tidb partition_table 源码
tidb partition_table 代码
文件路径：/executor/partition_table.go
// Copyright 2020 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 executor
import (
"context"
"fmt"
"github.com/pingcap/errors"
"github.com/pingcap/tipb/go-tipb"
)
func updateExecutorTableID(ctx context.Context, exec *tipb.Executor, recursive bool, partitionIDs []int64) error {
var child *tipb.Executor
switch exec.Tp {
case tipb.ExecType_TypeTableScan:
exec.TblScan.TableId = partitionIDs[0]
// For test coverage.
if tmp := ctx.Value("nextPartitionUpdateDAGReq"); tmp != nil {
m := tmp.(map[int64]struct{})
m[partitionIDs[0]] = struct{}{}
}
case tipb.ExecType_TypePartitionTableScan:
exec.PartitionTableScan.PartitionIds = partitionIDs
case tipb.ExecType_TypeIndexScan:
exec.IdxScan.TableId = partitionIDs[0]
case tipb.ExecType_TypeSelection:
child = exec.Selection.Child
case tipb.ExecType_TypeAggregation, tipb.ExecType_TypeStreamAgg:
child = exec.Aggregation.Child
case tipb.ExecType_TypeTopN:
child = exec.TopN.Child
case tipb.ExecType_TypeLimit:
child = exec.Limit.Child
case tipb.ExecType_TypeExchangeSender:
child = exec.ExchangeSender.Child
case tipb.ExecType_TypeExchangeReceiver:
child = nil
case tipb.ExecType_TypeJoin:
child = exec.Join.Children[1-exec.Join.InnerIdx]
case tipb.ExecType_TypeProjection:
child = exec.Projection.Child
case tipb.ExecType_TypeWindow:
child = exec.Window.Child
case tipb.ExecType_TypeSort:
child = exec.Sort.Child
default:
return errors.Trace(fmt.Errorf("unknown new tipb protocol %d", exec.Tp))
}
if child != nil && recursive {
return updateExecutorTableID(ctx, child, recursive, partitionIDs)
}
return nil
}
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