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postgres/src/test/regress/sql/tsearch.sql
Tom Lane 56a8296212 Fix parsing of ignored operators in websearch_to_tsquery(). 
The manual says clearly that punctuation in the input of
websearch_to_tsquery() is ignored, except for the special cases
of dashes and quotes.  However, this failed for cases like
"(foo bar) or something", or in general an ISOPERATOR character
in front of the "or".  We'd switch back to WAITOPERAND state,
then ignore the operator character while remaining in that state,
and then reach the "or" in WAITOPERAND state which (intentionally)
makes us treat it as data.

The fix is simple enough: if we see an ISOPERATOR character while in
WAITOPERATOR state, we have to skip it while staying in that state.
(We don't need to worry about other punctuation characters: those will
be consumed as though they were words, but then rejected by lexizing.)

In v14 and up (since commit eb086056f) we can simplify the code a bit
more too, because there is no longer a reason for the WAITOPERAND
state to distinguish between quoted and unquoted operands.

Per bug #18479 from Manos Emmanouilidis.  Back-patch to all supported
branches.

Discussion: https://postgr.es/m/18479-d9b46e2fc242c33e@postgresql.org
2024-06-13 20:35:02 -04:00

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-- directory paths are passed to us in environment variables
\getenv abs_srcdir PG_ABS_SRCDIR
--
-- Sanity checks for text search catalogs
--
-- NB: we assume the oidjoins test will have caught any dangling links,
-- that is OID or REGPROC fields that are not zero and do not match some
-- row in the linked-to table. However, if we want to enforce that a link
-- field can't be 0, we have to check it here.
-- Find unexpected zero link entries
SELECT oid, prsname
FROM pg_ts_parser
WHERE prsnamespace = 0 OR prsstart = 0 OR prstoken = 0 OR prsend = 0 OR
-- prsheadline is optional
prslextype = 0;
SELECT oid, dictname
FROM pg_ts_dict
WHERE dictnamespace = 0 OR dictowner = 0 OR dicttemplate = 0;
SELECT oid, tmplname
FROM pg_ts_template
WHERE tmplnamespace = 0 OR tmpllexize = 0; -- tmplinit is optional
SELECT oid, cfgname
FROM pg_ts_config
WHERE cfgnamespace = 0 OR cfgowner = 0 OR cfgparser = 0;
SELECT mapcfg, maptokentype, mapseqno
FROM pg_ts_config_map
WHERE mapcfg = 0 OR mapdict = 0;
-- Look for pg_ts_config_map entries that aren't one of parser's token types
SELECT * FROM
( SELECT oid AS cfgid, (ts_token_type(cfgparser)).tokid AS tokid
FROM pg_ts_config ) AS tt
RIGHT JOIN pg_ts_config_map AS m
ON (tt.cfgid=m.mapcfg AND tt.tokid=m.maptokentype)
WHERE
tt.cfgid IS NULL OR tt.tokid IS NULL;
-- Load some test data
CREATE TABLE test_tsvector(
t text,
a tsvector
);
\set filename :abs_srcdir '/data/tsearch.data'
COPY test_tsvector FROM :'filename';
ANALYZE test_tsvector;
-- test basic text search behavior without indexes, then with
SELECT count(*) FROM test_tsvector WHERE a @@ 'wr|qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wr&qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'eq&yt';
SELECT count(*) FROM test_tsvector WHERE a @@ 'eq|yt';
SELECT count(*) FROM test_tsvector WHERE a @@ '(eq&yt)|(wr&qh)';
SELECT count(*) FROM test_tsvector WHERE a @@ '(eq|yt)&(wr|qh)';
SELECT count(*) FROM test_tsvector WHERE a @@ 'w:*|q:*';
SELECT count(*) FROM test_tsvector WHERE a @@ any ('{wr,qh}');
SELECT count(*) FROM test_tsvector WHERE a @@ 'no_such_lexeme';
SELECT count(*) FROM test_tsvector WHERE a @@ '!no_such_lexeme';
SELECT count(*) FROM test_tsvector WHERE a @@ 'pl <-> yh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'yh <-> pl';
SELECT count(*) FROM test_tsvector WHERE a @@ 'qe <2> qt';
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> yh';
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> !yh';
SELECT count(*) FROM test_tsvector WHERE a @@ '!yh <-> pl';
SELECT count(*) FROM test_tsvector WHERE a @@ '!qe <2> qt';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(pl <-> yh)';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(yh <-> pl)';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(qe <2> qt)';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wd:A';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wd:D';
