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Fix full text search to handle NOT above a phrase search correctly.
Queries such as '!(foo<->bar)' failed to find matching rows when implemented as a GiST or GIN index search. That's because of failing to handle phrase searches as tri-valued when considering a query without any position information for the target tsvector. We can only say that the phrase operator might match, not that it does match; and therefore its NOT also might match. The previous coding incorrectly inverted the approximate phrase result to decide that there was certainly no match. To fix, we need to make TS_phrase_execute return a real ternary result, and then bubble that up accurately in TS_execute. As long as we have to do that anyway, we can simplify the baroque things TS_phrase_execute was doing internally to manage tri-valued searching with only a bool as explicit result. For now, I left the externally-visible result of TS_execute as a plain bool. There do not appear to be any outside callers that need to distinguish a three-way result, given that they passed in a flag saying what to do in the absence of position data. This might need to change someday, but we wouldn't want to back-patch such a change. Although tsginidx.c has its own TS_execute_ternary implementation for use at upper index levels, that sadly managed to get this case wrong as well :-(. Fixing it is a lot easier fortunately. Per bug #16388 from Charles Offenbacher. Back-patch to 9.6 where phrase search was introduced. Discussion: https://postgr.es/m/16388-98cffba38d0b7e6e@postgresql.org
This commit is contained in:
Tom Lane
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\n o9:1 hb:2 h9:3 qd:4 dh:5 qg:6 q1:7 qj:8 jy:9 se:10 q5:11 wt:12 nr:13 qv:14 ge:15 c5:16 el:17 6y:18 uo:19 rv:20 ax:21 pe:22 et:23 r0:24 fe:25 y6:26 dx:27 qx:28 ha:29 qq:30 lo:31 we:32 zy:33 v1:34 wy:35 dl:36 vr:37 wa:38 qr:39 rm:40 qi:41 qp:42 yn:43 tz:44 pg:45 ph:46 de:47 p0:48 do:49 qp:50 wp:51 wf:52 bw:53 xh:54 ky:55 xz:56 wh:57 hl:58 to:59 ek:60 rd:61 sv:62 rj:63 rq:64 re:65 h1:66 qg:67 qh:68 kl:69 f1:70 zm:71 18:72 ez:73 xe:74 vm:75 en:76 5j:77 o3:78 rn:79 fw:80 fe:81
|
||||
\n db:1 c2:2 bb:3 o0:4 w8:5 kl:6 kc:7 y4:8 qx:9 zm:10 pk:11 cw:12 id:13 ve:14 mh:15 lp:16 rq:17 jb:18 fl:19 x1:20 qi:21 wd:22 lx:23 f3:24 cy:25 bq:26 dd:27 ye:28 fn:29
|
||||
|
||||
@ -116,6 +116,66 @@ SELECT count(*) FROM test_tsvector WHERE a @@ '!no_such_lexeme';
|
||||
508
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ 'pl <-> yh';
|
||||
count
|
||||
-------
|
||||
1
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ 'yh <-> pl';
|
||||
count
|
||||
-------
|
||||
0
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ 'qe <2> qt';
|
||||
count
|
||||
-------
|
||||
1
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> yh';
|
||||
count
|
||||
-------
|
||||
3
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> !yh';
|
||||
count
|
||||
-------
|
||||
432
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!yh <-> pl';
|
||||
count
|
||||
-------
|
||||
1
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!qe <2> qt';
|
||||
count
|
||||
-------
|
||||
6
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!(pl <-> yh)';
|
||||
count
|
||||
-------
|
||||
507
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!(yh <-> pl)';
|
||||
count
|
||||
-------
|
||||
508
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!(qe <2> qt)';
|
||||
count
|
||||
-------
|
||||
507
|
||||
(1 row)
|
||||
|
||||
create index wowidx on test_tsvector using gist (a);
|
||||
SET enable_seqscan=OFF;
|
||||
SET enable_indexscan=ON;
|
||||
@ -188,6 +248,66 @@ SELECT count(*) FROM test_tsvector WHERE a @@ '!no_such_lexeme';
|
||||
508
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ 'pl <-> yh';
|
||||
count
|
||||
-------
|
||||
1
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ 'yh <-> pl';
|
||||
count
|
||||
-------
|
||||
0
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ 'qe <2> qt';
|
||||
count
|
||||
-------
|
||||
1
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> yh';
|
||||
