mirror of
https://github.com/postgres/postgres.git
synced 2025-07-30 11:03:19 +03:00
Phrase full text search.
Patch introduces new text search operator (<-> or <DISTANCE>) into tsquery. On-disk and binary in/out format of tsquery are backward compatible. It has two side effect: - change order for tsquery, so, users, who has a btree index over tsquery, should reindex it - less number of parenthesis in tsquery output, and tsquery becomes more readable Authors: Teodor Sigaev, Oleg Bartunov, Dmitry Ivanov Reviewers: Alexander Korotkov, Artur Zakirov
This commit is contained in:
Teodor Sigaev
@ -278,15 +278,15 @@ SELECT '(!1|2)&3'::tsquery;
|
||||
(1 row)
|
||||
|
||||
SELECT '1|(2|(4|(5|6)))'::tsquery;
|
||||
tsquery
|
||||
-----------------------------------------
|
||||
'1' | ( '2' | ( '4' | ( '5' | '6' ) ) )
|
||||
tsquery
|
||||
-----------------------------
|
||||
'1' | '2' | '4' | '5' | '6'
|
||||
(1 row)
|
||||
|
||||
SELECT '1|2|4|5|6'::tsquery;
|
||||
tsquery
|
||||
-----------------------------------------
|
||||
( ( ( '1' | '2' ) | '4' ) | '5' ) | '6'
|
||||
tsquery
|
||||
-----------------------------
|
||||
'1' | '2' | '4' | '5' | '6'
|
||||
(1 row)
|
||||
|
||||
SELECT '1&(2&(4&(5&6)))'::tsquery;
|
||||
@ -340,7 +340,7 @@ select 'a' > 'b & c'::tsquery;
|
||||
select 'a | f' < 'b & c'::tsquery;
|
||||
?column?
|
||||
----------
|
||||
t
|
||||
f
|
||||
(1 row)
|
||||
|
||||
select 'a | ff' < 'b & c'::tsquery;
|
||||
@ -443,9 +443,9 @@ select count(*) from test_tsquery where keyword > 'new & york';
|
||||
|
||||
set enable_seqscan=on;
|
||||
select rewrite('foo & bar & qq & new & york', 'new & york'::tsquery, 'big & apple | nyc | new & york & city');
|
||||
rewrite
|
||||
----------------------------------------------------------------------------------
|
||||
'foo' & 'bar' & 'qq' & ( 'city' & 'new' & 'york' | ( 'nyc' | 'big' & 'apple' ) )
|
||||
rewrite
|
||||
------------------------------------------------------------------------------
|
||||
'foo' & 'bar' & 'qq' & ( 'nyc' | 'big' & 'apple' | 'city' & 'new' & 'york' )
|
||||
(1 row)
|
||||
|
||||
select rewrite('moscow', 'select keyword, sample from test_tsquery'::text );
|
||||
@ -461,9 +461,9 @@ select rewrite('moscow & hotel', 'select keyword, sample from test_tsquery'::tex
|
||||
(1 row)
|
||||
|
||||
select rewrite('bar & new & qq & foo & york', 'select keyword, sample from test_tsquery'::text );
|
||||
rewrite
|
||||
-------------------------------------------------------------------------------------
|
||||
'citi' & 'foo' & ( 'bar' | 'qq' ) & ( 'nyc' | ( 'big' & 'appl' | 'new' & 'york' ) )
|
||||
rewrite
|
||||
---------------------------------------------------------------------------------
|
||||
( 'nyc' | 'big' & 'appl' | 'new' & 'york' ) & 'citi' & 'foo' & ( 'bar' | 'qq' )
|
||||
(1 row)
|
||||
|
||||
select rewrite( ARRAY['moscow', keyword, sample] ) from test_tsquery;
|
||||
@ -479,9 +479,9 @@ select rewrite( ARRAY['moscow & hotel', keyword, sample] ) from test_tsquery;
|
||||
(1 row)
|
||||
|
||||
select rewrite( ARRAY['bar & new & qq & foo & york', keyword, sample] ) from test_tsquery;
|
||||
rewrite
|
||||
-------------------------------------------------------------------------------------
|
||||
'citi' & 'foo' & ( 'bar' | 'qq' ) & ( 'nyc' | ( 'big' & 'appl' | 'new' & 'york' ) )
