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70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* extended_stats_internal.h
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* POSTGRES extended statistics internal declarations
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*
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* Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* src/include/statistics/extended_stats_internal.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef EXTENDED_STATS_INTERNAL_H
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#define EXTENDED_STATS_INTERNAL_H
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#include "utils/sortsupport.h"
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#include "statistics/statistics.h"
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typedef struct
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{
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Oid eqopr; /* '=' operator for datatype, if any */
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Oid eqfunc; /* and associated function */
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Oid ltopr; /* '<' operator for datatype, if any */
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} StdAnalyzeData;
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typedef struct
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{
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Datum value; /* a data value */
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int tupno; /* position index for tuple it came from */
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} ScalarItem;
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/* multi-sort */
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typedef struct MultiSortSupportData
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{
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int ndims; /* number of dimensions supported by the */
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SortSupportData ssup[1]; /* sort support data for each dimension */
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} MultiSortSupportData;
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typedef MultiSortSupportData *MultiSortSupport;
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typedef struct SortItem
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{
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Datum *values;
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bool *isnull;
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} SortItem;
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extern MVNDistinct *statext_ndistinct_build(double totalrows,
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int numrows, HeapTuple *rows,
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Bitmapset *attrs, VacAttrStats **stats);
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extern bytea *statext_ndistinct_serialize(MVNDistinct *ndistinct);
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extern MVNDistinct *statext_ndistinct_deserialize(bytea *data);
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extern MVDependencies *statext_dependencies_build(int numrows, HeapTuple *rows,
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Bitmapset *attrs, VacAttrStats **stats);
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extern bytea *statext_dependencies_serialize(MVDependencies *dependencies);
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extern MVDependencies *statext_dependencies_deserialize(bytea *data);
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extern MultiSortSupport multi_sort_init(int ndims);
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extern void multi_sort_add_dimension(MultiSortSupport mss, int sortdim,
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Oid oper);
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extern int multi_sort_compare(const void *a, const void *b, void *arg);
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extern int multi_sort_compare_dim(int dim, const SortItem *a,
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const SortItem *b, MultiSortSupport mss);
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extern int multi_sort_compare_dims(int start, int end, const SortItem *a,
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const SortItem *b, MultiSortSupport mss);
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#endif /* EXTENDED_STATS_INTERNAL_H */
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