database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-31 22:04:40 +03:00
Code Activity

New features for tsearch2:

Browse Source 
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
This commit is contained in:
Teodor Sigaev
2005-11-08 17:08:46 +00:00
parent 6521ea008e
commit 0645663e6c
14 changed files with 1876 additions and 114 deletions
Download Patch File Download Diff File Expand all files Collapse all files

82
contrib/tsearch2/sql/tsearch2.sql
View File

@ -65,6 +65,88 @@ SELECT '1&(2&(4&(5|!6)))'::tsquery;
SELECT E'1&(''2''&('' 4''&(\\|5 | ''6 \\'' !|&'')))'::tsquery;
SELECT '''the wether'':dc & '' sKies '':BC & a:d b:a';
select 'a' < 'b & c'::tsquery;
select 'a' > 'b & c'::tsquery;
select 'a | f' < 'b & c'::tsquery;
select 'a | ff' < 'b & c'::tsquery;
select 'a | f | g' < 'b & c'::tsquery;
select numnode( 'new'::tsquery );
select numnode( 'new & york'::tsquery );
select numnode( 'new & york | qwery'::tsquery );
create table test_tsquery (txtkeyword text, txtsample text);
\set ECHO none
\copy test_tsquery from stdin
'New York' new & york | big & apple | nyc
Moscow moskva | moscow
'Sanct Peter' Peterburg | peter | 'Sanct Peterburg'
'foo bar qq' foo & (bar | qq) & city
\.
\set ECHO all
alter table test_tsquery add column keyword tsquery;
update test_tsquery set keyword = to_tsquery('default', txtkeyword);
alter table test_tsquery add column sample tsquery;
update test_tsquery set sample = to_tsquery('default', txtsample::text);
create unique index bt_tsq on test_tsquery (keyword);
select count(*) from test_tsquery where keyword < 'new & york';
select count(*) from test_tsquery where keyword <= 'new & york';
select count(*) from test_tsquery where keyword = 'new & york';
select count(*) from test_tsquery where keyword >= 'new & york';
select count(*) from test_tsquery where keyword > 'new & york';
set enable_seqscan=off;
select count(*) from test_tsquery where keyword < 'new & york';
select count(*) from test_tsquery where keyword <= 'new & york';
select count(*) from test_tsquery where keyword = 'new & york';
select count(*) from test_tsquery where keyword >= 'new & york';
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');
select rewrite('moscow', 'select keyword, sample from test_tsquery'::text );
select rewrite('moscow & hotel', 'select keyword, sample from test_tsquery'::text );
select rewrite('bar & new & qq & foo & york', 'select keyword, sample from test_tsquery'::text );
select rewrite( ARRAY['moscow', keyword, sample] ) from test_tsquery;
select rewrite( ARRAY['moscow & hotel', keyword, sample] ) from test_tsquery;
select rewrite( ARRAY['bar & new & qq & foo & york', keyword, sample] ) from test_tsquery;
select keyword from test_tsquery where keyword @ 'new';
select keyword from test_tsquery where keyword @ 'moscow';
select keyword from test_tsquery where keyword ~ 'new';
select keyword from test_tsquery where keyword ~ 'moscow';
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('default', 'moscow') as query where keyword ~ query;
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('default', 'moscow & hotel') as query where keyword ~ query;
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('default', 'bar & new & qq & foo & york') as query where keyword ~ query;
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('default', 'moscow') as query where query @ keyword;
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('default', 'moscow & hotel') as query where query @ keyword;
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('default', 'bar & new & qq & foo & york') as query where query @ keyword;
create index qq on test_tsquery using gist (keyword gist_tp_tsquery_ops);
set enable_seqscan='off';
select keyword from test_tsquery where keyword @ 'new';
select keyword from test_tsquery where keyword @ 'moscow';
select keyword from test_tsquery where keyword ~ 'new';
select keyword from test_tsquery where keyword ~ 'moscow';
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('default', 'moscow') as query where keyword ~ query;
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('default', 'moscow & hotel') as query where keyword ~ query;
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('default', 'bar & new & qq & foo & york') as query where keyword ~ query;
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('default', 'moscow') as query where query @ keyword;
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('default', 'moscow & hotel') as query where query @ keyword;
select rewrite( ARRAY[query, keyword, sample] ) from test_tsquery, to_tsquery('default', 'bar & new & qq & foo & york') as query where query @ keyword;
set enable_seqscan='on';
select lexize('simple', 'ASD56 hsdkf');
select lexize('en_stem', 'SKIES Problems identity');