124 lines
2.6 KiB
Go
124 lines
2.6 KiB
Go
// 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 executor
|
|
|
|
import (
|
|
"github.com/juju/errors"
|
|
"github.com/pingcap/tidb/ast"
|
|
"github.com/pingcap/tidb/context"
|
|
"github.com/pingcap/tidb/expression"
|
|
"github.com/pingcap/tidb/infoschema"
|
|
"github.com/pingcap/tidb/model"
|
|
"github.com/pingcap/tidb/plan"
|
|
)
|
|
|
|
// recordSet wraps an executor, implements ast.RecordSet interface
|
|
type recordSet struct {
|
|
fields []*ast.ResultField
|
|
executor Executor
|
|
schema expression.Schema
|
|
}
|
|
|
|
func (a *recordSet) Fields() ([]*ast.ResultField, error) {
|
|
if len(a.fields) == 0 {
|
|
for _, col := range a.schema {
|
|
rf := &ast.ResultField{
|
|
ColumnAsName: col.ColName,
|
|
TableAsName: col.TblName,
|
|
DBName: col.DBName,
|
|
Column: &model.ColumnInfo{
|
|
FieldType: *col.RetType,
|
|
Name: col.ColName,
|
|
},
|
|
}
|
|
a.fields = append(a.fields, rf)
|
|
}
|
|
}
|
|
return a.fields, nil
|
|
}
|
|
|
|
func (a *recordSet) Next() (*ast.Row, error) {
|
|
row, err := a.executor.Next()
|
|
if err != nil || row == nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
return &ast.Row{Data: row.Data}, nil
|
|
}
|
|
|
|
func (a *recordSet) Close() error {
|
|
return a.executor.Close()
|
|
}
|
|
|
|
type statement struct {
|
|
is infoschema.InfoSchema
|
|
plan plan.Plan
|
|
text string
|
|
isDDL bool
|
|
}
|
|
|
|
func (a *statement) OriginText() string {
|
|
return a.text
|
|
}
|
|
|
|
func (a *statement) SetText(text string) {
|
|
a.text = text
|
|
return
|
|
}
|
|
|
|
func (a *statement) IsDDL() bool {
|
|
return a.isDDL
|
|
}
|
|
|
|
func (a *statement) Exec(ctx context.Context) (ast.RecordSet, error) {
|
|
b := newExecutorBuilder(ctx, a.is)
|
|
e := b.build(a.plan)
|
|
if b.err != nil {
|
|
return nil, errors.Trace(b.err)
|
|
}
|
|
|
|
if executorExec, ok := e.(*ExecuteExec); ok {
|
|
err := executorExec.Build()
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
e = executorExec.StmtExec
|
|
}
|
|
|
|
if len(e.Fields()) == 0 && len(e.Schema()) == 0 {
|
|
// No result fields means no Recordset.
|
|
defer e.Close()
|
|
for {
|
|
row, err := e.Next()
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
if row == nil {
|
|
return nil, nil
|
|
}
|
|
}
|
|
}
|
|
|
|
fs := e.Fields()
|
|
for _, f := range fs {
|
|
if len(f.ColumnAsName.O) == 0 {
|
|
f.ColumnAsName = f.Column.Name
|
|
}
|
|
}
|
|
return &recordSet{
|
|
executor: e,
|
|
fields: fs,
|
|
schema: e.Schema(),
|
|
}, nil
|
|
}
|