SELECT count(*) FROM test_tsvector WHERE a @@ '!wd:A';
SELECT count(*) FROM test_tsvector WHERE a @@ '!wd:D';
create index wowidx on test_tsvector using gist (a);
SET enable_seqscan=OFF;
SET enable_indexscan=ON;
SET enable_bitmapscan=OFF;
explain (costs off) SELECT count(*) FROM test_tsvector WHERE a @@ 'wr|qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wr|qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wr&qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'eq&yt';
SELECT count(*) FROM test_tsvector WHERE a @@ 'eq|yt';
SELECT count(*) FROM test_tsvector WHERE a @@ '(eq&yt)|(wr&qh)';
SELECT count(*) FROM test_tsvector WHERE a @@ '(eq|yt)&(wr|qh)';
SELECT count(*) FROM test_tsvector WHERE a @@ 'w:*|q:*';
SELECT count(*) FROM test_tsvector WHERE a @@ any ('{wr,qh}');
SELECT count(*) FROM test_tsvector WHERE a @@ 'no_such_lexeme';
SELECT count(*) FROM test_tsvector WHERE a @@ '!no_such_lexeme';
SELECT count(*) FROM test_tsvector WHERE a @@ 'pl <-> yh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'yh <-> pl';
SELECT count(*) FROM test_tsvector WHERE a @@ 'qe <2> qt';
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> yh';
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> !yh';
SELECT count(*) FROM test_tsvector WHERE a @@ '!yh <-> pl';
SELECT count(*) FROM test_tsvector WHERE a @@ '!qe <2> qt';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(pl <-> yh)';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(yh <-> pl)';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(qe <2> qt)';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wd:A';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wd:D';
SELECT count(*) FROM test_tsvector WHERE a @@ '!wd:A';
SELECT count(*) FROM test_tsvector WHERE a @@ '!wd:D';
SET enable_indexscan=OFF;
SET enable_bitmapscan=ON;
explain (costs off) SELECT count(*) FROM test_tsvector WHERE a @@ 'wr|qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wr|qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wr&qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'eq&yt';
SELECT count(*) FROM test_tsvector WHERE a @@ 'eq|yt';
SELECT count(*) FROM test_tsvector WHERE a @@ '(eq&yt)|(wr&qh)';
SELECT count(*) FROM test_tsvector WHERE a @@ '(eq|yt)&(wr|qh)';
SELECT count(*) FROM test_tsvector WHERE a @@ 'w:*|q:*';
SELECT count(*) FROM test_tsvector WHERE a @@ any ('{wr,qh}');
SELECT count(*) FROM test_tsvector WHERE a @@ 'no_such_lexeme';
SELECT count(*) FROM test_tsvector WHERE a @@ '!no_such_lexeme';
SELECT count(*) FROM test_tsvector WHERE a @@ 'pl <-> yh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'yh <-> pl';
SELECT count(*) FROM test_tsvector WHERE a @@ 'qe <2> qt';
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> yh';
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> !yh';
SELECT count(*) FROM test_tsvector WHERE a @@ '!yh <-> pl';
SELECT count(*) FROM test_tsvector WHERE a @@ '!qe <2> qt';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(pl <-> yh)';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(yh <-> pl)';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(qe <2> qt)';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wd:A';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wd:D';
SELECT count(*) FROM test_tsvector WHERE a @@ '!wd:A';
SELECT count(*) FROM test_tsvector WHERE a @@ '!wd:D';
-- Test siglen parameter of GiST tsvector_ops
CREATE INDEX wowidx1 ON test_tsvector USING gist (a tsvector_ops(foo=1));
CREATE INDEX wowidx1 ON test_tsvector USING gist (a tsvector_ops(siglen=0));
CREATE INDEX wowidx1 ON test_tsvector USING gist (a tsvector_ops(siglen=2048));
CREATE INDEX wowidx1 ON test_tsvector USING gist (a tsvector_ops(siglen=100,foo='bar'));
CREATE INDEX wowidx1 ON test_tsvector USING gist (a tsvector_ops(siglen=100, siglen = 200));
CREATE INDEX wowidx2 ON test_tsvector USING gist (a tsvector_ops(siglen=1));
\d test_tsvector
DROP INDEX wowidx;
