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More accuracy works with stopwords in queries

This commit is contained in:
Teodor Sigaev 2003-08-28 12:23:24 +00:00
parent d1031cdef2
commit 61366a9503
5 changed files with 39 additions and 56 deletions
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24
contrib/tsearch2/expected/tsearch2.out
View File

@ -569,6 +569,30 @@ select to_tsquery('default', '\'the wether\':dc & \' sKies \':BC ');
'wether':CD & 'sky':BC
(1 row)
select to_tsquery('asd&(and|fghj)');
to_tsquery
----------------
'asd' & 'fghj'
(1 row)
select to_tsquery('(asd&and)|fghj');
to_tsquery
----------------
'asd' | 'fghj'
(1 row)
select to_tsquery('(asd&!and)|fghj');
to_tsquery
----------------
'asd' | 'fghj'
(1 row)
select to_tsquery('(the|and&(i&1))&fghj');
to_tsquery
--------------
'1' & 'fghj'
(1 row)
select 'a b:89 ca:23A,64b d:34c'::tsvector @@ 'd:AC & ca';
?column?
----------

13
contrib/tsearch2/query.c
View File

@ -52,15 +52,6 @@ Datum to_tsquery_name(PG_FUNCTION_ARGS);
PG_FUNCTION_INFO_V1(to_tsquery_current);
Datum to_tsquery_current(PG_FUNCTION_ARGS);
#define END 0
#define ERR 1
#define VAL 2
#define OPR 3
#define OPEN 4
#define CLOSE 5
#define VALTRUE 6 /* for stop words */
#define VALFALSE 7
/* parser's states */
#define WAITOPERAND 1
#define WAITOPERATOR 2
@ -293,7 +284,7 @@ pushval_morph(QPRS_STATE * state, int typeval, char *strval, int lenval, int2 we
/* XXX */
if (prs.curwords == 0)
pushval_asis(state, VALTRUE, 0, 0, 0);
pushval_asis(state, VALSTOP, 0, 0, 0);
}
#define STACKDEPTH 32
@ -526,7 +517,7 @@ findoprnd(ITEM * ptr, int4 *pos)
elog(DEBUG3, (ptr[*pos].type == OPR) ?
"%d %c" : "%d %d", *pos, ptr[*pos].val);
#endif
if (ptr[*pos].type == VAL || ptr[*pos].type == VALTRUE)
if (ptr[*pos].type == VAL || ptr[*pos].type == VALSTOP)
{
ptr[*pos].left = 0;
(*pos)++;

3
contrib/tsearch2/query.h
View File

@ -46,8 +46,7 @@ typedef struct
#define OPR 3
#define OPEN 4
#define CLOSE 5
#define VALTRUE 6 /* for stop words */
#define VALFALSE 7
#define VALSTOP 6 /* for stop words */
bool TS_execute(ITEM * curitem, void *checkval,
bool calcnot, bool (*chkcond) (void *checkval, ITEM * val));

51
contrib/tsearch2/rewrite.c
View File

@ -177,6 +177,7 @@ clean_NOT_v2(ITEM * ptr, int4 *len)
#define V_UNKNOWN 0
#define V_TRUE 1
#define V_FALSE 2
#define V_STOP 3
/*
* Clean query tree from values which is always in
@ -190,10 +191,10 @@ clean_fakeval_intree(NODE * node, char *result)
if (node->valnode->type == VAL)
return node;
else if (node->valnode->type == VALTRUE)
else if (node->valnode->type == VALSTOP)
{
pfree(node);
*result = V_TRUE;
*result = V_STOP;
return NULL;
}
@ -203,65 +204,29 @@ clean_fakeval_intree(NODE * node, char *result)
node->right = clean_fakeval_intree(node->right, &rresult);
if (!node->right)
{
*result = (rresult == V_TRUE) ? V_FALSE : V_TRUE;
*result = V_STOP;
freetree(node);
return NULL;
}
}
else if (node->valnode->val == (int4) '|')
{
NODE *res = node;
node->left = clean_fakeval_intree(node->left, &lresult);
node->right = clean_fakeval_intree(node->right, &rresult);
if (lresult == V_TRUE || rresult == V_TRUE)
{
freetree(node);
*result = V_TRUE;
return NULL;
}
else if (lresult == V_FALSE && rresult == V_FALSE)
{
freetree(node);
*result = V_FALSE;
return NULL;
}
else if (lresult == V_FALSE)
{
res = node->right;
pfree(node);
}
else if (rresult == V_FALSE)
{
res = node->left;
pfree(node);
}
return res;
}
else
{
NODE *res = node;
node->left = clean_fakeval_intree(node->left, &lresult);
node->right = clean_fakeval_intree(node->right, &rresult);
if (lresult == V_FALSE || rresult == V_FALSE)
if (lresult == V_STOP && rresult == V_STOP)
{
freetree(node);
*result = V_FALSE;
*result = V_STOP;
return NULL;
}
else if (lresult == V_TRUE && rresult == V_TRUE)
{
freetree(node);
*result = V_TRUE;
return NULL;
}
else if (lresult == V_TRUE)
else if (lresult == V_STOP)
{
res = node->right;
pfree(node);
}
else if (rresult == V_TRUE)
else if (rresult == V_STOP)
{
res = node->left;
pfree(node);

4
contrib/tsearch2/sql/tsearch2.sql
View File

@ -87,6 +87,10 @@ SELECT length(to_tsvector('default', '345 qwe@efd.r \' http://www.com/ http://ae
select to_tsquery('default', 'qwe & sKies ');
select to_tsquery('simple', 'qwe & sKies ');
select to_tsquery('default', '\'the wether\':dc & \' sKies \':BC ');
select to_tsquery('asd&(and|fghj)');
select to_tsquery('(asd&and)|fghj');
select to_tsquery('(asd&!and)|fghj');
select to_tsquery('(the|and&(i&1))&fghj');
select 'a b:89 ca:23A,64b d:34c'::tsvector @@ 'd:AC & ca';
select 'a b:89 ca:23A,64b d:34c'::tsvector @@ 'd:AC & ca:B';
select 'a b:89 ca:23A,64b d:34c'::tsvector @@ 'd:AC & ca:A';