73 lines
2.8 KiB
Go
73 lines
2.8 KiB
Go
// Copyright 2023 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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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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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 usage
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import (
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"time"
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"github.com/pingcap/tidb/pkg/meta/model"
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"github.com/pingcap/tidb/pkg/sessionctx"
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statstypes "github.com/pingcap/tidb/pkg/statistics/handle/types"
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"github.com/pingcap/tidb/pkg/statistics/handle/usage/indexusage"
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"github.com/pingcap/tidb/pkg/statistics/handle/usage/predicatecolumn"
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utilstats "github.com/pingcap/tidb/pkg/statistics/handle/util"
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)
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// statsUsageImpl implements statstypes.StatsUsage.
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type statsUsageImpl struct {
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statsHandle statstypes.StatsHandle
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// idxUsageCollector contains all the index usage collectors required by session.
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idxUsageCollector *indexusage.Collector
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// SessionStatsList contains all the stats collector required by session.
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*SessionStatsList
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}
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// NewStatsUsageImpl creates a statstypes.StatsUsage.
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func NewStatsUsageImpl(statsHandle statstypes.StatsHandle) statstypes.StatsUsage {
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return &statsUsageImpl{
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statsHandle: statsHandle,
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idxUsageCollector: indexusage.NewCollector(),
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SessionStatsList: NewSessionStatsList()}
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}
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// LoadColumnStatsUsage returns all columns' usage information.
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func (u *statsUsageImpl) LoadColumnStatsUsage(loc *time.Location) (colStatsMap map[model.TableItemID]statstypes.ColStatsTimeInfo, err error) {
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err = utilstats.CallWithSCtx(u.statsHandle.SPool(), func(sctx sessionctx.Context) error {
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colStatsMap, err = predicatecolumn.LoadColumnStatsUsage(sctx, loc)
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return err
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})
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return
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}
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// GetPredicateColumns returns IDs of predicate columns, which are the columns whose stats are used(needed) when generating query plans.
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func (u *statsUsageImpl) GetPredicateColumns(tableID int64) (columnIDs []int64, err error) {
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err = utilstats.CallWithSCtx(u.statsHandle.SPool(), func(sctx sessionctx.Context) error {
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columnIDs, err = predicatecolumn.GetPredicateColumns(sctx, tableID)
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return err
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}, utilstats.FlagWrapTxn)
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return
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}
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// CollectColumnsInExtendedStats returns IDs of the columns involved in extended stats.
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func (u *statsUsageImpl) CollectColumnsInExtendedStats(tableID int64) (columnIDs []int64, err error) {
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err = utilstats.CallWithSCtx(u.statsHandle.SPool(), func(sctx sessionctx.Context) error {
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columnIDs, err = predicatecolumn.CollectColumnsInExtendedStats(sctx, tableID)
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return err
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})
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return
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}
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