EXPLAIN (costs off) SELECT count(*) FROM test_tsvector WHERE a @@ 'wr|qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wr|qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wr&qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'eq&yt';
SELECT count(*) FROM test_tsvector WHERE a @@ 'eq|yt';
SELECT count(*) FROM test_tsvector WHERE a @@ '(eq&yt)|(wr&qh)';
SELECT count(*) FROM test_tsvector WHERE a @@ '(eq|yt)&(wr|qh)';
SELECT count(*) FROM test_tsvector WHERE a @@ 'w:*|q:*';
SELECT count(*) FROM test_tsvector WHERE a @@ any ('{wr,qh}');
SELECT count(*) FROM test_tsvector WHERE a @@ 'no_such_lexeme';
SELECT count(*) FROM test_tsvector WHERE a @@ '!no_such_lexeme';
SELECT count(*) FROM test_tsvector WHERE a @@ 'pl <-> yh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'yh <-> pl';
SELECT count(*) FROM test_tsvector WHERE a @@ 'qe <2> qt';
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> yh';
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> !yh';
SELECT count(*) FROM test_tsvector WHERE a @@ '!yh <-> pl';
SELECT count(*) FROM test_tsvector WHERE a @@ '!qe <2> qt';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(pl <-> yh)';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(yh <-> pl)';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(qe <2> qt)';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wd:A';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wd:D';
SELECT count(*) FROM test_tsvector WHERE a @@ '!wd:A';
SELECT count(*) FROM test_tsvector WHERE a @@ '!wd:D';
DROP INDEX wowidx2;
CREATE INDEX wowidx ON test_tsvector USING gist (a tsvector_ops(siglen=484));
\d test_tsvector
EXPLAIN (costs off) SELECT count(*) FROM test_tsvector WHERE a @@ 'wr|qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wr|qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wr&qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'eq&yt';
SELECT count(*) FROM test_tsvector WHERE a @@ 'eq|yt';
SELECT count(*) FROM test_tsvector WHERE a @@ '(eq&yt)|(wr&qh)';
SELECT count(*) FROM test_tsvector WHERE a @@ '(eq|yt)&(wr|qh)';
SELECT count(*) FROM test_tsvector WHERE a @@ 'w:*|q:*';
SELECT count(*) FROM test_tsvector WHERE a @@ any ('{wr,qh}');
SELECT count(*) FROM test_tsvector WHERE a @@ 'no_such_lexeme';
SELECT count(*) FROM test_tsvector WHERE a @@ '!no_such_lexeme';
SELECT count(*) FROM test_tsvector WHERE a @@ 'pl <-> yh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'yh <-> pl';
SELECT count(*) FROM test_tsvector WHERE a @@ 'qe <2> qt';
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> yh';
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> !yh';
SELECT count(*) FROM test_tsvector WHERE a @@ '!yh <-> pl';
SELECT count(*) FROM test_tsvector WHERE a @@ '!qe <2> qt';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(pl <-> yh)';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(yh <-> pl)';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(qe <2> qt)';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wd:A';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wd:D';
SELECT count(*) FROM test_tsvector WHERE a @@ '!wd:A';
SELECT count(*) FROM test_tsvector WHERE a @@ '!wd:D';
RESET enable_seqscan;
RESET enable_indexscan;
RESET enable_bitmapscan;
DROP INDEX wowidx;
CREATE INDEX wowidx ON test_tsvector USING gin (a);
SET enable_seqscan=OFF;
-- GIN only supports bitmapscan, so no need to test plain indexscan
explain (costs off) SELECT count(*) FROM test_tsvector WHERE a @@ 'wr|qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wr|qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wr&qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'eq&yt';
SELECT count(*) FROM test_tsvector WHERE a @@ 'eq|yt';
SELECT count(*) FROM test_tsvector WHERE a @@ '(eq&yt)|(wr&qh)';
SELECT count(*) FROM test_tsvector WHERE a @@ '(eq|yt)&(wr|qh)';
SELECT count(*) FROM test_tsvector WHERE a @@ 'w:*|q:*';
SELECT count(*) FROM test_tsvector WHERE a @@ any ('{wr,qh}');
SELECT count(*) FROM test_tsvector WHERE a @@ 'no_such_lexeme';
SELECT count(*) FROM test_tsvector WHERE a @@ '!no_such_lexeme';
SELECT count(*) FROM test_tsvector WHERE a @@ 'pl <-> yh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'yh <-> pl';
