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query_tree_mutator should copy RangeTblEntry nodes even when it's not

planning to modify them itself. Otherwise we end up with shared RTEsubstructure, which breaks inheritance_planner because the rte->inhflag needs to be independent in each copied subquery. Per bug reportfrom Chris Piker.

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src/backend/optimizer/util
- clauses.c

1 file changed

-9

lines changed

`‎src/backend/optimizer/util/clauses.c`

Lines changed: 4 additions & 9 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/util/clauses.c,v 1.155 2003/11/29 19:51:51 pgsql Exp $`
	`11`	`+ * $PostgreSQL: pgsql/src/backend/optimizer/util/clauses.c,v 1.156 2003/12/09 01:56:20 tgl Exp $`
`12`	`12`	`*`
`13`	`13`	`* HISTORY`
`14`	`14`	`* AUTHORDATEMAJOR EVENT`
`@@ -2960,36 +2960,31 @@ query_tree_mutator(Query *query,`
`2960`	`2960`	`RangeTblEntryrte= (RangeTblEntry)lfirst(rt);`
`2961`	`2961`	`RangeTblEntry*newrte;`
`2962`	`2962`
	`2963`	`+FLATCOPY(newrte,rte,RangeTblEntry);`
`2963`	`2964`	`switch (rte->rtekind)`
`2964`	`2965`	`{`
`2965`	`2966`	`caseRTE_RELATION:`
`2966`	`2967`	`caseRTE_SPECIAL:`
`2967`		`-/nothing to do,don't bother tomake a copy /`
	`2968`	`+/wedon't bother tocopy eref, aliases, etc; OK? /`
`2968`	`2969`	`break;`
`2969`	`2970`	`caseRTE_SUBQUERY:`
`2970`	`2971`	`if (!(flags&QTW_IGNORE_RT_SUBQUERIES))`
`2971`	`2972`	`{`
`2972`		`-FLATCOPY(newrte,rte,RangeTblEntry);`
`2973`	`2973`	`CHECKFLATCOPY(newrte->subquery,rte->subquery,Query);`
`2974`	`2974`	`MUTATE(newrte->subquery,newrte->subquery,Query*);`
`2975`		`-rte=newrte;`
`2976`	`2975`	`}`
`2977`	`2976`	`break;`
`2978`	`2977`	`caseRTE_JOIN:`
`2979`	`2978`	`if (!(flags&QTW_IGNORE_JOINALIASES))`
`2980`	`2979`	`{`
`2981`		`-FLATCOPY(newrte,rte,RangeTblEntry);`
`2982`	`2980`	`MUTATE(newrte->joinaliasvars,rte->joinaliasvars,List*);`
`2983`		`-rte=newrte;`
`2984`	`2981`	`}`
`2985`	`2982`	`break;`
`2986`	`2983`	`caseRTE_FUNCTION:`
`2987`		`-FLATCOPY(newrte,rte,RangeTblEntry);`
`2988`	`2984`	`MUTATE(newrte->funcexpr,rte->funcexpr,Node*);`
`2989`		`-rte=newrte;`
`2990`	`2985`	`break;`
`2991`	`2986`	`}`
`2992`		`-FastAppend(&newrt,rte);`
	`2987`	`+FastAppend(&newrt,newrte);`
`2993`	`2988`	`}`
`2994`	`2989`	`query->rtable=FastListValue(&newrt);`
`2995`	`2990`	`returnquery;`

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Commit2d83e7c

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`‎src/backend/optimizer/util/clauses.c`

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