diff options
Diffstat (limited to 'src/backend/optimizer/plan/createplan.c')
| -rw-r--r-- | src/backend/optimizer/plan/createplan.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/src/backend/optimizer/plan/createplan.c b/src/backend/optimizer/plan/createplan.c index 109a0145475..0884cda6070 100644 --- a/src/backend/optimizer/plan/createplan.c +++ b/src/backend/optimizer/plan/createplan.c @@ -10,13 +10,14 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/optimizer/plan/createplan.c,v 1.240 2008/04/17 21:22:14 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/optimizer/plan/createplan.c,v 1.241 2008/06/27 03:56:55 tgl Exp $ * *------------------------------------------------------------------------- */ #include "postgres.h" #include <limits.h> +#include <math.h> #include "access/skey.h" #include "nodes/makefuncs.h" @@ -2312,6 +2313,7 @@ make_append(List *appendplans, bool isTarget, List *tlist) { Append *node = makeNode(Append); Plan *plan = &node->plan; + double total_size; ListCell *subnode; /* @@ -2322,7 +2324,7 @@ make_append(List *appendplans, bool isTarget, List *tlist) plan->startup_cost = 0; plan->total_cost = 0; plan->plan_rows = 0; - plan->plan_width = 0; + total_size = 0; foreach(subnode, appendplans) { Plan *subplan = (Plan *) lfirst(subnode); @@ -2331,9 +2333,12 @@ make_append(List *appendplans, bool isTarget, List *tlist) plan->startup_cost = subplan->startup_cost; plan->total_cost += subplan->total_cost; plan->plan_rows += subplan->plan_rows; - if (plan->plan_width < subplan->plan_width) - plan->plan_width = subplan->plan_width; + total_size += subplan->plan_width * subplan->plan_rows; } + if (plan->plan_rows > 0) + plan->plan_width = rint(total_size / plan->plan_rows); + else + plan->plan_width = 0; plan->targetlist = tlist; plan->qual = NIL; |