SELECT count(*) FROM test_tsvector WHERE a @@ 'qe <2> qt';
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> yh';
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> !yh';
SELECT count(*) FROM test_tsvector WHERE a @@ '!yh <-> pl';
SELECT count(*) FROM test_tsvector WHERE a @@ '!qe <2> qt';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(pl <-> yh)';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(yh <-> pl)';
SELECT count(*) FROM test_tsvector WHERE a @@ '!(qe <2> qt)';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wd:A';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wd:D';
SELECT count(*) FROM test_tsvector WHERE a @@ '!wd:A';
SELECT count(*) FROM test_tsvector WHERE a @@ '!wd:D';
-- Test optimization of non-empty GIN_SEARCH_MODE_ALL queries
EXPLAIN (COSTS OFF)
SELECT count(*) FROM test_tsvector WHERE a @@ '!qh';
SELECT count(*) FROM test_tsvector WHERE a @@ '!qh';
EXPLAIN (COSTS OFF)
SELECT count(*) FROM test_tsvector WHERE a @@ 'wr' AND a @@ '!qh';
SELECT count(*) FROM test_tsvector WHERE a @@ 'wr' AND a @@ '!qh';
RESET enable_seqscan;
INSERT INTO test_tsvector VALUES ('???', 'DFG:1A,2B,6C,10 FGH');
SELECT * FROM ts_stat('SELECT a FROM test_tsvector') ORDER BY ndoc DESC, nentry DESC, word LIMIT 10;
SELECT * FROM ts_stat('SELECT a FROM test_tsvector', 'AB') ORDER BY ndoc DESC, nentry DESC, word;
--dictionaries and to_tsvector
SELECT ts_lexize('english_stem', 'skies');
SELECT ts_lexize('english_stem', 'identity');
SELECT * FROM ts_token_type('default');
SELECT * FROM ts_parse('default', '345 qwe@efd.r '' http://www.com/ http://aew.werc.ewr/?ad=qwe&dw 1aew.werc.ewr/?ad=qwe&dw 2aew.werc.ewr http://3aew.werc.ewr/?ad=qwe&dw http://4aew.werc.ewr http://5aew.werc.ewr:8100/? ad=qwe&dw 6aew.werc.ewr:8100/?ad=qwe&dw 7aew.werc.ewr:8100/?ad=qwe&dw=%20%32 +4.0e-10 qwe qwe qwqwe 234.435 455 5.005 teodor@stack.net teodor@123-stack.net 123_teodor@stack.net 123-teodor@stack.net qwe-wer asdf <fr>qwer jf sdjk<we hjwer <werrwe> ewr1> ewri2 <a href="qwe<qwe>">
/usr/local/fff /awdf/dwqe/4325 rewt/ewr wefjn /wqe-324/ewr gist.h gist.h.c gist.c. readline 4.2 4.2. 4.2, readline-4.2 readline-4.2. 234
<i <b> wow < jqw <> qwerty');
SELECT to_tsvector('english', '345 qwe@efd.r '' http://www.com/ http://aew.werc.ewr/?ad=qwe&dw 1aew.werc.ewr/?ad=qwe&dw 2aew.werc.ewr http://3aew.werc.ewr/?ad=qwe&dw http://4aew.werc.ewr http://5aew.werc.ewr:8100/? ad=qwe&dw 6aew.werc.ewr:8100/?ad=qwe&dw 7aew.werc.ewr:8100/?ad=qwe&dw=%20%32 +4.0e-10 qwe qwe qwqwe 234.435 455 5.005 teodor@stack.net teodor@123-stack.net 123_teodor@stack.net 123-teodor@stack.net qwe-wer asdf <fr>qwer jf sdjk<we hjwer <werrwe> ewr1> ewri2 <a href="qwe<qwe>">
/usr/local/fff /awdf/dwqe/4325 rewt/ewr wefjn /wqe-324/ewr gist.h gist.h.c gist.c. readline 4.2 4.2. 4.2, readline-4.2 readline-4.2. 234
<i <b> wow < jqw <> qwerty');
SELECT length(to_tsvector('english', '345 qwe@efd.r '' http://www.com/ http://aew.werc.ewr/?ad=qwe&dw 1aew.werc.ewr/?ad=qwe&dw 2aew.werc.ewr http://3aew.werc.ewr/?ad=qwe&dw http://4aew.werc.ewr http://5aew.werc.ewr:8100/? ad=qwe&dw 6aew.werc.ewr:8100/?ad=qwe&dw 7aew.werc.ewr:8100/?ad=qwe&dw=%20%32 +4.0e-10 qwe qwe qwqwe 234.435 455 5.005 teodor@stack.net teodor@123-stack.net 123_teodor@stack.net 123-teodor@stack.net qwe-wer asdf <fr>qwer jf sdjk<we hjwer <werrwe> ewr1> ewri2 <a href="qwe<qwe>">
/usr/local/fff /awdf/dwqe/4325 rewt/ewr wefjn /wqe-324/ewr gist.h gist.h.c gist.c. readline 4.2 4.2. 4.2, readline-4.2 readline-4.2. 234
<i <b> wow < jqw <> qwerty'));
-- ts_debug
SELECT * from ts_debug('english', '<myns:foo-bar_baz.blurfl>abc&nm1;def&#xa9;ghi&#245;jkl</myns:foo-bar_baz.blurfl>');
-- check parsing of URLs
SELECT * from ts_debug('english', 'http://www.harewoodsolutions.co.uk/press.aspx</span>');
SELECT * from ts_debug('english', 'http://aew.wer0c.ewr/id?ad=qwe&dw<span>');
SELECT * from ts_debug('english', 'http://5aew.werc.ewr:8100/?');
SELECT * from ts_debug('english', '5aew.werc.ewr:8100/?xx');
SELECT token, alias,
dictionaries, dictionaries is null as dnull, array_dims(dictionaries) as ddims,
lexemes, lexemes is null as lnull, array_dims(lexemes) as ldims
