0af8520a78
Makes using session variable easier and faster. Prepare for use session variable to handle data truncated error.
68 lines
1.7 KiB
Go
68 lines
1.7 KiB
Go
// 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 context
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import (
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"fmt"
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"github.com/pingcap/tidb/kv"
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"github.com/pingcap/tidb/sessionctx/variable"
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)
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// Context is an interface for transaction and executive args environment.
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type Context interface {
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// GetTxn gets a transaction for further execution.
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GetTxn(forceNew bool) (kv.Transaction, error)
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// GetClient gets a kv.Client.
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GetClient() kv.Client
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// RollbackTxn rolls back the current transaction.
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RollbackTxn() error
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// CommitTxn commits the current transaction.
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CommitTxn() error
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// SetValue saves a value associated with this context for key.
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SetValue(key fmt.Stringer, value interface{})
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// Value returns the value associated with this context for key.
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Value(key fmt.Stringer) interface{}
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// ClearValue clears the value associated with this context for key.
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ClearValue(key fmt.Stringer)
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GetSessionVars() *variable.SessionVars
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}
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type basicCtxType int
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func (t basicCtxType) String() string {
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switch t {
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case QueryString:
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return "query_string"
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case Initing:
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return "initing"
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}
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return "unknown"
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}
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// Context keys.
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const (
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// QueryString is the key for original query string.
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QueryString basicCtxType = 1
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// Initing is the key for indicating if the server is running bootstrap or upgrad job.
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Initing basicCtxType = 2
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)
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