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statistics

package

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Versions in this module

v1

v1.0.9

Apr 20, 2018

v1.0.7

Jan 19, 2018

v1.0.6

Jan 8, 2018

v1.0.5

Dec 26, 2017

Changes in this version

type Handle

+ func (h *Handle) InitStats(is infoschema.InfoSchema) error

v1.0.4

Dec 11, 2017

v1.0.0

Oct 16, 2017

Changes in this version

+ const StatsOwnerKey

+ const StatsPrompt

+ func FMSketchToProto(s *FMSketch) *tipb.FMSketch

+ func HistogramToProto(hg *Histogram) *tipb.Histogram

+ func SampleCollectorToProto(c *SampleCollector) *tipb.SampleCollector

+ type AnalyzeResult struct

+ Count int64

+ Err error

+ Hist []*Histogram

+ IsIndex int

+ TableID int64

+ type Bucket struct

+ Count int64

+ LowerBound types.Datum

+ Repeats int64

+ UpperBound types.Datum

+ type Column struct

+ Info *model.ColumnInfo

+ func (c *Column) String() string

+ type FMSketch struct

+ func FMSketchFromProto(protoSketch *tipb.FMSketch) *FMSketch

+ func NewFMSketch(maxSize int) *FMSketch

+ func (s *FMSketch) InsertValue(value types.Datum) error

+ func (s *FMSketch) NDV() int64

+ type Handle struct

+ LastVersion uint64

+ Lease time.Duration

+ PrevLastVersion uint64

+ func NewHandle(ctx context.Context, lease time.Duration) *Handle

+ func (h *Handle) AnalyzeResultCh() chan *AnalyzeResult

+ func (h *Handle) Clear()

+ func (h *Handle) DDLEventCh() chan *ddl.Event

+ func (h *Handle) DeleteTableStatsFromKV(id int64) error

+ func (h *Handle) DumpStatsDeltaToKV()

+ func (h *Handle) GetTableStats(tblID int64) *Table

+ func (h *Handle) HandleAutoAnalyze(is infoschema.InfoSchema) error

+ func (h *Handle) HandleDDLEvent(t *ddl.Event) error

+ func (h *Handle) NewSessionStatsCollector() *SessionStatsCollector

+ func (h *Handle) Update(is infoschema.InfoSchema) error

+ func (h *Handle) UpdateTableStats(tables []*Table, deletedIDs []int64)

+ type Histogram struct

+ Buckets []Bucket

+ ID int64

+ LastUpdateVersion uint64

+ NDV int64

+ NullCount int64

+ func BuildColumn(ctx context.Context, numBuckets, id int64, collector *SampleCollector) (*Histogram, error)

+ func BuildIndex(ctx context.Context, numBuckets, id int64, records ast.RecordSet) (int64, *Histogram, error)

+ func HistogramFromProto(protoHg *tipb.Histogram) *Histogram

+ func MergeHistograms(sc *variable.StatementContext, lh *Histogram, rh *Histogram, bucketSize int) (*Histogram, error)

+ func (hg *Histogram) SaveToStorage(ctx context.Context, tableID int64, count int64, isIndex int) error

+ type Index struct

+ Info *model.IndexInfo

+ func (idx *Index) String() string

+ type SampleBuilder struct

+ ColLen int

+ MaxBucketSize int64

+ MaxSampleSize int64

+ MaxSketchSize int64

+ PkID int64

+ RecordSet ast.RecordSet

+ Sc *variable.StatementContext

+ func (s SampleBuilder) CollectSamplesAndEstimateNDVs() ([]*SampleCollector, *SortedBuilder, error)

+ type SampleCollector struct

+ Count int64

+ IsMerger bool

+ MaxSampleSize int64

+ NullCount int64

+ Samples []types.Datum

+ Sketch *FMSketch

+ func SampleCollectorFromProto(collector *tipb.SampleCollector) *SampleCollector

+ func (c *SampleCollector) MergeSampleCollector(rc *SampleCollector)

+ type SessionStatsCollector struct

+ func (s *SessionStatsCollector) Delete()

+ func (s *SessionStatsCollector) Update(id int64, delta int64, count int64)

+ type SortedBuilder struct

+ Count int64

+ func NewSortedBuilder(sc *variable.StatementContext, numBuckets, id int64) *SortedBuilder

+ func (b *SortedBuilder) Hist() *Histogram

+ func (b *SortedBuilder) Iterate(data types.Datum) error

+ type Table struct

+ Columns map[int64]*Column

+ Count int64

+ Indices map[int64]*Index

+ ModifyCount int64

+ Pseudo bool

+ TableID int64

+ Version uint64

+ func PseudoTable(tableID int64) *Table

+ func (t *Table) ColumnBetweenRowCount(sc *variable.StatementContext, a, b types.Datum, colInfo *model.ColumnInfo) (float64, error)

+ func (t *Table) ColumnEqualRowCount(sc *variable.StatementContext, value types.Datum, colInfo *model.ColumnInfo) (float64, error)

+ func (t *Table) ColumnGreaterRowCount(sc *variable.StatementContext, value types.Datum, colInfo *model.ColumnInfo) (float64, error)

+ func (t *Table) ColumnIsInvalid(colInfo *model.ColumnInfo) bool

+ func (t *Table) ColumnLessRowCount(sc *variable.StatementContext, value types.Datum, colInfo *model.ColumnInfo) (float64, error)

+ func (t *Table) GetRowCountByColumnRanges(sc *variable.StatementContext, colID int64, colRanges []*types.ColumnRange) (float64, error)

+ func (t *Table) GetRowCountByIndexRanges(sc *variable.StatementContext, idxID int64, indexRanges []*types.IndexRange) (float64, error)

+ func (t *Table) GetRowCountByIntColumnRanges(sc *variable.StatementContext, colID int64, intRanges []types.IntColumnRange) (float64, error)

+ func (t *Table) Selectivity(ctx context.Context, exprs []expression.Expression) (float64, error)

+ func (t *Table) String() string