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https://github.com/postgres/postgres.git
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754148d81f
with minor editorization by me. Hstore improvements * add operation hstore ? text - excat equivalent of exist() * remove undocumented behaviour of contains operation with NULL value * now 'key'::text=>NULL returns '"key"=>NULL' instead of NULL * Add GIN support for contains and exist operations * Add GiST support for exist operatiion * improve regression tests
57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
#ifndef __HSTORE_H__
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#define __HSTORE_H__
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#include "postgres.h"
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#include "funcapi.h"
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#include "access/gist.h"
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#include "access/itup.h"
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#include "utils/elog.h"
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#include "utils/palloc.h"
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#include "utils/builtins.h"
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#include "storage/bufpage.h"
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typedef struct
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{
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uint16 keylen;
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uint16 vallen;
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uint32
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valisnull:1,
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pos:31;
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} HEntry;
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typedef struct
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{
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int32 vl_len_; /* varlena header (do not touch directly!) */
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int4 size;
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char data[1];
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} HStore;
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#define HSHRDSIZE (VARHDRSZ + sizeof(int4))
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#define CALCDATASIZE(x, lenstr) ( (x) * sizeof(HEntry) + HSHRDSIZE + (lenstr) )
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#define ARRPTR(x) ( (HEntry*) ( (char*)(x) + HSHRDSIZE ) )
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#define STRPTR(x) ( (char*)(x) + HSHRDSIZE + ( sizeof(HEntry) * ((HStore*)x)->size ) )
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#define PG_GETARG_HS(x) ((HStore*)PG_DETOAST_DATUM(PG_GETARG_DATUM(x)))
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typedef struct
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{
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char *key;
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char *val;
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uint16 keylen;
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uint16 vallen;
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bool isnull;
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bool needfree;
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} Pairs;
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int comparePairs(const void *a, const void *b);
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int uniquePairs(Pairs * a, int4 l, int4 *buflen);
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#define HStoreContainsStrategyNumber 7
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#define HStoreExistsStrategyNumber 9
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#endif
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