gin.h

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/*--------------------------------------------------------------------------
 * gin.h
 *    Public header file for Generalized Inverted Index access method.
 *
 *  Copyright (c) 2006-2013, 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 GINNProcs                      5

/*
 * 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;

/* 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);
extern bool gin_safe_restartpoint(void);

#endif   /* GIN_H */