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https://git.postgresql.org/git/postgresql.git
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0645663e6c
1 Comparison operation for tsquery
2 Btree index on tsquery
3 numnode(tsquery) - returns 'length' of tsquery
4 tsquery @ tsquery, tsquery ~ tsquery - contains, contained for tsquery.
Note: They don't gurantee exact result, only MAY BE, so it
useful only for speed up rewrite functions
5 GiST index support for @,~
6 rewrite():
select rewrite(orig, what, to);
select rewrite(ARRAY[orig, what, to]) from tsquery_table;
select rewrite(orig, 'select what, to from tsquery_table;');
7 significantly improve cover algorithm
45 lines
1.0 KiB
C
45 lines
1.0 KiB
C
#ifndef __QUERY_UTIL_H__
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#define __QUERY_UTIL_H__
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#include "postgres.h"
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#include "utils/memutils.h"
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#include "query.h"
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typedef struct QTNode {
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ITEM *valnode;
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uint32 flags;
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int4 nchild;
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char *word;
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uint32 sign;
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struct QTNode **child;
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} QTNode;
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#define QTN_NEEDFREE 0x01
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#define QTN_NOCHANGE 0x02
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#define QTN_WORDFREE 0x04
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typedef enum {
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PlainMemory,
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SPIMemory,
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AggMemory
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} MemoryType;
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QTNode* QT2QTN( ITEM *in, char *operand );
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QUERYTYPE* QTN2QT( QTNode* in, MemoryType memtype );
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void QTNFree( QTNode* in );
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void QTNSort( QTNode* in );
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void QTNTernary( QTNode* in );
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void QTNBinary( QTNode* in );
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int QTNodeCompare( QTNode *an, QTNode *bn );
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QTNode* QTNCopy( QTNode* in, MemoryType memtype);
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bool QTNEq( QTNode* a, QTNode* b );
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extern MemoryContext AggregateContext;
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#define MEMALLOC(us, s) ( ((us)==SPIMemory) ? SPI_palloc(s) : ( ( (us)==PlainMemory ) ? palloc(s) : MemoryContextAlloc(AggregateContext, (s)) ) )
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#define MEMFREE(us, p) ( ((us)==SPIMemory) ? SPI_pfree(p) : pfree(p) )
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#endif
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