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