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Commitee27a4f

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rum_tsquery_distance:
- use only one loop- remove allocation of extra memory
1 parent4caa336 commitee27a4f

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1 file changed

+57
-62
lines changed

1 file changed

+57
-62
lines changed

‎rum_ts_utils.c‎

Lines changed: 57 additions & 62 deletions
Original file line numberDiff line numberDiff line change
@@ -524,28 +524,30 @@ rum_extract_tsquery(PG_FUNCTION_ARGS)
524524
* reconstruct partial tsvector from set of index entries
525525
*/
526526
staticTSVector
527-
rum_reconstruct_tsvector(bool*check,TSQueryquery,int*map_item_operand,
527+
rum_reconstruct_tsvector(bool*check,int32nkeys,TSQueryquery,
528+
int*map_item_operand,
528529
Datum*addInfo,bool*addInfoIsNull)
529530
{
530531
TSVectortsv;
531-
intcntwords=0;
532+
intnWords=0,currentWord=0;
532533
inti=0;
533534
QueryItem*item=GETQUERY(query);
534535
char*operandData=GETOPERAND(query);
535-
struct
536-
{
537-
char*word;
538-
char*posptr;
539-
int32npos;
540-
int32wordlen;
541-
}*restoredWordEntry;
542536
intlen=0,totallen;
543537
WordEntry*ptr;
544538
char*str;
545539
intstroff;
546540

541+
for(i=0;i<nkeys;i++)
542+
if (check[i])
543+
nWords++;
544+
545+
totallen=CALCDATASIZE(nWords,nWords*16*sizeof(uint16));/* estimation */
546+
tsv=palloc(totallen);
547+
tsv->size=nWords;
547548

548-
restoredWordEntry=palloc(sizeof(*restoredWordEntry)*query->size);
549+
str=STRPTR(tsv);
550+
stroff=0;
549551

550552
/*
551553
* go through query to collect lexemes and add to them
@@ -560,84 +562,77 @@ rum_reconstruct_tsvector(bool *check, TSQuery query, int *map_item_operand,
560562

561563
if (check[keyN]== true)
562564
{
565+
intnpos=0;
566+
bytea*positions;
567+
563568
/*
564569
* entries could be repeated in tsquery, do not visit them twice
565570
* or more. Modifying of check array (entryRes) is safe
566571
*/
567572
check[keyN]= false;
568573

569-
restoredWordEntry[cntwords].word=operandData+item->qoperand.distance;
570-
restoredWordEntry[cntwords].wordlen=item->qoperand.length;
571-
572574
len+=item->qoperand.length;
573575

574576
if (addInfoIsNull[keyN]== false)
575577
{
576-
bytea*positions=DatumGetByteaP(addInfo[keyN]);
578+
positions=DatumGetByteaP(addInfo[keyN]);
577579

578-
restoredWordEntry[cntwords].npos=count_pos(VARDATA_ANY(positions),
579-
VARSIZE_ANY_EXHDR(positions));
580-
restoredWordEntry[cntwords].posptr=VARDATA_ANY(positions);
580+
npos=count_pos(VARDATA_ANY(positions),
581+
VARSIZE_ANY_EXHDR(positions));
581582

582583
len=SHORTALIGN(len);
583-
len+=sizeof(uint16)+
584-
restoredWordEntry[cntwords].npos*sizeof(WordEntryPos);
584+
len+=sizeof(uint16)+npos*sizeof(WordEntryPos);
585585
}
586-
else
586+
587+
while(CALCDATASIZE(nWords,len)>totallen)
587588
{
588-
restoredWordEntry[cntwords].npos=0;
589+
totallen *=2;
590+
tsv=repalloc(tsv,totallen);
591+
str=STRPTR(tsv);
589592
}
590593

591-
cntwords++;
592-
}
593-
}
594-
item++;
595-
}
594+
ptr=ARRPTR(tsv)+currentWord;
596595

