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planner: Move the Selectivity function from the stats package into ca…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| // Copyright 2023 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 cardinality | ||
|
|
||
| import ( | ||
| "github.com/pingcap/errors" | ||
| "github.com/pingcap/tidb/planner/util/debugtrace" | ||
| "github.com/pingcap/tidb/sessionctx" | ||
| "github.com/pingcap/tidb/statistics" | ||
| "github.com/pingcap/tidb/types" | ||
| "github.com/pingcap/tidb/util/ranger" | ||
| ) | ||
|
|
||
| func init() { | ||
| statistics.GetRowCountByColumnRanges = GetRowCountByColumnRanges | ||
| statistics.GetRowCountByIntColumnRanges = GetRowCountByIntColumnRanges | ||
| statistics.GetRowCountByIndexRanges = GetRowCountByIndexRanges | ||
| } | ||
|
|
||
| // GetRowCountByColumnRanges estimates the row count by a slice of Range. | ||
| func GetRowCountByColumnRanges(sctx sessionctx.Context, coll *statistics.HistColl, colID int64, colRanges []*ranger.Range) (result float64, err error) { | ||
| var name string | ||
| if sctx.GetSessionVars().StmtCtx.EnableOptimizerDebugTrace { | ||
| debugtrace.EnterContextCommon(sctx) | ||
| debugTraceGetRowCountInput(sctx, colID, colRanges) | ||
| defer func() { | ||
| debugtrace.RecordAnyValuesWithNames(sctx, "Name", name, "Result", result) | ||
| debugtrace.LeaveContextCommon(sctx) | ||
| }() | ||
| } | ||
| sc := sctx.GetSessionVars().StmtCtx | ||
| c, ok := coll.Columns[colID] | ||
| recordUsedItemStatsStatus(sctx, c, coll.PhysicalID, colID) | ||
| if c != nil && c.Info != nil { | ||
| name = c.Info.Name.O | ||
| } | ||
| if !ok || c.IsInvalid(sctx, coll.Pseudo) { | ||
| result, err = GetPseudoRowCountByColumnRanges(sc, float64(coll.RealtimeCount), colRanges, 0) | ||
| if err == nil && sc.EnableOptimizerCETrace && ok { | ||
| CETraceRange(sctx, coll.PhysicalID, []string{c.Info.Name.O}, colRanges, "Column Stats-Pseudo", uint64(result)) | ||
| } | ||
| return result, err | ||
| } | ||
| if sctx.GetSessionVars().StmtCtx.EnableOptimizerDebugTrace { | ||
| debugtrace.RecordAnyValuesWithNames(sctx, | ||
| "Histogram NotNull Count", c.Histogram.NotNullCount(), | ||
| "TopN total count", c.TopN.TotalCount(), | ||
| "Increase Factor", c.GetIncreaseFactor(coll.RealtimeCount), | ||
| ) | ||
| } | ||
| result, err = c.GetColumnRowCount(sctx, colRanges, coll.RealtimeCount, coll.ModifyCount, false) | ||
| if sc.EnableOptimizerCETrace { | ||
| CETraceRange(sctx, coll.PhysicalID, []string{c.Info.Name.O}, colRanges, "Column Stats", uint64(result)) | ||
| } | ||
| return result, errors.Trace(err) | ||
| } | ||
|
|
||
| // GetRowCountByIntColumnRanges estimates the row count by a slice of IntColumnRange. | ||
| func GetRowCountByIntColumnRanges(sctx sessionctx.Context, coll *statistics.HistColl, colID int64, intRanges []*ranger.Range) (result float64, err error) { | ||
| var name string | ||
| if sctx.GetSessionVars().StmtCtx.EnableOptimizerDebugTrace { | ||
| debugtrace.EnterContextCommon(sctx) | ||
| debugTraceGetRowCountInput(sctx, colID, intRanges) | ||
| defer func() { | ||
| debugtrace.RecordAnyValuesWithNames(sctx, "Name", name, "Result", result) | ||
| debugtrace.LeaveContextCommon(sctx) | ||
| }() | ||
| } | ||
| sc := sctx.GetSessionVars().StmtCtx | ||
| c, ok := coll.Columns[colID] | ||
| recordUsedItemStatsStatus(sctx, c, coll.PhysicalID, colID) | ||
| if c != nil && c.Info != nil { | ||
| name = c.Info.Name.O | ||
| } | ||
| if !ok || c.IsInvalid(sctx, coll.Pseudo) { | ||
| if len(intRanges) == 0 { | ||
| return 0, nil | ||
| } | ||
| if intRanges[0].LowVal[0].Kind() == types.KindInt64 { | ||
