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Teach CLUSTER to use seqscan-and-sort when it's faster than indexscan.

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... or at least, when the planner's cost estimates say it will be faster.

Leonardo Francalanci, reviewed by Itagaki Takahiro and Tom Lane
This commit is contained in:
Tom Lane
2010-10-07 20:00:28 -04:00
parent 694c56af2b
commit 3ba11d3df2
14 changed files with 716 additions and 141 deletions
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src/include/optimizer/planner.h
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@@ -37,4 +37,6 @@ extern Plan *subquery_planner(PlannerGlobal *glob, Query *parse,
extern Expr *expression_planner(Expr *expr);
extern bool plan_cluster_use_sort(Oid tableOid, Oid indexOid);
#endif /* PLANNER_H */