mirror of
https://github.com/postgres/postgres.git
synced 2026-03-30 22:36:05 -04:00
9a95a77d9d
Using the standard bool type provided by C allows some recent compilers and debuggers to give better diagnostics. Also, some extension code and third-party headers are increasingly pulling in stdbool.h, so it's probably saner if everyone uses the same definition. But PostgreSQL code is not prepared to handle bool of a size other than 1, so we keep our own old definition if we encounter a stdbool.h with a bool of a different size. (Among current build farm members, this only applies to old macOS versions on PowerPC.) To check that the used bool is of the right size, add a static assertions about size of GinTernaryValue vs bool. This is currently the only place that assumes that bool and char are of the same size. Discussion: https://www.postgresql.org/message-id/flat/3a0fe7e1-5ed1-414b-9230-53bbc0ed1f49@2ndquadrant.com
76 lines
2.1 KiB
C
76 lines
2.1 KiB
C
/*--------------------------------------------------------------------------
|
|
* gin.h
|
|
* Public header file for Generalized Inverted Index access method.
|
|
*
|
|
* Copyright (c) 2006-2018, PostgreSQL Global Development Group
|
|
*
|
|
* src/include/access/gin.h
|
|
*--------------------------------------------------------------------------
|
|
*/
|
|
#ifndef GIN_H
|
|
#define GIN_H
|
|
|
|
#include "access/xlogreader.h"
|
|
#include "lib/stringinfo.h"
|
|
#include "storage/block.h"
|
|
#include "utils/relcache.h"
|
|
|
|
|
|
/*
|
|
* amproc indexes for inverted indexes.
|
|
*/
|
|
#define GIN_COMPARE_PROC 1
|
|
#define GIN_EXTRACTVALUE_PROC 2
|
|
#define GIN_EXTRACTQUERY_PROC 3
|
|
#define GIN_CONSISTENT_PROC 4
|
|
#define GIN_COMPARE_PARTIAL_PROC 5
|
|
#define GIN_TRICONSISTENT_PROC 6
|
|
#define GINNProcs 6
|
|
|
|
/*
|
|
* searchMode settings for extractQueryFn.
|
|
*/
|
|
#define GIN_SEARCH_MODE_DEFAULT 0
|
|
#define GIN_SEARCH_MODE_INCLUDE_EMPTY 1
|
|
#define GIN_SEARCH_MODE_ALL 2
|
|
#define GIN_SEARCH_MODE_EVERYTHING 3 /* for internal use only */
|
|
|
|
/*
|
|
* GinStatsData represents stats data for planner use
|
|
*/
|
|
typedef struct GinStatsData
|
|
{
|
|
BlockNumber nPendingPages;
|
|
BlockNumber nTotalPages;
|
|
BlockNumber nEntryPages;
|
|
BlockNumber nDataPages;
|
|
int64 nEntries;
|
|
int32 ginVersion;
|
|
} GinStatsData;
|
|
|
|
/*
|
|
* A ternary value used by tri-consistent functions.
|
|
*
|
|
* This must be of the same size as a bool because some code will cast a
|
|
* pointer to a bool to a pointer to a GinTernaryValue.
|
|
*/
|
|
typedef char GinTernaryValue;
|
|
|
|
#define GIN_FALSE 0 /* item is not present / does not match */
|
|
#define GIN_TRUE 1 /* item is present / matches */
|
|
#define GIN_MAYBE 2 /* don't know if item is present / don't know
|
|
* if matches */
|
|
|
|
#define DatumGetGinTernaryValue(X) ((GinTernaryValue)(X))
|
|
#define GinTernaryValueGetDatum(X) ((Datum)(X))
|
|
#define PG_RETURN_GIN_TERNARY_VALUE(x) return GinTernaryValueGetDatum(x)
|
|
|
|
/* GUC parameters */
|
|
extern PGDLLIMPORT int GinFuzzySearchLimit;
|
|
extern int gin_pending_list_limit;
|
|
|
|
/* ginutil.c */
|
|
extern void ginGetStats(Relation index, GinStatsData *stats);
|
|
extern void ginUpdateStats(Relation index, const GinStatsData *stats);
|
|
|
|
#endif /* GIN_H */
|