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Commit6cb1c02

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Rewrite OR indexscan processing to be more flexible. We can now for the
first time generate an OR indexscan for a two-column index when the WHEREcondition is like 'col1 = foo AND (col2 = bar OR col2 = baz)' --- before,the OR had to be on the first column of the index or we'd not notice thepossibility of using it. Some progress towards extracting OR indexscansfrom subclauses of an OR that references multiple relations, too, althoughthis code is #ifdef'd out because it needs more work.
1 parent037e2fc commit6cb1c02

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11 files changed

+448
-503
lines changed

11 files changed

+448
-503
lines changed

‎src/backend/nodes/copyfuncs.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -15,7 +15,7 @@
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.270 2003/12/30 23:53:14 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.271 2004/01/04 00:07:32 tgl Exp $
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*
2020
*-------------------------------------------------------------------------
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*/
@@ -1172,7 +1172,7 @@ _copyRestrictInfo(RestrictInfo *from)
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COPY_SCALAR_FIELD(canjoin);
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COPY_BITMAPSET_FIELD(left_relids);
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COPY_BITMAPSET_FIELD(right_relids);
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COPY_NODE_FIELD(subclauseindices);/* XXX probably bad */
1175+
COPY_NODE_FIELD(orclause);
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COPY_SCALAR_FIELD(eval_cost);
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COPY_SCALAR_FIELD(this_selec);
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COPY_SCALAR_FIELD(mergejoinoperator);

‎src/backend/nodes/outfuncs.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.223 2003/12/30 23:53:14 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.224 2004/01/04 00:07:32 tgl Exp $
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*
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* NOTES
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* Every node type that can appear in stored rules' parsetrees *must*
@@ -1077,7 +1077,7 @@ _outRestrictInfo(StringInfo str, RestrictInfo *node)
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WRITE_BOOL_FIELD(canjoin);
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WRITE_BITMAPSET_FIELD(left_relids);
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WRITE_BITMAPSET_FIELD(right_relids);
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WRITE_NODE_FIELD(subclauseindices);
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WRITE_NODE_FIELD(orclause);
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WRITE_OID_FIELD(mergejoinoperator);
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WRITE_OID_FIELD(left_sortop);
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WRITE_OID_FIELD(right_sortop);

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