120 lines
2.8 KiB
Go
120 lines
2.8 KiB
Go
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// Copyright 2015 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ast
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import "github.com/pingcap/tidb/util/types"
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// node is the struct implements node interface except for Accept method.
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// Node implementations should embed it in.
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type node struct {
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text string
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}
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// SetText implements Node interface.
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func (n *node) SetText(text string) {
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n.text = text
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}
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// Text implements Node interface.
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func (n *node) Text() string {
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return n.text
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}
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// stmtNode implements StmtNode interface.
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// Statement implementations should embed it in.
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type stmtNode struct {
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node
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}
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// statement implements StmtNode interface.
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func (sn *stmtNode) statement() {}
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// ddlNode implements DDLNode interface.
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// DDL implementations should embed it in.
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type ddlNode struct {
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stmtNode
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}
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// ddlStatement implements DDLNode interface.
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func (dn *ddlNode) ddlStatement() {}
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// dmlNode is the struct implements DMLNode interface.
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// DML implementations should embed it in.
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type dmlNode struct {
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stmtNode
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}
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// dmlStatement implements DMLNode interface.
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func (dn *dmlNode) dmlStatement() {}
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// expressionNode is the struct implements Expression interface.
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// Expression implementations should embed it in.
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type exprNode struct {
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node
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types.Datum
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Type *types.FieldType
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flag uint64
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}
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// SetDatum implements Expression interface.
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func (en *exprNode) SetDatum(datum types.Datum) {
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en.Datum = datum
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}
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// GetDatum implements Expression interface.
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func (en *exprNode) GetDatum() *types.Datum {
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return &en.Datum
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}
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// SetType implements Expression interface.
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func (en *exprNode) SetType(tp *types.FieldType) {
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en.Type = tp
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}
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// GetType implements Expression interface.
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func (en *exprNode) GetType() *types.FieldType {
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return en.Type
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}
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// SetFlag implements Expression interface.
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func (en *exprNode) SetFlag(flag uint64) {
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en.flag = flag
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}
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// GetFlag implements Expression interface.
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func (en *exprNode) GetFlag() uint64 {
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return en.flag
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}
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type funcNode struct {
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exprNode
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}
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// FunctionExpression implements FounctionNode interface.
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func (fn *funcNode) functionExpression() {}
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type resultSetNode struct {
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resultFields []*ResultField
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}
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// GetResultFields implements ResultSetNode interface.
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func (rs *resultSetNode) GetResultFields() []*ResultField {
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return rs.resultFields
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}
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// GetResultFields implements ResultSetNode interface.
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func (rs *resultSetNode) SetResultFields(rfs []*ResultField) {
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rs.resultFields = rfs
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}
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