You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 

50 lines
1.6 KiB

// Copyright 2019 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 (
"context"
plannercore "github.com/pingcap/tidb/planner/core"
"github.com/pingcap/tidb/sessionctx"
"github.com/pingcap/tidb/util/chunk"
"github.com/pingcap/tidb/util/set"
"github.com/pingcap/tidb/util/sqlexec"
)
// ReloadOptRuleBlacklistExec indicates ReloadOptRuleBlacklist executor.
type ReloadOptRuleBlacklistExec struct {
baseExecutor
}
// Next implements the Executor Next interface.
func (e *ReloadOptRuleBlacklistExec) Next(ctx context.Context, _ *chunk.Chunk) error {
return LoadOptRuleBlacklist(e.ctx)
}
// LoadOptRuleBlacklist loads the latest data from table mysql.opt_rule_blacklist.
func LoadOptRuleBlacklist(ctx sessionctx.Context) (err error) {
sql := "select HIGH_PRIORITY name from mysql.opt_rule_blacklist"
rows, _, err := ctx.(sqlexec.RestrictedSQLExecutor).ExecRestrictedSQL(sql)
if err != nil {
return err
}
newDisabledLogicalRules := set.NewStringSet()
for _, row := range rows {
name := row.GetString(0)
newDisabledLogicalRules.Insert(name)
}
plannercore.DefaultDisabledLogicalRulesList.Store(newDisabledLogicalRules)
return nil
}