597-
totallen=CALCDATASIZE(cntwords,len);
598-
tsv=palloc(totallen);
599-
SET_VARSIZE(tsv,totallen);
600-
tsv->size=cntwords;
601-
602-
ptr=ARRPTR(tsv);
603-
str=STRPTR(tsv);
604-
stroff=0;
596+
ptr->len=item->qoperand.length;
597+
ptr->pos=stroff;
598+
memcpy(str+stroff,operandData+item->qoperand.distance,ptr->len);
599+
stroff+=ptr->len;
605600

606-
for (i=0;i<cntwords;i++)
607-
{
608-
ptr->len=restoredWordEntry[i].wordlen;
609-
ptr->pos=stroff;
610-
memcpy(str+stroff,restoredWordEntry[i].word,ptr->len);
611-
stroff+=ptr->len;
601+
if (npos)
602+
{
603+
WordEntryPos*wptr,
604+
posv=0;
605+
intj;
606+
char*posptr=VARDATA_ANY(positions);
612607

613-
if (restoredWordEntry[i].npos)
614-
{
615-
WordEntryPos*wptr,
616-
post=0;
617-
intj;
608+
ptr->haspos=1;
618609

619-
ptr->haspos=1;
610+
stroff=SHORTALIGN(stroff);
611+
*(uint16*) (str+stroff)=npos;
612+
wptr=POSDATAPTR(tsv,ptr);
620613

621-
stroff=SHORTALIGN(stroff);
622-
*(uint16*) (str+stroff)=restoredWordEntry[i].npos;
623-
wptr=POSDATAPTR(tsv,ptr);
614+
for (j=0;j<npos;j++)
615+
{
616+
posptr=decompress_pos(posptr,&posv);
617+
wptr[j]=posv;
618+
}
619+
stroff+=sizeof(uint16)+npos*sizeof(WordEntryPos);
620+
}
621+
else
622+
{
623+
ptr->haspos=0;
624+
}
624625

625-
for (j=0;j<restoredWordEntry[i].npos;j++)
626-
{
627-
restoredWordEntry[i].posptr=decompress_pos(restoredWordEntry[i].posptr,&post);
628-
wptr[j]=post;
626+
currentWord++;
629627
}
630-
stroff+=sizeof(uint16)+restoredWordEntry[i].npos*sizeof(WordEntryPos);
631-
}
632-
else
633-
{
634-
ptr->haspos=0;
635628
}
636629

637-
ptr++;
630+
item++;
638631
}
639632

640-
pfree(restoredWordEntry);
633+
Assert(nWords==currentWord);
634+
totallen=CALCDATASIZE(nWords,len);
635+
SET_VARSIZE(tsv,totallen);
641636

642637
returntsv;
643638
}
@@ -649,15 +644,15 @@ rum_tsquery_distance(PG_FUNCTION_ARGS)
649644

650645
/* StrategyNumber strategy = PG_GETARG_UINT16(1); */
651646
TSQueryquery=PG_GETARG_TSQUERY(2);
652-
/*int32nkeys = PG_GETARG_INT32(3); */
647+
int32nkeys=PG_GETARG_INT32(3);
653648
Pointer*extra_data= (Pointer*)PG_GETARG_POINTER(4);
654649
Datum*addInfo= (Datum*)PG_GETARG_POINTER(8);
655650
bool*addInfoIsNull= (bool*)PG_GETARG_POINTER(9);
656651
float8res;
657652
int*map_item_operand= (int*) (extra_data[0]);
658653
TSVectortsv;
659654

660-
tsv=rum_reconstruct_tsvector(check,query,map_item_operand,
655+
tsv=rum_reconstruct_tsvector(check,nkeys,query,map_item_operand,
661656
addInfo,addInfoIsNull);
662657

663658
res=DatumGetFloat4(DirectFunctionCall2Coll(ts_rank_tt,

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