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- /*--------------------------------------------------------------------------
- * gin.h
- * Public header file for Generalized Inverted Index access method.
- *
- * Copyright (c) 2006-2016, 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.
- *
- * For convenience, this is compatible with booleans. A boolean can be
- * safely cast 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);
- /* ginxlog.c */
- extern void gin_redo(XLogReaderState *record);
- extern void gin_desc(StringInfo buf, XLogReaderState *record);
- extern const char *gin_identify(uint8 info);
- extern void gin_xlog_startup(void);
- extern void gin_xlog_cleanup(void);
- #endif /* GIN_H */
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