from ts_debug('english', 'a title');
-- to_tsquery
SELECT to_tsquery('english', 'qwe & sKies ');
SELECT to_tsquery('simple', 'qwe & sKies ');
SELECT to_tsquery('english', '''the wether'':dc & '' sKies '':BC ');
SELECT to_tsquery('english', 'asd&(and|fghj)');
SELECT to_tsquery('english', '(asd&and)|fghj');
SELECT to_tsquery('english', '(asd&!and)|fghj');
SELECT to_tsquery('english', '(the|and&(i&1))&fghj');
SELECT plainto_tsquery('english', 'the and z 1))& fghj');
SELECT plainto_tsquery('english', 'foo bar') && plainto_tsquery('english', 'asd');
SELECT plainto_tsquery('english', 'foo bar') || plainto_tsquery('english', 'asd fg');
SELECT plainto_tsquery('english', 'foo bar') || !!plainto_tsquery('english', 'asd fg');
SELECT plainto_tsquery('english', 'foo bar') && 'asd | fg';
-- Check stop word deletion, a and s are stop-words
SELECT to_tsquery('english', '!(a & !b) & c');
SELECT to_tsquery('english', '!(a & !b)');
SELECT to_tsquery('english', '(1 <-> 2) <-> a');
SELECT to_tsquery('english', '(1 <-> a) <-> 2');
SELECT to_tsquery('english', '(a <-> 1) <-> 2');
SELECT to_tsquery('english', 'a <-> (1 <-> 2)');
SELECT to_tsquery('english', '1 <-> (a <-> 2)');
SELECT to_tsquery('english', '1 <-> (2 <-> a)');
SELECT to_tsquery('english', '(1 <-> 2) <3> a');
SELECT to_tsquery('english', '(1 <-> a) <3> 2');
SELECT to_tsquery('english', '(a <-> 1) <3> 2');
SELECT to_tsquery('english', 'a <3> (1 <-> 2)');
SELECT to_tsquery('english', '1 <3> (a <-> 2)');
SELECT to_tsquery('english', '1 <3> (2 <-> a)');
SELECT to_tsquery('english', '(1 <3> 2) <-> a');
SELECT to_tsquery('english', '(1 <3> a) <-> 2');
SELECT to_tsquery('english', '(a <3> 1) <-> 2');
SELECT to_tsquery('english', 'a <-> (1 <3> 2)');
SELECT to_tsquery('english', '1 <-> (a <3> 2)');
SELECT to_tsquery('english', '1 <-> (2 <3> a)');
SELECT to_tsquery('english', '((a <-> 1) <-> 2) <-> s');
SELECT to_tsquery('english', '(2 <-> (a <-> 1)) <-> s');
SELECT to_tsquery('english', '((1 <-> a) <-> 2) <-> s');
SELECT to_tsquery('english', '(2 <-> (1 <-> a)) <-> s');
SELECT to_tsquery('english', 's <-> ((a <-> 1) <-> 2)');
SELECT to_tsquery('english', 's <-> (2 <-> (a <-> 1))');
SELECT to_tsquery('english', 's <-> ((1 <-> a) <-> 2)');
SELECT to_tsquery('english', 's <-> (2 <-> (1 <-> a))');
SELECT to_tsquery('english', '((a <-> 1) <-> s) <-> 2');
SELECT to_tsquery('english', '(s <-> (a <-> 1)) <-> 2');
SELECT to_tsquery('english', '((1 <-> a) <-> s) <-> 2');
SELECT to_tsquery('english', '(s <-> (1 <-> a)) <-> 2');
SELECT to_tsquery('english', '2 <-> ((a <-> 1) <-> s)');
SELECT to_tsquery('english', '2 <-> (s <-> (a <-> 1))');
SELECT to_tsquery('english', '2 <-> ((1 <-> a) <-> s)');
SELECT to_tsquery('english', '2 <-> (s <-> (1 <-> a))');
SELECT to_tsquery('english', 'foo <-> (a <-> (the <-> bar))');
SELECT to_tsquery('english', '((foo <-> a) <-> the) <-> bar');
SELECT to_tsquery('english', 'foo <-> a <-> the <-> bar');
SELECT phraseto_tsquery('english', 'PostgreSQL can be extended by the user in many ways');
SELECT ts_rank_cd(to_tsvector('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
'), to_tsquery('english', 'paint&water'));
SELECT ts_rank_cd(to_tsvector('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
'), to_tsquery('english', 'breath&motion&water'));
SELECT ts_rank_cd(to_tsvector('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
'), to_tsquery('english', 'ocean'));
SELECT ts_rank_cd(to_tsvector('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
'), to_tsquery('english', 'painted <-> Ship'));
SELECT ts_rank_cd(strip(to_tsvector('both stripped')),
to_tsquery('both & stripped'));
SELECT ts_rank_cd(to_tsvector('unstripped') || strip(to_tsvector('stripped')),
to_tsquery('unstripped & stripped'));
--headline tests
SELECT ts_headline('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
', to_tsquery('english', 'paint&water'));
SELECT ts_headline('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
', to_tsquery('english', 'breath&motion&water'));
SELECT ts_headline('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
', to_tsquery('english', 'ocean'));
SELECT ts_headline('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
