74 lines
1.9 KiB
Go
74 lines
1.9 KiB
Go
// Copyright 2013 The ql Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSES/QL-LICENSE file.
|
|
|
|
// 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 stmt
|
|
|
|
import (
|
|
"github.com/pingcap/tidb/context"
|
|
"github.com/pingcap/tidb/rset"
|
|
"github.com/pingcap/tidb/util/format"
|
|
)
|
|
|
|
// Statement is an interface for SQL execution.
|
|
// NOTE: all Statement implementations must be safe for
|
|
// concurrent using by multiple goroutines.
|
|
// If the Exec method requires any Execution domain local data,
|
|
// they must be held out of the implementing instance.
|
|
type Statement interface {
|
|
// Explain gets the execution plans.
|
|
Explain(ctx context.Context, w format.Formatter)
|
|
|
|
// IsDDL shows whether the statement is an DDL operation.
|
|
IsDDL() bool
|
|
|
|
// OriginText gets the origin SQL text.
|
|
OriginText() string
|
|
|
|
// SetText sets the executive SQL text.
|
|
SetText(text string)
|
|
|
|
// Exec executes SQL and gets a Recordset.
|
|
Exec(ctx context.Context) (rset.Recordset, error)
|
|
}
|
|
|
|
// Show statement types.
|
|
const (
|
|
ShowNone = iota
|
|
ShowEngines
|
|
ShowDatabases
|
|
ShowTables
|
|
ShowTableStatus
|
|
ShowColumns
|
|
ShowWarnings
|
|
ShowCharset
|
|
ShowVariables
|
|
ShowStatus
|
|
ShowCollation
|
|
ShowCreateTable
|
|
ShowGrants
|
|
ShowTriggers
|
|
ShowProcedureStatus
|
|
ShowIndex
|
|
)
|
|
|
|
const (
|
|
// SessionScope shows varibales in session scope.
|
|
SessionScope = iota
|
|
// GlobalScope shows varibales in global scope.
|
|
GlobalScope
|
|
)
|