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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
55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
#ifndef __QUERY_H__
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#define __QUERY_H__
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/*
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#define BS_DEBUG
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*/
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/*
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* item in polish notation with back link
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* to left operand
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*/
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typedef struct ITEM
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{
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int8 type;
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int8 weight;
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int2 left;
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int4 val;
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/* user-friendly value, must correlate with WordEntry */
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uint32
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istrue:1, /* use for ranking in Cover */
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length:11,
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distance:20;
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} ITEM;
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/*
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*Storage:
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* (len)(size)(array of ITEM)(array of operand in user-friendly form)
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*/
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typedef struct
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{
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int4 len;
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int4 size;
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char data[1];
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} QUERYTYPE;
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#define HDRSIZEQT ( 2 * sizeof(int4) )
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#define COMPUTESIZE(size,lenofoperand) ( HDRSIZEQT + (size) * sizeof(ITEM) + (lenofoperand) )
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#define GETQUERY(x) (ITEM*)( (char*)(x)+HDRSIZEQT )
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#define GETOPERAND(x) ( (char*)GETQUERY(x) + ((QUERYTYPE*)(x))->size * sizeof(ITEM) )
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#define ISOPERATOR(x) ( (x)=='!' || (x)=='&' || (x)=='|' || (x)=='(' || (x)==')' )
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#define END 0
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#define ERR 1
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#define VAL 2
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#define OPR 3
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#define OPEN 4
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#define CLOSE 5
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#define VALSTOP 6 /* for stop words */
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bool TS_execute(ITEM * curitem, void *checkval,
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bool calcnot, bool (*chkcond) (void *checkval, ITEM * val));
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#endif
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