90 lines
3.2 KiB
Go
90 lines
3.2 KiB
Go
// Copyright 2024 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,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package contextimpl
|
|
|
|
import (
|
|
exprctx "github.com/pingcap/tidb/pkg/expression/context"
|
|
"github.com/pingcap/tidb/pkg/parser/model"
|
|
"github.com/pingcap/tidb/pkg/sessionctx"
|
|
"github.com/pingcap/tidb/pkg/sessionctx/variable"
|
|
"github.com/pingcap/tidb/pkg/table/context"
|
|
"github.com/pingcap/tidb/pkg/util/tableutil"
|
|
"github.com/pingcap/tipb/go-binlog"
|
|
)
|
|
|
|
var _ context.MutateContext = &TableContextImpl{}
|
|
var _ context.AllocatorContext = &TableContextImpl{}
|
|
|
|
// TableContextImpl is used to provide context for table operations.
|
|
type TableContextImpl struct {
|
|
sessionctx.Context
|
|
// mutateBuffers is a memory pool for table related memory allocation that aims to reuse memory
|
|
// and saves allocation
|
|
// The buffers are supposed to be used inside AddRecord/UpdateRecord/RemoveRecord.
|
|
mutateBuffers *context.MutateBuffers
|
|
}
|
|
|
|
// NewTableContextImpl creates a new TableContextImpl.
|
|
func NewTableContextImpl(sctx sessionctx.Context) *TableContextImpl {
|
|
return &TableContextImpl{
|
|
Context: sctx,
|
|
mutateBuffers: context.NewMutateBuffers(sctx.GetSessionVars().GetWriteStmtBufs()),
|
|
}
|
|
}
|
|
|
|
// TxnRecordTempTable record the temporary table to the current transaction.
|
|
// This method will be called when the temporary table is modified in the transaction.
|
|
func (ctx *TableContextImpl) TxnRecordTempTable(tbl *model.TableInfo) tableutil.TempTable {
|
|
return ctx.vars().GetTemporaryTable(tbl)
|
|
}
|
|
|
|
// GetExprCtx returns the ExprContext
|
|
func (ctx *TableContextImpl) GetExprCtx() exprctx.ExprContext {
|
|
return ctx.Context.GetExprCtx()
|
|
}
|
|
|
|
// InRestrictedSQL returns whether the current context is used in restricted SQL.
|
|
func (ctx *TableContextImpl) InRestrictedSQL() bool {
|
|
return ctx.vars().StmtCtx.InRestrictedSQL
|
|
}
|
|
|
|
// BinlogEnabled returns whether the binlog is enabled.
|
|
func (ctx *TableContextImpl) BinlogEnabled() bool {
|
|
return ctx.vars().BinlogClient != nil
|
|
}
|
|
|
|
// GetBinlogMutation returns a `binlog.TableMutation` object for a table.
|
|
func (ctx *TableContextImpl) GetBinlogMutation(tblID int64) *binlog.TableMutation {
|
|
return ctx.Context.StmtGetMutation(tblID)
|
|
}
|
|
|
|
// GetRowEncodingConfig returns the RowEncodingConfig.
|
|
func (ctx *TableContextImpl) GetRowEncodingConfig() context.RowEncodingConfig {
|
|
vars := ctx.vars()
|
|
return context.RowEncodingConfig{
|
|
IsRowLevelChecksumEnabled: vars.IsRowLevelChecksumEnabled(),
|
|
RowEncoder: &vars.RowEncoder,
|
|
}
|
|
}
|
|
|
|
// GetMutateBuffers implements the MutateContext interface.
|
|
func (ctx *TableContextImpl) GetMutateBuffers() *context.MutateBuffers {
|
|
return ctx.mutateBuffers
|
|
}
|
|
|
|
func (ctx *TableContextImpl) vars() *variable.SessionVars {
|
|
return ctx.Context.GetSessionVars()
|
|
}
|