Movatterモバイル変換

[0]ホーム
URL:

Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly

 Sign up
Appearance settings

Commit4ade4fe

Browse files
committed
Fix ltreeparentsel so it actually works ...
1 parent0f0a330 commit4ade4fe

File tree

1 file changed

+26
-133
lines changed

1 file changed

+26
-133
lines changed

‎contrib/ltree/ltree_op.c‎

Lines changed: 26 additions & 133 deletions
Original file line numberDiff line numberDiff line change
@@ -1,19 +1,18 @@
11
/*
22
* op function for ltree
33
* Teodor Sigaev <teodor@stack.net>
4-
* $PostgreSQL: pgsql/contrib/ltree/ltree_op.c,v 1.10 2006/04/26 22:32:36 momjian Exp $
4+
* $PostgreSQL: pgsql/contrib/ltree/ltree_op.c,v 1.11 2006/04/27 18:24:35 tgl Exp $
55
*/
66

77
#include"ltree.h"
8+
89
#include<ctype.h>
910

10-
#include"access/heapam.h"
11-
#include"catalog/pg_statistic.h"
12-
#include"nodes/relation.h"
1311
#include"utils/lsyscache.h"
1412
#include"utils/selfuncs.h"
1513
#include"utils/syscache.h"
1614

15+
1716
/* compare functions */
1817
PG_FUNCTION_INFO_V1(ltree_cmp);
1918
PG_FUNCTION_INFO_V1(ltree_lt);
@@ -34,6 +33,8 @@ PG_FUNCTION_INFO_V1(ltree_textadd);
3433
PG_FUNCTION_INFO_V1(lca);
3534
PG_FUNCTION_INFO_V1(ltree2text);
3635
PG_FUNCTION_INFO_V1(text2ltree);
36+
PG_FUNCTION_INFO_V1(ltreeparentsel);
37+
3738
Datumltree_cmp(PG_FUNCTION_ARGS);
3839
Datumltree_lt(PG_FUNCTION_ARGS);
3940
Datumltree_le(PG_FUNCTION_ARGS);
@@ -576,11 +577,7 @@ ltreeparentsel(PG_FUNCTION_ARGS)
576577
VariableStatDatavardata;
577578
Node*other;
578579
boolvaronleft;
579-
Datum*values;
580-
intnvalues;
581-
float4*numbers;
582-
intnnumbers;
583-
doubleselec=0.0;
580+
doubleselec;
584581

585582
/*
586583
* If expression is not variable <@ something or something <@ variable,
@@ -601,131 +598,27 @@ ltreeparentsel(PG_FUNCTION_ARGS)
601598
PG_RETURN_FLOAT8(0.0);
602599
}
603600

604-
if (HeapTupleIsValid(vardata.statsTuple))
601+
if (IsA(other,Const))
605602
{
606-
Form_pg_statisticstats;
607-
doublemcvsum=0.0;
608-
doublemcvsel=0.0;
609-
doublehissel=0.0;
610-
611-
stats= (Form_pg_statistic)GETSTRUCT(vardata.statsTuple);
612-
613-
if (IsA(other,Const))
614-
{
615-
/* Variable is being compared to a known non-null constant */
616-
Datumconstval= ((Const*)other)->constvalue;
617-
boolmatch= false;
618-
inti;
619-
620-
/*
621-
* Is the constant "<@" to any of the column's most common values?
622-
*/
623-
if (get_attstatsslot(vardata.statsTuple,
624-
vardata.atttype,vardata.atttypmod,
625-
STATISTIC_KIND_MCV,InvalidOid,
626-
&values,&nvalues,
627-
&numbers,&nnumbers))
628-
{
629-
FmgrInfocontproc;
630-
631-
fmgr_info(get_opcode(operator),&contproc);
632-
633-
for (i=0;i<nvalues;i++)
634-
{
635-
/* be careful to apply operator right way 'round */
636-
if (varonleft)
637-
match=DatumGetBool(FunctionCall2(&contproc,
638-
values[i],
639-
constval));
640-
else
641-
match=DatumGetBool(FunctionCall2(&contproc,
642-
constval,
643-
values[i]));
644-
645-
/* calculate total selectivity of all most-common-values */
646-
mcvsum+=numbers[i];
647-
648-
/* calculate selectivity of matching most-common-values */
649-
if (match)
650-
mcvsel+=numbers[i];
651-
}
652-
}
653-
else
654-
{
655-
/* no most-common-values info available */
656-
values=NULL;
657-
numbers=NULL;
658-
i=nvalues=nnumbers=0;
659-
}
660-
661-
free_attstatsslot(vardata.atttype,values,nvalues,NULL,0);
662-
663-
/*
664-
* Is the constant "<@" to any of the column's histogram values?
665-
*/
666-
if (get_attstatsslot(vardata.statsTuple,
667-
vardata.atttype,vardata.atttypmod,
668-
STATISTIC_KIND_HISTOGRAM,InvalidOid,
669-
&values,&nvalues,
670-
NULL,NULL))
671-
{
672-
FmgrInfocontproc;
673-
674-
fmgr_info(get_opcode(operator),&contproc);
675-
676-
for (i=0;i<nvalues;i++)
677-
{
678-
/* be careful to apply operator right way 'round */
679-
if (varonleft)
680-
match=DatumGetBool(FunctionCall2(&contproc,
681-
values[i],
682-
constval));
683-
else
684-
match=DatumGetBool(FunctionCall2(&contproc,
685-
constval,
686-
values[i]));
687-
/* count matching histogram values */
688-
if (match)
689-
hissel++;
690-
}
691-
692-
if (hissel>0.0)
693-
{
694-
/*
695-
* some matching values found inside histogram, divide
696-
* matching entries number by total histogram entries to
697-
* get the histogram related selectivity
698-
*/
699-
hissel /=nvalues;
700-
}
701-
}
702-
else
703-
{
704-
/* no histogram info available */
705-
values=NULL;
706-
i=nvalues=0;
707-
}
708-
709-
free_attstatsslot(vardata.atttype,values,nvalues,
710-
NULL,0);
711-
712-
713-
/*
714-
* calculate selectivity based on MCV and histogram result
715-
* histogram selectivity needs to be scaled down if there are any
716-
* most-common-values
717-
*/
718-
selec=mcvsel+hissel* (1.0-mcvsum);
719-
720-
/*
721-
* don't return 0.0 selectivity unless all table values are inside
722-
* mcv
723-
*/
724-
if (selec==0.0&&mcvsum!=1.0)
725-
selec=DEFAULT_PARENT_SEL;
726-
}
727-
else
728-
selec=DEFAULT_PARENT_SEL;
603+
/* Variable is being compared to a known non-null constant */
604+
Datumconstval= ((Const*)other)->constvalue;
605+
FmgrInfocontproc;
606+
doublemcvsum;
607+
doublemcvsel;
608+
609+
fmgr_info(get_opcode(operator),&contproc);
610+
611+
/*
612+
* Is the constant "<@" to any of the column's most common values?
613+
*/
614+
mcvsel=mcv_selectivity(&vardata,&contproc,constval,varonleft,
615+
&mcvsum);
616+
617+
/*
618+
* We have the exact selectivity for values appearing in the MCV list;
619+
* use the default selectivity for the rest of the population.
620+
*/
621+
selec=mcvsel+DEFAULT_PARENT_SEL* (1.0-mcvsum);
729622
}
730623
else
731624
selec=DEFAULT_PARENT_SEL;

0 commit comments

Comments
 (0)
[8]ページ先頭
©2009-2025 Movatter.jp