/doc/refman/5.7/en/create-table.html
type IndexOption struct {
node
KeyBlockSize uint64
Tp model.IndexType
Comment string
}
// Accept implements Node Accept interface.
func (n *IndexOption) Accept(v Visitor) (Node, bool) {
newNode, skipChildren := v.Enter(n)
if skipChildren {
return v.Leave(newNode)
}
n = newNode.(*IndexOption)
return v.Leave(n)
}
// ConstraintType is the type for Constraint.
type ConstraintType int
// ConstraintTypes
const (
ConstraintNoConstraint ConstraintType = iota
ConstraintPrimaryKey
ConstraintKey
ConstraintIndex
ConstraintUniq
ConstraintUniqKey
ConstraintUniqIndex
ConstraintForeignKey
ConstraintFulltext
)
// Constraint is constraint for table definition.
type Constraint struct {
node
Tp ConstraintType
Name string
// Used for PRIMARY KEY, UNIQUE, ......
Keys []*IndexColName
// Used for foreign key.
Refer *ReferenceDef
// Index Options
Option *IndexOption
}
// Accept implements Node Accept interface.
func (n *Constraint) Accept(v Visitor) (Node, bool) {
newNode, skipChildren := v.Enter(n)
if skipChildren {
return v.Leave(newNode)
}
n = newNode.(*Constraint)
for i, val := range n.Keys {
node, ok := val.Accept(v)
if !ok {
return n, false
}
n.Keys[i] = node.(*IndexColName)
}
if n.Refer != nil {
node, ok := n.Refer.Accept(v)
if !ok {
return n, false
}
n.Refer = node.(*ReferenceDef)
}
if n.Option != nil {
node, ok := n.Option.Accept(v)
if !ok {
return n, false
}
n.Option = node.(*IndexOption)
}
return v.Leave(n)
}
// ColumnDef is used for parsing column definition from SQL.
type ColumnDef struct {
node
Name *ColumnName
Tp *types.FieldType
Options []*ColumnOption
}
// Accept implements Node Accept interface.
func (n *ColumnDef) Accept(v Visitor) (Node, bool) {
newNode, skipChildren := v.Enter(n)
if skipChildren {
return v.Leave(newNode)
}
n = newNode.(*ColumnDef)
node, ok := n.Name.Accept(v)
if !ok {
return n, false
}
n.Name = node.(*ColumnName)
for i, val := range n.Options {
node, ok := val.Accept(v)
if !ok {
return n, false
}
n.Options[i] = node.(*ColumnOption)
}
return v.Leave(n)
}
// CreateTableStmt is a statement to create a table.
// See: https://dev.mysql.com/doc/refman/5.7/en/create-table.html
type CreateTableStmt struct {
ddlNode
IfNotExists bool
Table *TableName
Cols []*ColumnDef
Constraints []*Constraint
Options []*TableOption
}
// Accept implements Node Accept interface.
func (n *CreateTableStmt) Accept(v Visitor) (Node, bool) {
newNode, skipChildren := v.Enter(n)
if skipChildren {
return v.Leave(newNode)
}
n = newNode.(*CreateTableStmt)
node, ok := n.Table.Accept(v)
if !ok {
return n, false
}
n.Table = node.(*TableName)
for i, val := range n.Cols {
node, ok = val.Accept(v)
if !ok {
return n, false
}
n.Cols[i] = node.(*ColumnDef)
}
for i, val := range n.Constraints {
node, ok = val.Accept(v)
if !ok {
return n, false
}
n.Constraints[i] = node.(*Constraint)
}
return v.Leave(n)
}
// DropTableStmt is a statement to drop one or more tables.
// See: https://dev.mysql.com/doc/refman/5.7/en/drop-table.html
type DropTableStmt struct {
ddlNode
IfExists bool
Tables []*TableName
}
// Accept implements Node Accept interface.
func (n *DropTableStmt) Accept(v Visitor) (Node, bool) {
newNode, skipChildren := v.Enter(n)
if skipChildren {
return v.Leave(newNode)
}
n = newNode.(*DropTableStmt)
for i, val := range n.Tables {
node, ok := val.Accept(v)
if !ok {
return n, false
}
n.Tables[i] = node.(*TableName)
}
return v.Leave(n)
}
// CreateIndexStmt is a statement to create an index.
// See: https://dev.mysql.com/doc/refman/5.7/en/create-index.html
type CreateIndexStmt struct {
ddlNode
IndexName string
Table *TableName
Unique bool
IndexColNames []*IndexColName
}
// Accept implements Node Accept interface.
func (n *CreateIndexStmt) Accept(v Visitor) (Node, bool) {
newNode, skipChildren := v.Enter(n)
if skipChildren {
return v.Leave(newNode)
}
n = newNode.(*CreateIndexStmt)
node, ok := n.Table.Accept(v)
if !ok {
return n, false
}
n.Table = node.(*TableName)
for i, val := range n.IndexColNames {
node, ok = val.Accept(v)
if !ok {
return n, false
}
n.IndexColNames[i] = node.(*IndexColName)
}
return v.Leave(n)
}
// DropIndexStmt is a statement to drop the index.