', to_tsquery('english', 'day & drink'));
SELECT ts_headline('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
', to_tsquery('english', 'day | drink'));
SELECT ts_headline('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
', to_tsquery('english', 'day | !drink'));
SELECT ts_headline('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
', to_tsquery('english', 'painted <-> Ship & drink'));
SELECT ts_headline('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
', to_tsquery('english', 'painted <-> Ship | drink'));
SELECT ts_headline('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
', to_tsquery('english', 'painted <-> Ship | !drink'));
SELECT ts_headline('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
', phraseto_tsquery('english', 'painted Ocean'));
SELECT ts_headline('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
', phraseto_tsquery('english', 'idle as a painted Ship'));
SELECT ts_headline('english',
'Lorem ipsum urna. Nullam nullam ullamcorper urna.',
to_tsquery('english','Lorem') && phraseto_tsquery('english','ullamcorper urna'),
'MaxWords=100, MinWords=1');
SELECT ts_headline('english',
'Lorem ipsum urna. Nullam nullam ullamcorper urna.',
phraseto_tsquery('english','ullamcorper urna'),
'MaxWords=100, MinWords=5');
SELECT ts_headline('english', '
<html>
<!-- some comment -->
<body>
Sea view wow <u>foo bar</u> <i>qq</i>
<a href="http://www.google.com/foo.bar.html" target="_blank">YES &nbsp;</a>
ff-bg
<script>
document.write(15);
</script>
</body>
</html>',
to_tsquery('english', 'sea&foo'), 'HighlightAll=true');
SELECT ts_headline('simple', '1 2 3 1 3'::text, '1 <-> 3', 'MaxWords=2, MinWords=1');
SELECT ts_headline('simple', '1 2 3 1 3'::text, '1 & 3', 'MaxWords=4, MinWords=1');
SELECT ts_headline('simple', '1 2 3 1 3'::text, '1 <-> 3', 'MaxWords=4, MinWords=1');
--Check if headline fragments work
SELECT ts_headline('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
', to_tsquery('english', 'ocean'), 'MaxFragments=1');
--Check if more than one fragments are displayed
SELECT ts_headline('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
', to_tsquery('english', 'Coleridge & stuck'), 'MaxFragments=2');
--Fragments when there all query words are not in the document
SELECT ts_headline('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
', to_tsquery('english', 'ocean & seahorse'), 'MaxFragments=1');
--FragmentDelimiter option
SELECT ts_headline('english', '
Day after day, day after day,
We stuck, nor breath nor motion,
As idle as a painted Ship
Upon a painted Ocean.
Water, water, every where
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
S. T. Coleridge (1772-1834)
', to_tsquery('english', 'Coleridge & stuck'), 'MaxFragments=2,FragmentDelimiter=***');
--Fragments with phrase search
SELECT ts_headline('english',
'Lorem ipsum urna. Nullam nullam ullamcorper urna.',
to_tsquery('english','Lorem') && phraseto_tsquery('english','ullamcorper urna'),
'MaxFragments=100, MaxWords=100, MinWords=1');
-- Edge cases with empty query
SELECT ts_headline('english',
'', to_tsquery('english', ''));
SELECT ts_headline('english',
'foo bar', to_tsquery('english', ''));
--Rewrite sub system
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
1 & (2 <-> 3) 2 <-> 4
5 <-> 6 5 <-> 7
\.
\set ECHO all
ALTER TABLE test_tsquery ADD COLUMN keyword tsquery;
UPDATE test_tsquery SET keyword = to_tsquery('english', txtkeyword);
ALTER TABLE test_tsquery ADD COLUMN sample tsquery;
UPDATE test_tsquery SET sample = to_tsquery('english', txtsample::text);
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';
CREATE UNIQUE INDEX bt_tsq ON test_tsquery (keyword);
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';
RESET enable_seqscan;
SELECT ts_rewrite('foo & bar & qq & new & york', 'new & york'::tsquery, 'big & apple | nyc | new & york & city');
SELECT ts_rewrite(ts_rewrite('new & !york ', 'york', '!jersey'),
'jersey', 'mexico');
SELECT ts_rewrite('moscow', 'SELECT keyword, sample FROM test_tsquery'::text );
SELECT ts_rewrite('moscow & hotel', 'SELECT keyword, sample FROM test_tsquery'::text );
