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45 lines
1.2 KiB
45 lines
1.2 KiB
4 months ago
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/*--------------------------------------------------------------------------
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* gin.h
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* Public header file for Generalized Inverted Index access method.
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*
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* Copyright (c) 2006-2024, PostgreSQL Global Development Group
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*
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* src/include/access/gin.h
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*--------------------------------------------------------------------------
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*/
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#ifndef GIN_TUPLE_
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#define GIN_TUPLE_
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#include "access/ginblock.h"
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#include "storage/itemptr.h"
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#include "utils/sortsupport.h"
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/*
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* Data for one key in a GIN index.
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*/
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typedef struct GinTuple
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{
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int tuplen; /* length of the whole tuple */
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OffsetNumber attrnum; /* attnum of index key */
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uint16 keylen; /* bytes in data for key value */
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int16 typlen; /* typlen for key */
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bool typbyval; /* typbyval for key */
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signed char category; /* category: normal or NULL? */
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int nitems; /* number of TIDs in the data */
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char data[FLEXIBLE_ARRAY_MEMBER];
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} GinTuple;
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static inline ItemPointer
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GinTupleGetFirst(GinTuple *tup)
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{
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GinPostingList *list;
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list = (GinPostingList *) SHORTALIGN(tup->data + tup->keylen);
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return &list->first;
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}
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extern int _gin_compare_tuples(GinTuple *a, GinTuple *b, SortSupport ssup);
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#endif /* GIN_TUPLE_H */
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