// See: https://dev.mysql.com/doc/refman/5.7/en/drop-index.html
type DropIndexStmt struct {
ddlNode
IfExists bool
IndexName string
Table *TableName
}
// Accept implements Node Accept interface.
func (n *DropIndexStmt) Accept(v Visitor) (Node, bool) {
newNode, skipChildren := v.Enter(n)
if skipChildren {
return v.Leave(newNode)
}
n = newNode.(*DropIndexStmt)
node, ok := n.Table.Accept(v)
if !ok {
return n, false
}
n.Table = node.(*TableName)
return v.Leave(n)
}
// TableOptionType is the type for TableOption
type TableOptionType int
// TableOption types.
const (
TableOptionNone TableOptionType = iota
TableOptionEngine
TableOptionCharset
TableOptionCollate
TableOptionAutoIncrement
TableOptionComment
TableOptionAvgRowLength
TableOptionCheckSum
TableOptionCompression
TableOptionConnection
TableOptionPassword
TableOptionKeyBlockSize
TableOptionMaxRows
TableOptionMinRows
TableOptionDelayKeyWrite
TableOptionRowFormat
)
// RowFormat types
const (
RowFormatDefault uint64 = iota + 1
RowFormatDynamic
RowFormatFixed
RowFormatCompressed
RowFormatRedundant
RowFormatCompact
)
// TableOption is used for parsing table option from SQL.
type TableOption struct {
Tp TableOptionType
StrValue string
UintValue uint64
}
// ColumnPositionType is the type for ColumnPosition.
type ColumnPositionType int
// ColumnPosition Types
const (
ColumnPositionNone ColumnPositionType = iota
ColumnPositionFirst
ColumnPositionAfter
)
// ColumnPosition represent the position of the newly added column
type ColumnPosition struct {
node
// ColumnPositionNone | ColumnPositionFirst | ColumnPositionAfter
Tp ColumnPositionType
// RelativeColumn is the column the newly added column after if type is ColumnPositionAfter
RelativeColumn *ColumnName
}
// Accept implements Node Accept interface.
func (n *ColumnPosition) Accept(v Visitor) (Node, bool) {
newNode, skipChildren := v.Enter(n)
if skipChildren {
return v.Leave(newNode)
}
n = newNode.(*ColumnPosition)
if n.RelativeColumn != nil {
node, ok := n.RelativeColumn.Accept(v)
if !ok {
return n, false
}
n.RelativeColumn = node.(*ColumnName)
}
return v.Leave(n)
}
// AlterTableType is the type for AlterTableSpec.
type AlterTableType int
// AlterTable types.
const (
AlterTableOption AlterTableType = iota + 1
AlterTableAddColumn
AlterTableAddConstraint
AlterTableDropColumn
AlterTableDropPrimaryKey
AlterTableDropIndex
AlterTableDropForeignKey
// TODO: Add more actions
)
// AlterTableSpec represents alter table specification.
type AlterTableSpec struct {
node
Tp AlterTableType
Name string
Constraint *Constraint
Options []*TableOption
Column *ColumnDef
DropColumn *ColumnName
Position *ColumnPosition
}
// Accept implements Node Accept interface.
func (n *AlterTableSpec) Accept(v Visitor) (Node, bool) {
newNode, skipChildren := v.Enter(n)
if skipChildren {
return v.Leave(newNode)
}
n = newNode.(*AlterTableSpec)
if n.Constraint != nil {
node, ok := n.Constraint.Accept(v)
if !ok {
return n, false
}
n.Constraint = node.(*Constraint)
}
if n.Column != nil {
node, ok := n.Column.Accept(v)
if !ok {
return n, false
}
n.Column = node.(*ColumnDef)
}
if n.DropColumn != nil {
node, ok := n.DropColumn.Accept(v)
if !ok {
return n, false
}
n.DropColumn = node.(*ColumnName)
}
if n.Position != nil {
node, ok := n.Position.Accept(v)
if !ok {
return n, false
}
n.Position = node.(*ColumnPosition)
}
return v.Leave(n)
}
// AlterTableStmt is a statement to change the structure of a table.
// See: https://dev.mysql.com/doc/refman/5.7/en/alter-table.html
type AlterTableStmt struct {
ddlNode
Table *TableName
Specs []*AlterTableSpec
}
// Accept implements Node Accept interface.
func (n *AlterTableStmt) Accept(v Visitor) (Node, bool) {
newNode, skipChildren := v.Enter(n)
if skipChildren {
return v.Leave(newNode)
}
n = newNode.(*AlterTableStmt)
node, ok := n.Table.Accept(v)
if !ok {
return n, false
}
n.Table = node.(*TableName)
for i, val := range n.Specs {
node, ok = val.Accept(v)
if !ok {
return n, false
}
n.Specs[i] = node.(*AlterTableSpec)
}
return v.Leave(n)
}
// TruncateTableStmt is a statement to empty a table completely.
// See: https://dev.mysql.com/doc/refman/5.7/en/truncate-table.html
type TruncateTableStmt struct {
ddlNode
Table *TableName
}
// Accept implements Node Accept interface.
func (n *TruncateTableStmt) Accept(v Visitor) (Node, bool) {
newNode, skipChildren := v.Enter(n)
if skipChildren {
return v.Leave(newNode)
}
n = newNode.(*TruncateTableStmt)
node, ok := n.Table.Accept(v)
if !ok {
return n, false
}
n.Table = node.(*TableName)
return v.Leave(n)
}