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Fix build_minmax_path() to cope if an IS NULL clause turns up in the

indexable-clauses list for a btree index. Formerly it just Asserted thatall such clauses were opclauses, but that's no longer true in 8.3.Per bug #3796 from Matthias Schoeneich.

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src/backend/optimizer/plan
- planagg.c

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`‎src/backend/optimizer/plan/planagg.c`

Lines changed: 4 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -8,7 +8,7 @@`
`8`	`8`	`*`
`9`	`9`	`*`
`10`	`10`	`* IDENTIFICATION`
`11`		`- * $PostgreSQL: pgsql/src/backend/optimizer/plan/planagg.c,v 1.34 2007/11/15 21:14:36 momjian Exp $`
	`11`	`+ * $PostgreSQL: pgsql/src/backend/optimizer/plan/planagg.c,v 1.35 2007/12/03 22:37:17 tgl Exp $`
`12`	`12`	`*`
`13`	`13`	`*-------------------------------------------------------------------------`
`14`	`14`	`*/`
`@@ -368,7 +368,9 @@ build_minmax_path(PlannerInfo root, RelOptInfo rel, MinMaxAggInfo *info)`
`368`	`368`	`RestrictInforinfo= (RestrictInfo)lfirst(ll);`
`369`	`369`	`intstrategy;`
`370`	`370`
`371`		`-Assert(is_opclause(rinfo->clause));`
	`371`	`+/* Could be an IS_NULL test, if so ignore */`
	`372`	`+if (!is_opclause(rinfo->clause))`
	`373`	`+continue;`
`372`	`374`	`strategy=`
`373`	`375`	`get_op_opfamily_strategy(((OpExpr*)rinfo->clause)->opno,`
`374`	`376`	`index->opfamily[prevcol]);`

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Commitf538329

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`‎src/backend/optimizer/plan/planagg.c`

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