|
||||
rewrite
|
||||
---------------------------------------------------------------------------------
|
||||
( 'nyc' | 'big' & 'appl' | 'new' & 'york' ) & 'citi' & 'foo' & ( 'bar' | 'qq' )
|
||||
(1 row)
|
||||
|
||||
select keyword from test_tsquery where keyword @> 'new';
|
||||
@ -520,9 +520,9 @@ select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('e
|
||||
(1 row)
|
||||
|
||||
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('english', 'bar & new & qq & foo & york') as query where keyword <@ query;
|
||||
rewrite
|
||||
-------------------------------------------------------------------------------------
|
||||
'citi' & 'foo' & ( 'bar' | 'qq' ) & ( 'nyc' | ( 'big' & 'appl' | 'new' & 'york' ) )
|
||||
rewrite
|
||||
---------------------------------------------------------------------------------
|
||||
( 'nyc' | 'big' & 'appl' | 'new' & 'york' ) & 'citi' & 'foo' & ( 'bar' | 'qq' )
|
||||
(1 row)
|
||||
|
||||
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('english', 'moscow') as query where query @> keyword;
|
||||
@ -538,9 +538,9 @@ select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('e
|
||||
(1 row)
|
||||
|
||||
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('english', 'bar & new & qq & foo & york') as query where query @> keyword;
|
||||
rewrite
|
||||
-------------------------------------------------------------------------------------
|
||||
'citi' & 'foo' & ( 'bar' | 'qq' ) & ( 'nyc' | ( 'big' & 'appl' | 'new' & 'york' ) )
|
||||
rewrite
|
||||
---------------------------------------------------------------------------------
|
||||
( 'nyc' | 'big' & 'appl' | 'new' & 'york' ) & 'citi' & 'foo' & ( 'bar' | 'qq' )
|
||||
(1 row)
|
||||
|
||||
create index qq on test_tsquery using gist (keyword gist_tp_tsquery_ops);
|
||||
@ -581,9 +581,9 @@ select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('e
|
||||
(1 row)
|
||||
|
||||
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('english', 'bar & new & qq & foo & york') as query where keyword <@ query;
|
||||
rewrite
|
||||
-------------------------------------------------------------------------------------
|
||||
'citi' & 'foo' & ( 'bar' | 'qq' ) & ( 'nyc' | ( 'big' & 'appl' | 'new' & 'york' ) )
|
||||
rewrite
|
||||
---------------------------------------------------------------------------------
|
||||
( 'nyc' | 'big' & 'appl' | 'new' & 'york' ) & 'citi' & 'foo' & ( 'bar' | 'qq' )
|
||||
(1 row)
|
||||
|
||||
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('english', 'moscow') as query where query @> keyword;
|
||||
@ -599,9 +599,9 @@ select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('e
|
||||
(1 row)
|
||||
|
||||
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('english', 'bar & new & qq & foo & york') as query where query @> keyword;
|
||||
rewrite
|
||||
-------------------------------------------------------------------------------------
|
||||
'citi' & 'foo' & ( 'bar' | 'qq' ) & ( 'nyc' | ( 'big' & 'appl' | 'new' & 'york' ) )
|
||||
rewrite
|
||||
---------------------------------------------------------------------------------
|
||||
( 'nyc' | 'big' & 'appl' | 'new' & 'york' ) & 'citi' & 'foo' & ( 'bar' | 'qq' )
|
||||
(1 row)
|
||||
|
||||
set enable_seqscan='on';
|
||||
|
||||
Reference in New Issue
Block a user