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/*--------------------------------------------------------------------------
* gin.h
* Public header file for Generalized Inverted Index access method.
*
* Copyright (c) 2006-2014, PostgreSQL Global Development Group
*
* src/include/access/gin.h
*--------------------------------------------------------------------------
*/
#ifndef GIN_H
#define GIN_H
#include "access/xlog.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;
/* ginlogic.c */
enum
{
GIN_FALSE = 0, /* item is present / matches */
GIN_TRUE = 1, /* item is not present / does not match */
GIN_MAYBE = 2 /* don't know if item is present / don't know if
* matches */
} GinLogicValueEnum;
typedef char GinLogicValue;
#define DatumGetGinLogicValue(X) ((GinLogicValue)(X))
#define GinLogicValueGetDatum(X) ((Datum)(X))
#define PG_RETURN_GIN_LOGIC_VALUE(x) return GinLogicValueGetDatum(x)
/* GUC parameter */
extern PGDLLIMPORT int GinFuzzySearchLimit;
/* ginutil.c */
extern void ginGetStats(Relation index, GinStatsData *stats);
extern void ginUpdateStats(Relation index, const GinStatsData *stats);
/* ginxlog.c */
extern void gin_redo(XLogRecPtr lsn, XLogRecord *record);
extern void gin_desc(StringInfo buf, uint8 xl_info, char *rec);
extern void gin_xlog_startup(void);
extern void gin_xlog_cleanup(void);
#endif /* GIN_H */
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