count
|
||||
-------
|
||||
3
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> !yh';
|
||||
count
|
||||
-------
|
||||
432
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!yh <-> pl';
|
||||
count
|
||||
-------
|
||||
1
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!qe <2> qt';
|
||||
count
|
||||
-------
|
||||
6
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!(pl <-> yh)';
|
||||
count
|
||||
-------
|
||||
507
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!(yh <-> pl)';
|
||||
count
|
||||
-------
|
||||
508
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!(qe <2> qt)';
|
||||
count
|
||||
-------
|
||||
507
|
||||
(1 row)
|
||||
|
||||
SET enable_indexscan=OFF;
|
||||
SET enable_bitmapscan=ON;
|
||||
explain (costs off) SELECT count(*) FROM test_tsvector WHERE a @@ 'wr|qh';
|
||||
@ -260,6 +380,66 @@ SELECT count(*) FROM test_tsvector WHERE a @@ '!no_such_lexeme';
|
||||
508
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ 'pl <-> yh';
|
||||
count
|
||||
-------
|
||||
1
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ 'yh <-> pl';
|
||||
count
|
||||
-------
|
||||
0
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ 'qe <2> qt';
|
||||
count
|
||||
-------
|
||||
1
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> yh';
|
||||
count
|
||||
-------
|
||||
3
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> !yh';
|
||||
count
|
||||
-------
|
||||
432
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!yh <-> pl';
|
||||
count
|
||||
-------
|
||||
1
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!qe <2> qt';
|
||||
count
|
||||
-------
|
||||
6
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!(pl <-> yh)';
|
||||
count
|
||||
-------
|
||||
507
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!(yh <-> pl)';
|
||||
count
|
||||
-------
|
||||
508
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!(qe <2> qt)';
|
||||
count
|
||||
-------
|
||||
507
|
||||
(1 row)
|
||||
|
||||
RESET enable_seqscan;
|
||||
RESET enable_indexscan;
|
||||
RESET enable_bitmapscan;
|
||||
@ -337,6 +517,66 @@ SELECT count(*) FROM test_tsvector WHERE a @@ '!no_such_lexeme';
|
||||
508
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ 'pl <-> yh';
|
||||
count
|
||||
-------
|
||||
1
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ 'yh <-> pl';
|
||||
count
|
||||
-------
|
||||
0
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ 'qe <2> qt';
|
||||
count
|
||||
-------
|
||||
1
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> yh';
|
||||
count
|
||||
-------
|
||||
3
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!pl <-> !yh';
|
||||
count
|
||||
-------
|
||||
432
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!yh <-> pl';
|
||||
count
|
||||
-------
|
||||
1
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!qe <2> qt';
|
||||
count
|
||||
-------
|
||||
6
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!(pl <-> yh)';
|
||||
count
|
||||
-------
|
||||
507
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!(yh <-> pl)';
|
||||
count
|
||||
-------
|
||||
508
|
||||
(1 row)
|
||||
|
||||
SELECT count(*) FROM test_tsvector WHERE a @@ '!(qe <2> qt)';
|
||||
count
|
||||
-------
|
||||
507
|
||||
(1 row)
|
||||
|
||||
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;
|
||||
@ -344,14 +584,14 @@ SELECT * FROM ts_stat('SELECT a FROM test_tsvector') ORDER BY ndoc DESC, nentry
|
||||
------+------+--------
|
||||
qq | 108 | 108
|
||||
qt | 102 | 102
|
||||
qe | 100 | 100
|
||||
qh | 98 | 98
|
||||
qe | 100 | 101
|
||||
qh | 98 | 99
|
||||
qw | 98 | 98
|
||||
qa | 97 | 97
|
||||
ql | 94 | 94
|
||||
qs | 94 | 94
|
||||
qr | 92 | 93
|
||||
qi | 92 | 92
|
||||
qr | 92 | 92
|
||||
(10 rows)
|
||||
|
||||
SELECT * FROM ts_stat('SELECT a FROM test_tsvector', 'AB') ORDER BY ndoc DESC, nentry DESC, word;
|
||||
|
||||
@ -769,12 +769,90 @@ select to_tsvector('simple', 'z q') @@ '(!x | y <-> z) <-> q' AS "true";
|
||||
t
|
||||
(1 row)
|
||||
|
||||
select to_tsvector('simple', 'x y q') @@ '(!x | y) <-> y <-> q' AS "false";
|
||||
false
|
||||
-------
|
||||
