forgejo-federation/vendor/github.com/pingcap/tidb/ast/base.go

120 lines
2.8 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/util/types"
// node is the struct implements node interface except for Accept method.
// Node implementations should embed it in.
type node struct {
text string
}
// SetText implements Node interface.
func (n *node) SetText(text string) {
n.text = text
}
// Text implements Node interface.
func (n *node) Text() string {
return n.text
}
// stmtNode implements StmtNode interface.
// Statement implementations should embed it in.
type stmtNode struct {
node
}
// statement implements StmtNode interface.
func (sn *stmtNode) statement() {}
// ddlNode implements DDLNode interface.
// DDL implementations should embed it in.
type ddlNode struct {
stmtNode
}
// ddlStatement implements DDLNode interface.
func (dn *ddlNode) ddlStatement() {}
// dmlNode is the struct implements DMLNode interface.
// DML implementations should embed it in.
type dmlNode struct {
stmtNode
}
// dmlStatement implements DMLNode interface.
func (dn *dmlNode) dmlStatement() {}
// expressionNode is the struct implements Expression interface.
// Expression implementations should embed it in.
type exprNode struct {
node
types.Datum
Type *types.FieldType
flag uint64
}
// SetDatum implements Expression interface.
func (en *exprNode) SetDatum(datum types.Datum) {
en.Datum = datum
}
// GetDatum implements Expression interface.
func (en *exprNode) GetDatum() *types.Datum {
return &en.Datum
}
// SetType implements Expression interface.
func (en *exprNode) SetType(tp *types.FieldType) {
en.Type = tp
}
// GetType implements Expression interface.
func (en *exprNode) GetType() *types.FieldType {
return en.Type
}
// SetFlag implements Expression interface.
func (en *exprNode) SetFlag(flag uint64) {
en.flag = flag
}
// GetFlag implements Expression interface.
func (en *exprNode) GetFlag() uint64 {
return en.flag
}
type funcNode struct {
exprNode
}
// FunctionExpression implements FounctionNode interface.
func (fn *funcNode) functionExpression() {}
type resultSetNode struct {
resultFields []*ResultField
}
// GetResultFields implements ResultSetNode interface.
func (rs *resultSetNode) GetResultFields() []*ResultField {
return rs.resultFields
}
// GetResultFields implements ResultSetNode interface.
func (rs *resultSetNode) SetResultFields(rfs []*ResultField) {
rs.resultFields = rfs
}