diff options
Diffstat (limited to 'src/include/access/brin.h')
-rw-r--r-- | src/include/access/brin.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/include/access/brin.h b/src/include/access/brin.h new file mode 100644 index 0000000..4e2be13 --- /dev/null +++ b/src/include/access/brin.h @@ -0,0 +1,55 @@ +/* + * AM-callable functions for BRIN indexes + * + * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group + * Portions Copyright (c) 1994, Regents of the University of California + * + * IDENTIFICATION + * src/include/access/brin.h + */ +#ifndef BRIN_H +#define BRIN_H + +#include "nodes/execnodes.h" +#include "utils/relcache.h" + + +/* + * Storage type for BRIN's reloptions + */ +typedef struct BrinOptions +{ + int32 vl_len_; /* varlena header (do not touch directly!) */ + BlockNumber pagesPerRange; + bool autosummarize; +} BrinOptions; + + +/* + * BrinStatsData represents stats data for planner use + */ +typedef struct BrinStatsData +{ + BlockNumber pagesPerRange; + BlockNumber revmapNumPages; +} BrinStatsData; + + +#define BRIN_DEFAULT_PAGES_PER_RANGE 128 +#define BrinGetPagesPerRange(relation) \ + (AssertMacro(relation->rd_rel->relkind == RELKIND_INDEX && \ + relation->rd_rel->relam == BRIN_AM_OID), \ + (relation)->rd_options ? \ + ((BrinOptions *) (relation)->rd_options)->pagesPerRange : \ + BRIN_DEFAULT_PAGES_PER_RANGE) +#define BrinGetAutoSummarize(relation) \ + (AssertMacro(relation->rd_rel->relkind == RELKIND_INDEX && \ + relation->rd_rel->relam == BRIN_AM_OID), \ + (relation)->rd_options ? \ + ((BrinOptions *) (relation)->rd_options)->autosummarize : \ + false) + + +extern void brinGetStats(Relation index, BrinStatsData *stats); + +#endif /* BRIN_H */ |