SELECT ts_rewrite('bar & qq & foo & (new <-> york)', 'SELECT keyword, sample FROM test_tsquery'::text );
SELECT ts_rewrite( 'moscow', 'SELECT keyword, sample FROM test_tsquery');
SELECT ts_rewrite( 'moscow & hotel', 'SELECT keyword, sample FROM test_tsquery');
SELECT ts_rewrite( 'bar & qq & foo & (new <-> york)', 'SELECT keyword, sample FROM test_tsquery');
SELECT ts_rewrite('1 & (2 <-> 3)', 'SELECT keyword, sample FROM test_tsquery'::text );
SELECT ts_rewrite('1 & (2 <2> 3)', 'SELECT keyword, sample FROM test_tsquery'::text );
SELECT ts_rewrite('5 <-> (1 & (2 <-> 3))', 'SELECT keyword, sample FROM test_tsquery'::text );
SELECT ts_rewrite('5 <-> (6 | 8)', 'SELECT keyword, sample FROM test_tsquery'::text );
-- Check empty substitution
SELECT ts_rewrite(to_tsquery('5 & (6 | 5)'), to_tsquery('5'), to_tsquery(''));
SELECT ts_rewrite(to_tsquery('!5'), to_tsquery('5'), to_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 ts_rewrite( query, 'SELECT keyword, sample FROM test_tsquery' ) FROM to_tsquery('english', 'moscow') AS query;
SELECT ts_rewrite( query, 'SELECT keyword, sample FROM test_tsquery' ) FROM to_tsquery('english', 'moscow & hotel') AS query;
SELECT ts_rewrite( query, 'SELECT keyword, sample FROM test_tsquery' ) FROM to_tsquery('english', 'bar & qq & foo & (new <-> york)') AS query;
SELECT ts_rewrite( query, 'SELECT keyword, sample FROM test_tsquery' ) FROM to_tsquery('english', 'moscow') AS query;
SELECT ts_rewrite( query, 'SELECT keyword, sample FROM test_tsquery' ) FROM to_tsquery('english', 'moscow & hotel') AS query;
SELECT ts_rewrite( query, 'SELECT keyword, sample FROM test_tsquery' ) FROM to_tsquery('english', 'bar & qq & foo & (new <-> york)') AS query;
CREATE INDEX qq ON test_tsquery USING gist (keyword 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 ts_rewrite( query, 'SELECT keyword, sample FROM test_tsquery' ) FROM to_tsquery('english', 'moscow') AS query;
SELECT ts_rewrite( query, 'SELECT keyword, sample FROM test_tsquery' ) FROM to_tsquery('english', 'moscow & hotel') AS query;
SELECT ts_rewrite( query, 'SELECT keyword, sample FROM test_tsquery' ) FROM to_tsquery('english', 'bar & qq & foo & (new <-> york)') AS query;
SELECT ts_rewrite( query, 'SELECT keyword, sample FROM test_tsquery' ) FROM to_tsquery('english', 'moscow') AS query;
SELECT ts_rewrite( query, 'SELECT keyword, sample FROM test_tsquery' ) FROM to_tsquery('english', 'moscow & hotel') AS query;
SELECT ts_rewrite( query, 'SELECT keyword, sample FROM test_tsquery' ) FROM to_tsquery('english', 'bar & qq & foo & (new <-> york)') AS query;
SELECT ts_rewrite(tsquery_phrase('foo', 'foo'), 'foo', 'bar | baz');
SELECT to_tsvector('foo bar') @@
ts_rewrite(tsquery_phrase('foo', 'foo'), 'foo', 'bar | baz');
SELECT to_tsvector('bar baz') @@
ts_rewrite(tsquery_phrase('foo', 'foo'), 'foo', 'bar | baz');
RESET enable_seqscan;
--test GUC
SET default_text_search_config=simple;
SELECT to_tsvector('SKIES My booKs');
SELECT plainto_tsquery('SKIES My booKs');
SELECT to_tsquery('SKIES & My | booKs');
SET default_text_search_config=english;
SELECT to_tsvector('SKIES My booKs');
SELECT plainto_tsquery('SKIES My booKs');
SELECT to_tsquery('SKIES & My | booKs');
--trigger
CREATE TRIGGER tsvectorupdate
BEFORE UPDATE OR INSERT ON test_tsvector
FOR EACH ROW EXECUTE PROCEDURE tsvector_update_trigger(a, 'pg_catalog.english', t);
SELECT count(*) FROM test_tsvector WHERE a @@ to_tsquery('345&qwerty');
INSERT INTO test_tsvector (t) VALUES ('345 qwerty');
SELECT count(*) FROM test_tsvector WHERE a @@ to_tsquery('345&qwerty');
UPDATE test_tsvector SET t = null WHERE t = '345 qwerty';
SELECT count(*) FROM test_tsvector WHERE a @@ to_tsquery('345&qwerty');
INSERT INTO test_tsvector (t) VALUES ('345 qwerty');
SELECT count(*) FROM test_tsvector WHERE a @@ to_tsquery('345&qwerty');
-- Test inlining of immutable constant functions
-- to_tsquery(text) is not immutable, so it won't be inlined
explain (costs off)
select * from test_tsquery, to_tsquery('new') q where txtsample @@ q;
-- to_tsquery(regconfig, text) is an immutable function.
-- That allows us to get rid of using function scan and join at all.
