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Commitb88e978

Browse files
committed
Cleanup of OR processing.
1 parent7665e7b commitb88e978

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4 files changed

+160
-163
lines changed

4 files changed

+160
-163
lines changed

‎src/backend/optimizer/path/indxpath.c

Lines changed: 14 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.22 1998/08/02 07:10:38 momjian Exp $
11+
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.23 1998/08/03 05:49:19 momjian Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -307,17 +307,23 @@ match_index_orclause(RelOptInfo *rel,
307307
List*other_matching_indices)
308308
{
309309
Node*clause=NULL;
310-
List*matched_indices;
310+
List*matching_indices=other_matching_indices;
311311
List*index_list=NIL;
312312
List*clist;
313313

314+
/* first time through, we create index list */
315+
if (!other_matching_indices)
316+
{
317+
foreach(clist,or_clauses)
318+
matching_indices=lcons(NIL,matching_indices);
319+
}
320+
elsematching_indices=other_matching_indices;
321+
322+
index_list=matching_indices;
323+
314324
foreach(clist,or_clauses)
315325
{
316326
clause=lfirst(clist);
317-
if (other_matching_indices)
318-
matched_indices=lfirst(other_matching_indices);
319-
else
320-
matched_indices=NIL;
321327

322328
if (is_opclause(clause)&&
323329
op_class(((Oper*) ((Expr*)clause)->oper)->opno,
@@ -333,14 +339,10 @@ match_index_orclause(RelOptInfo *rel,
333339
index)&&
334340
IsA(get_rightop((Expr*)clause),Const))))
335341
{
336-
matched_indices=lcons(index,matched_indices);
342+
lfirst(matching_indices)=lcons(index,lfirst(matching_indices));
337343
}
338344

339-
/* for the first index, we are creating the indexids list */
340-
index_list=lappend(index_list,matched_indices);
341-
342-
if (other_matching_indices)
343-
other_matching_indices=lnext(other_matching_indices);
345+
matching_indices=lnext(matching_indices);
344346
}
345347
return (index_list);
346348

‎src/tools/backend/flow.fig

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‎src/tools/backend/flow.jpg

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‎src/tools/backend/index.html

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Original file line numberDiff line numberDiff line change
@@ -20,23 +20,23 @@ <H2 ALIGN=CENTER>
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<IMGsrc="flow.jpg"usemap="#flowmap"alt="flowchart">
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</CENTER>
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<MAPname="flowmap">
23-
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24-
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<AREACOORDS="430,820,600,870"HREF="backend_dirs.html#storage">
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<AREACOORDS="110,900,280,950"HREF="backend_dirs.html#access">
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<AREACOORDS="340,900,500,950"HREF="backend_dirs.html#nodes">
39+
<AREACOORDS="20,990,180,1030"HREF="backend_dirs.html#bootstrap">
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</MAP>
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<BR>
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<P>

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