duckdb::RelationStatisticsHelper Class Reference

Static Public Member Functions
static idx_t	InspectTableFilter (idx_t cardinality, idx_t column_index, const TableFilter &filter, BaseStatistics &base_stats)
static RelationStats	ExtractGetStats (LogicalGet &get, ClientContext &context)
	Extract Statistics from a LogicalGet.
static RelationStats	ExtractDelimGetStats (LogicalDelimGet &delim_get, ClientContext &context)
static RelationStats	ExtractDummyScanStats (LogicalDummyScan &dummy_scan, ClientContext &context)
static RelationStats	ExtractExpressionGetStats (LogicalExpressionGet &expression_get, ClientContext &context)
static RelationStats	ExtractProjectionStats (LogicalProjection &proj, RelationStats &child_stats)
	All relation extractors for blocking relations.
static RelationStats	ExtractAggregationStats (LogicalAggregate &aggr, RelationStats &child_stats)
static RelationStats	ExtractWindowStats (LogicalWindow &window, RelationStats &child_stats)
static RelationStats	ExtractEmptyResultStats (LogicalEmptyResult &empty)
static RelationStats	CombineStatsOfReorderableOperator (vector< ColumnBinding > &bindings, vector< RelationStats > relation_stats)
	Called after reordering a query plan with potentially 2+ relations.
static RelationStats	CombineStatsOfNonReorderableOperator (LogicalOperator &op, const vector< RelationStats > &child_stats)
	Called after reordering a query plan with potentially 2+ relations.
static void	CopyRelationStats (RelationStats &to, const RelationStats &from)

Static Public Attributes
static constexpr double	DEFAULT_SELECTIVITY = 0.2

Static Private Member Functions
static idx_t	GetDistinctCount (LogicalGet &get, ClientContext &context, const ColumnIndex &column_id)

Member Function Documentation

ExtractDummyScanStats()

static RelationStats duckdb::RelationStatisticsHelper::ExtractDummyScanStats ( LogicalDummyScan &  dummy_scan, ClientContext &  context  )

static

Create the statistics for a projection using the statistics of the operator that sits underneath the projection. Then also create statistics for any extra columns the projection creates.

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The documentation for this class was generated from the following file:

• external/duckdb/duckdb.hpp