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Commitf10eab7

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Make array_to_tsvector() sort and de-duplicate the given strings.
This is required for the result to be a legal tsvector value.Noted while fooling with Andreas Seltenreich's ts_delete() crash.Discussion: <87invhoj6e.fsf@credativ.de>
1 parentc50d192 commitf10eab7

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4 files changed

+52
-8
lines changed

4 files changed

+52
-8
lines changed

‎doc/src/sgml/func.sgml‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -9294,7 +9294,7 @@ CREATE TYPE rainbow AS ENUM ('red', 'orange', 'yellow', 'green', 'blue', 'purple
92949294
<entry><type>tsvector</type></entry>
92959295
<entry>convert array of lexemes to <type>tsvector</type></entry>
92969296
<entry><literal>array_to_tsvector('{fat,cat,rat}'::text[])</literal></entry>
9297-
<entry><literal>'fat' 'cat' 'rat'</literal></entry>
9297+
<entry><literal>'cat' 'fat' 'rat'</literal></entry>
92989298
</row>
92999299
<row>
93009300
<entry>

‎src/backend/utils/adt/tsvector_op.c‎

Lines changed: 42 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -416,17 +416,34 @@ tsvector_bsearch(const TSVector tsv, char *lexeme, int lexeme_len)
416416
return-1;
417417
}
418418

419+
/*
420+
* qsort comparator functions
421+
*/
422+
419423
staticint
420-
compareint(constvoid*va,constvoid*vb)
424+
compare_int(constvoid*va,constvoid*vb)
421425
{
422-
int32a=*((constint32*)va);
423-
int32b=*((constint32*)vb);
426+
inta=*((constint*)va);
427+
intb=*((constint*)vb);
424428

425429
if (a==b)
426430
return0;
427431
return (a>b) ?1 :-1;
428432
}
429433

434+
staticint
435+
compare_text_lexemes(constvoid*va,constvoid*vb)
436+
{
437+
Datuma=*((constDatum*)va);
438+
Datumb=*((constDatum*)vb);
439+
char*alex=VARDATA_ANY(a);
440+
intalex_len=VARSIZE_ANY_EXHDR(a);
441+
char*blex=VARDATA_ANY(b);
442+
intblex_len=VARSIZE_ANY_EXHDR(b);
443+
444+
returntsCompareString(alex,alex_len,blex,blex_len, false);
445+
}
446+
430447
/*
431448
* Internal routine to delete lexemes from TSVector by array of offsets.
432449
*
@@ -459,7 +476,7 @@ tsvector_delete_by_indices(TSVector tsv, int *indices_to_delete,
459476
{
460477
intkp;
461478

462-
qsort(indices_to_delete,indices_count,sizeof(int),compareint);
479+
qsort(indices_to_delete,indices_count,sizeof(int),compare_int);
463480
kp=0;
464481
for (k=1;k<indices_count;k++)
465482
{
@@ -743,32 +760,50 @@ array_to_tsvector(PG_FUNCTION_ARGS)
743760
bool*nulls;
744761
intnitems,
745762
i,
763+
j,
746764
tslen,
747765
datalen=0;
748766
char*cur;
749767

750768
deconstruct_array(v,TEXTOID,-1, false,'i',&dlexemes,&nulls,&nitems);
751769

770+
/* Reject nulls (maybe we should just ignore them, instead?) */
752771
for (i=0;i<nitems;i++)
753772
{
754773
if (nulls[i])
755774
ereport(ERROR,
756775
(errcode(ERRCODE_NULL_VALUE_NOT_ALLOWED),
757776
errmsg("lexeme array may not contain nulls")));
777+
}
758778

759-
datalen+=VARSIZE_ANY_EXHDR(dlexemes[i]);
779+
/* Sort and de-dup, because this is required for a valid tsvector. */
780+
if (nitems>1)
781+
{
782+
qsort(dlexemes,nitems,sizeof(Datum),compare_text_lexemes);
783+
j=0;
784+
for (i=1;i<nitems;i++)
785+
{
786+
if (compare_text_lexemes(&dlexemes[j],&dlexemes[i])<0)
787+
dlexemes[++j]=dlexemes[i];
788+
}
789+
nitems=++j;
760790
}
761791

792+
/* Calculate space needed for surviving lexemes. */
793+
for (i=0;i<nitems;i++)
794+
datalen+=VARSIZE_ANY_EXHDR(dlexemes[i]);
762795
tslen=CALCDATASIZE(nitems,datalen);
796+
797+
/* Allocate and fill tsvector. */
763798
tsout= (TSVector)palloc0(tslen);
764799
SET_VARSIZE(tsout,tslen);
765800
tsout->size=nitems;
801+
766802
arrout=ARRPTR(tsout);
767803
cur=STRPTR(tsout);
768-
769804
for (i=0;i<nitems;i++)
770805
{
771-
char*lex=VARDATA(dlexemes[i]);
806+
char*lex=VARDATA_ANY(dlexemes[i]);
772807
intlex_len=VARSIZE_ANY_EXHDR(dlexemes[i]);
773808

774809
memcpy(cur,lex,lex_len);

‎src/test/regress/expected/tstypes.out‎

Lines changed: 7 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1165,6 +1165,13 @@ SELECT array_to_tsvector(ARRAY['base','hidden','rebel','spaceship','strike']);
11651165

11661166
SELECT array_to_tsvector(ARRAY['base','hidden','rebel','spaceship', NULL]);
11671167
ERROR: lexeme array may not contain nulls
1168+
-- array_to_tsvector must sort and de-dup
1169+
SELECT array_to_tsvector(ARRAY['foo','bar','baz','bar']);
1170+
array_to_tsvector
1171+
-------------------
1172+
'bar' 'baz' 'foo'
1173+
(1 row)
1174+
11681175
SELECT setweight('w:12B w:13* w:12,5,6 a:1,3* a:3 w asd:1dc asd zxc:81,567,222A'::tsvector, 'c');
11691176
setweight
11701177
----------------------------------------------------------

‎src/test/regress/sql/tstypes.sql‎

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -226,6 +226,8 @@ SELECT tsvector_to_array('base hidden rebel spaceship strike'::tsvector);
226226

227227
SELECT array_to_tsvector(ARRAY['base','hidden','rebel','spaceship','strike']);
228228
SELECT array_to_tsvector(ARRAY['base','hidden','rebel','spaceship',NULL]);
229+
-- array_to_tsvector must sort and de-dup
230+
SELECT array_to_tsvector(ARRAY['foo','bar','baz','bar']);
229231

230232
SELECT setweight('w:12B w:13* w:12,5,6 a:1,3* a:3 w asd:1dc asd zxc:81,567,222A'::tsvector,'c');
231233
SELECT setweight('a:1,3A asd:1C w:5,6,12B,13A zxc:81,222A,567'::tsvector,'c');

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