| result = getPseudoRowCountBySignedIntRanges(intRanges, float64(coll.RealtimeCount)) | ||
| } else { | ||
| result = getPseudoRowCountByUnsignedIntRanges(intRanges, float64(coll.RealtimeCount)) | ||
| } | ||
| if sc.EnableOptimizerCETrace && ok { | ||
| CETraceRange(sctx, coll.PhysicalID, []string{c.Info.Name.O}, intRanges, "Column Stats-Pseudo", uint64(result)) | ||
| } | ||
| return result, nil | ||
| } | ||
| if sctx.GetSessionVars().StmtCtx.EnableOptimizerDebugTrace { | ||
| debugtrace.RecordAnyValuesWithNames(sctx, | ||
| "Histogram NotNull Count", c.Histogram.NotNullCount(), | ||
| "TopN total count", c.TopN.TotalCount(), | ||
| "Increase Factor", c.GetIncreaseFactor(coll.RealtimeCount), | ||
| ) | ||
| } | ||
| result, err = c.GetColumnRowCount(sctx, intRanges, coll.RealtimeCount, coll.ModifyCount, true) | ||
| if sc.EnableOptimizerCETrace { | ||
| CETraceRange(sctx, coll.PhysicalID, []string{c.Info.Name.O}, intRanges, "Column Stats", uint64(result)) | ||
| } | ||
| return result, errors.Trace(err) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| // Copyright 2023 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 cardinality | ||
|
|
||
| import ( | ||
| "github.com/pingcap/errors" | ||
| "github.com/pingcap/tidb/planner/util/debugtrace" | ||
| "github.com/pingcap/tidb/sessionctx" | ||
| "github.com/pingcap/tidb/statistics" | ||
| "github.com/pingcap/tidb/util/ranger" | ||
| ) | ||
|
|
||
| // GetRowCountByIndexRanges estimates the row count by a slice of Range. | ||
| func GetRowCountByIndexRanges(sctx sessionctx.Context, coll *statistics.HistColl, idxID int64, indexRanges []*ranger.Range) (result float64, err error) { | ||
| var name string | ||
| if sctx.GetSessionVars().StmtCtx.EnableOptimizerDebugTrace { | ||
| debugtrace.EnterContextCommon(sctx) | ||
| debugTraceGetRowCountInput(sctx, idxID, indexRanges) | ||
| defer func() { | ||
| debugtrace.RecordAnyValuesWithNames(sctx, "Name", name, "Result", result) | ||
| debugtrace.LeaveContextCommon(sctx) | ||
| }() | ||
| } | ||
| sc := sctx.GetSessionVars().StmtCtx | ||
| idx, ok := coll.Indices[idxID] | ||
| colNames := make([]string, 0, 8) | ||
| if ok { | ||
| if idx.Info != nil { | ||
| name = idx.Info.Name.O | ||
| for _, col := range idx.Info.Columns { | ||
| colNames = append(colNames, col.Name.O) | ||
| } | ||
| } | ||
| } | ||
| recordUsedItemStatsStatus(sctx, idx, coll.PhysicalID, idxID) | ||
| if !ok || idx.IsInvalid(sctx, coll.Pseudo) { | ||
| colsLen := -1 | ||
| if idx != nil && idx.Info.Unique { | ||
| colsLen = len(idx.Info.Columns) | ||
| } | ||
| result, err = getPseudoRowCountByIndexRanges(sc, indexRanges, float64(coll.RealtimeCount), colsLen) | ||
| if err == nil && sc.EnableOptimizerCETrace && ok { | ||
| CETraceRange(sctx, coll.PhysicalID, colNames, indexRanges, "Index Stats-Pseudo", uint64(result)) | ||
| } | ||
| return result, err | ||
| } | ||
| if sctx.GetSessionVars().StmtCtx.EnableOptimizerDebugTrace { | ||
| debugtrace.RecordAnyValuesWithNames(sctx, | ||
| "Histogram NotNull Count", idx.Histogram.NotNullCount(), | ||
| "TopN total count", idx.TopN.TotalCount(), | ||
| "Increase Factor", idx.GetIncreaseFactor(coll.RealtimeCount), | ||
| ) | ||
| } | ||
| if idx.CMSketch != nil && idx.StatsVer == statistics.Version1 { | ||
| result, err = coll.GetIndexRowCount(sctx, idxID, indexRanges) | ||
| } else { | ||
| result, err = idx.GetRowCount(sctx, coll, indexRanges, coll.RealtimeCount, coll.ModifyCount) | ||
| } | ||
| if sc.EnableOptimizerCETrace { | ||
| CETraceRange(sctx, coll.PhysicalID, colNames, indexRanges, "Index Stats", uint64(result)) | ||
| } | ||
| return result, errors.Trace(err) | ||
| } |
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