f
|
||||
(1 row)
|
||||
|
||||
select to_tsvector('simple', 'x y q') @@ '(!x | !y) <-> y <-> q' AS "true";
|
||||
true
|
||||
------
|
||||
t
|
||||
(1 row)
|
||||
|
||||
select to_tsvector('simple', 'x y q') @@ '(x | !y) <-> y <-> q' AS "true";
|
||||
true
|
||||
------
|
||||
t
|
||||
(1 row)
|
||||
|
||||
select to_tsvector('simple', 'x y q') @@ '(x | !!z) <-> y <-> q' AS "true";
|
||||
true
|
||||
------
|
||||
t
|
||||
(1 row)
|
||||
|
||||
select to_tsvector('simple', 'x y q y') @@ '!x <-> y' AS "true";
|
||||
true
|
||||
------
|
||||
t
|
||||
(1 row)
|
||||
|
||||
select to_tsvector('simple', 'x y q y') @@ '!x <-> !y' AS "true";
|
||||
true
|
||||
------
|
||||
t
|
||||
(1 row)
|
||||
|
||||
select to_tsvector('simple', 'x y q y') @@ '!x <-> !!y' AS "true";
|
||||
true
|
||||
------
|
||||
t
|
||||
(1 row)
|
||||
|
||||
select to_tsvector('simple', 'x y q y') @@ '!(x <-> y)' AS "false";
|
||||
false
|
||||
-------
|
||||
f
|
||||
(1 row)
|
||||
|
||||
select to_tsvector('simple', 'x y q y') @@ '!(x <2> y)' AS "true";
|
||||
true
|
||||
------
|
||||
t
|
||||
(1 row)
|
||||
|
||||
select strip(to_tsvector('simple', 'x y q y')) @@ '!x <-> y' AS "false";
|
||||
false
|
||||
-------
|
||||
f
|
||||
(1 row)
|
||||
|
||||
select strip(to_tsvector('simple', 'x y q y')) @@ '!x <-> !y' AS "false";
|
||||
false
|
||||
-------
|
||||
f
|
||||
(1 row)
|
||||
|
||||
select strip(to_tsvector('simple', 'x y q y')) @@ '!x <-> !!y' AS "false";
|
||||
false
|
||||
-------
|
||||
f
|
||||
(1 row)
|
||||
|
||||
select strip(to_tsvector('simple', 'x y q y')) @@ '!(x <-> y)' AS "true";
|
||||
true
|
||||
------
|
||||
t
|
||||
(1 row)
|
||||
|
||||
select strip(to_tsvector('simple', 'x y q y')) @@ '!(x <2> y)' AS "true";
|
||||
true
|
||||
------
|
||||
t
|
||||
(1 row)
|
||||
|
||||
select to_tsvector('simple', 'x y q y') @@ '!foo' AS "true";
|
||||
true
|
||||
------
|
||||
|
||||
@ -51,6 +51,16 @@ 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)';
|
||||
|
||||
create index wowidx on test_tsvector using gist (a);
|
||||
|
||||
@ -70,6 +80,16 @@ 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)';
|
||||
|
||||
SET enable_indexscan=OFF;
|
||||
SET enable_bitmapscan=ON;
|
||||
@ -86,6 +106,16 @@ 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)';
|
||||
|
||||
RESET enable_seqscan;
|
||||
RESET enable_indexscan;
|
||||
@ -110,6 +140,16 @@ 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)';
|
||||
|
||||
RESET enable_seqscan;
|
||||
|
||||
|
||||
@ -147,7 +147,20 @@ select to_tsvector('simple', 'y y q') @@ '(x | y <-> !z) <-> q' AS "true";
|
||||
select to_tsvector('simple', 'x q') @@ '(x | y <-> !z) <-> q' AS "true";
|
||||
select to_tsvector('simple', 'x q') @@ '(!x | y <-> z) <-> q' AS "false";
|
||||
select to_tsvector('simple', 'z q') @@ '(!x | y <-> z) <-> q' AS "true";
|
||||
select to_tsvector('simple', 'x y q') @@ '(!x | y) <-> y <-> q' AS "false";
|
||||
select to_tsvector('simple', 'x y q') @@ '(!x | !y) <-> y <-> q' AS "true";
|
||||
select to_tsvector('simple', 'x y q') @@ '(x | !y) <-> y <-> q' AS "true";
|
||||
select to_tsvector('simple', 'x y q') @@ '(x | !!z) <-> y <-> q' AS "true";
|
||||
select to_tsvector('simple', 'x y q y') @@ '!x <-> y' AS "true";
|
||||
select to_tsvector('simple', 'x y q y') @@ '!x <-> !y' AS "true";
|
||||
select to_tsvector('simple', 'x y q y') @@ '!x <-> !!y' AS "true";
|
||||
select to_tsvector('simple', 'x y q y') @@ '!(x <-> y)' AS "false";
|
||||
select to_tsvector('simple', 'x y q y') @@ '!(x <2> y)' AS "true";
|
||||
select strip(to_tsvector('simple', 'x y q y')) @@ '!x <-> y' AS "false";
|
||||
select strip(to_tsvector('simple', 'x y q y')) @@ '!x <-> !y' AS "false";
|
||||
select strip(to_tsvector('simple', 'x y q y')) @@ '!x <-> !!y' AS "false";
|
||||
select strip(to_tsvector('simple', 'x y q y')) @@ '!(x <-> y)' AS "true";
|
||||
select strip(to_tsvector('simple', 'x y q y')) @@ '!(x <2> y)' AS "true";
|
||||
select to_tsvector('simple', 'x y q y') @@ '!foo' AS "true";
|
||||
select to_tsvector('simple', '') @@ '!foo' AS "true";
|
||||
|
||||
|
||||
Reference in New Issue
Block a user