Line data    Source code

       1             : /*--------------------------------------------------------------------------
       2             :  * gin.h
       3             :  *    Public header file for Generalized Inverted Index access method.
       4             :  *
       5             :  *  Copyright (c) 2006-2025, PostgreSQL Global Development Group
       6             :  *
       7             :  *  src/include/access/gin.h
       8             :  *--------------------------------------------------------------------------
       9             :  */
      10             : #ifndef GIN_H
      11             : #define GIN_H
      12             : 
      13             : #include "access/xlogreader.h"
      14             : #include "lib/stringinfo.h"
      15             : #include "nodes/execnodes.h"
      16             : #include "storage/shm_toc.h"
      17             : #include "storage/block.h"
      18             : #include "utils/relcache.h"
      19             : 
      20             : 
      21             : /*
      22             :  * amproc indexes for inverted indexes.
      23             :  */
      24             : #define GIN_COMPARE_PROC               1
      25             : #define GIN_EXTRACTVALUE_PROC          2
      26             : #define GIN_EXTRACTQUERY_PROC          3
      27             : #define GIN_CONSISTENT_PROC            4
      28             : #define GIN_COMPARE_PARTIAL_PROC       5
      29             : #define GIN_TRICONSISTENT_PROC         6
      30             : #define GIN_OPTIONS_PROC       7
      31             : #define GINNProcs                      7
      32             : 
      33             : /*
      34             :  * searchMode settings for extractQueryFn.
      35             :  */
      36             : #define GIN_SEARCH_MODE_DEFAULT         0
      37             : #define GIN_SEARCH_MODE_INCLUDE_EMPTY   1
      38             : #define GIN_SEARCH_MODE_ALL             2
      39             : #define GIN_SEARCH_MODE_EVERYTHING      3   /* for internal use only */
      40             : 
      41             : /*
      42             :  * Constant definition for progress reporting.  Phase numbers must match
      43             :  * ginbuildphasename.
      44             :  */
      45             : /* PROGRESS_CREATEIDX_SUBPHASE_INITIALIZE is 1 (see progress.h) */
      46             : #define PROGRESS_GIN_PHASE_INDEXBUILD_TABLESCAN     2
      47             : #define PROGRESS_GIN_PHASE_PERFORMSORT_1            3
      48             : #define PROGRESS_GIN_PHASE_MERGE_1                  4
      49             : #define PROGRESS_GIN_PHASE_PERFORMSORT_2            5
      50             : #define PROGRESS_GIN_PHASE_MERGE_2                  6
      51             : 
      52             : /*
      53             :  * GinStatsData represents stats data for planner use
      54             :  */
      55             : typedef struct GinStatsData
      56             : {
      57             :     BlockNumber nPendingPages;
      58             :     BlockNumber nTotalPages;
      59             :     BlockNumber nEntryPages;
      60             :     BlockNumber nDataPages;
      61             :     int64       nEntries;
      62             :     int32       ginVersion;
      63             : } GinStatsData;
      64             : 
      65             : /*
      66             :  * A ternary value used by tri-consistent functions.
      67             :  *
      68             :  * This must be of the same size as a bool because some code will cast a
      69             :  * pointer to a bool to a pointer to a GinTernaryValue.
      70             :  */
      71             : typedef char GinTernaryValue;
      72             : 
      73             : StaticAssertDecl(sizeof(GinTernaryValue) == sizeof(bool),
      74             :                  "sizes of GinTernaryValue and bool are not equal");
      75             : 
      76             : #define GIN_FALSE       0       /* item is not present / does not match */
      77             : #define GIN_TRUE        1       /* item is present / matches */
      78             : #define GIN_MAYBE       2       /* don't know if item is present / don't know
      79             :                                  * if matches */
      80             : 
      81             : static inline GinTernaryValue
      82      968842 : DatumGetGinTernaryValue(Datum X)
      83             : {
      84      968842 :     return (GinTernaryValue) X;
      85             : }
      86             : 
      87             : static inline Datum
      88      968842 : GinTernaryValueGetDatum(GinTernaryValue X)
      89             : {
      90      968842 :     return (Datum) X;
      91             : }
      92             : 
      93             : #define PG_RETURN_GIN_TERNARY_VALUE(x) return GinTernaryValueGetDatum(x)
      94             : 
      95             : /* GUC parameters */
      96             : extern PGDLLIMPORT int GinFuzzySearchLimit;
      97             : extern PGDLLIMPORT int gin_pending_list_limit;
      98             : 
      99             : /* ginutil.c */
     100             : extern void ginGetStats(Relation index, GinStatsData *stats);
     101             : extern void ginUpdateStats(Relation index, const GinStatsData *stats,
     102             :                            bool is_build);
     103             : 
     104             : extern void _gin_parallel_build_main(dsm_segment *seg, shm_toc *toc);
     105             : 
     106             : #endif                          /* GIN_H */