explain (costs off)
select * from test_tsquery, to_tsquery('english', 'new') q where txtsample @@ q;
-- test finding items in GIN's pending list
create temp table pendtest (ts tsvector);
create index pendtest_idx on pendtest using gin(ts);
insert into pendtest values (to_tsvector('Lore ipsam'));
insert into pendtest values (to_tsvector('Lore ipsum'));
select * from pendtest where 'ipsu:*'::tsquery @@ ts;
select * from pendtest where 'ipsa:*'::tsquery @@ ts;
select * from pendtest where 'ips:*'::tsquery @@ ts;
select * from pendtest where 'ipt:*'::tsquery @@ ts;
select * from pendtest where 'ipi:*'::tsquery @@ ts;
--check OP_PHRASE on index
create temp table phrase_index_test(fts tsvector);
insert into phrase_index_test values ('A fat cat has just eaten a rat.');
insert into phrase_index_test values (to_tsvector('english', 'A fat cat has just eaten a rat.'));
create index phrase_index_test_idx on phrase_index_test using gin(fts);
set enable_seqscan = off;
select * from phrase_index_test where fts @@ phraseto_tsquery('english', 'fat cat');
set enable_seqscan = on;
-- test websearch_to_tsquery function
select websearch_to_tsquery('simple', 'I have a fat:*ABCD cat');
select websearch_to_tsquery('simple', 'orange:**AABBCCDD');
select websearch_to_tsquery('simple', 'fat:A!cat:B|rat:C<');
select websearch_to_tsquery('simple', 'fat:A : cat:B');
select websearch_to_tsquery('simple', 'fat*rat');
select websearch_to_tsquery('simple', 'fat-rat');
select websearch_to_tsquery('simple', 'fat_rat');
-- weights are completely ignored
select websearch_to_tsquery('simple', 'abc : def');
select websearch_to_tsquery('simple', 'abc:def');
select websearch_to_tsquery('simple', 'a:::b');
select websearch_to_tsquery('simple', 'abc:d');
select websearch_to_tsquery('simple', ':');
-- these operators are ignored
select websearch_to_tsquery('simple', 'abc & def');
select websearch_to_tsquery('simple', 'abc | def');
select websearch_to_tsquery('simple', 'abc <-> def');
-- parens are ignored, too
select websearch_to_tsquery('simple', 'abc (pg or class)');
select websearch_to_tsquery('simple', '(foo bar) or (ding dong)');
-- NOT is ignored in quotes
select websearch_to_tsquery('english', 'My brand new smartphone');
select websearch_to_tsquery('english', 'My brand "new smartphone"');
select websearch_to_tsquery('english', 'My brand "new -smartphone"');
-- test OR operator
select websearch_to_tsquery('simple', 'cat or rat');
select websearch_to_tsquery('simple', 'cat OR rat');
select websearch_to_tsquery('simple', 'cat "OR" rat');
select websearch_to_tsquery('simple', 'cat OR');
select websearch_to_tsquery('simple', 'OR rat');
select websearch_to_tsquery('simple', '"fat cat OR rat"');
select websearch_to_tsquery('simple', 'fat (cat OR rat');
select websearch_to_tsquery('simple', 'or OR or');
-- OR is an operator here ...
select websearch_to_tsquery('simple', '"fat cat"or"fat rat"');
select websearch_to_tsquery('simple', 'fat or(rat');
select websearch_to_tsquery('simple', 'fat or)rat');
select websearch_to_tsquery('simple', 'fat or&rat');
select websearch_to_tsquery('simple', 'fat or|rat');
select websearch_to_tsquery('simple', 'fat or!rat');
select websearch_to_tsquery('simple', 'fat or<rat');
select websearch_to_tsquery('simple', 'fat or>rat');
select websearch_to_tsquery('simple', 'fat or ');
-- ... but not here
select websearch_to_tsquery('simple', 'abc orange');
select websearch_to_tsquery('simple', 'abc OR1234');
select websearch_to_tsquery('simple', 'abc or-abc');
select websearch_to_tsquery('simple', 'abc OR_abc');
-- test quotes
select websearch_to_tsquery('english', '"pg_class pg');
select websearch_to_tsquery('english', 'pg_class pg"');
select websearch_to_tsquery('english', '"pg_class pg"');
select websearch_to_tsquery('english', '"pg_class : pg"');
select websearch_to_tsquery('english', 'abc "pg_class pg"');
select websearch_to_tsquery('english', '"pg_class pg" def');
select websearch_to_tsquery('english', 'abc "pg pg_class pg" def');
select websearch_to_tsquery('english', ' or "pg pg_class pg" or ');
select websearch_to_tsquery('english', '""pg pg_class pg""');
select websearch_to_tsquery('english', 'abc """"" def');
select websearch_to_tsquery('english', 'cat -"fat rat"');
select websearch_to_tsquery('english', 'cat -"fat rat" cheese');
select websearch_to_tsquery('english', 'abc "def -"');
select websearch_to_tsquery('english', 'abc "def :"');
select websearch_to_tsquery('english', '"A fat cat" has just eaten a -rat.');
select websearch_to_tsquery('english', '"A fat cat" has just eaten OR !rat.');
select websearch_to_tsquery('english', '"A fat cat" has just (+eaten OR -rat)');
select websearch_to_tsquery('english', 'this is ----fine');
select websearch_to_tsquery('english', '(()) )))) this ||| is && -fine, "dear friend" OR good');
select websearch_to_tsquery('english', 'an old <-> cat " is fine &&& too');
select websearch_to_tsquery('english', '"A the" OR just on');
select websearch_to_tsquery('english', '"a fat cat" ate a rat');
select to_tsvector('english', 'A fat cat ate a rat') @@
websearch_to_tsquery('english', '"a fat cat" ate a rat');
select to_tsvector('english', 'A fat grey cat ate a rat') @@
websearch_to_tsquery('english', '"a fat cat" ate a rat');
-- cases handled by gettoken_tsvector()
select websearch_to_tsquery('''');
select websearch_to_tsquery('''abc''''def''');
select websearch_to_tsquery('\abc');
select websearch_to_tsquery('\');
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