From: Shigeru Hanada <hanada@metrosystems.co.jp>
Date: Fri, 25 Feb 2011 02:36:40 +0000 (+0900)
Subject: Use get_relation_data_width() to get average data width.
X-Git-Url: http://git.postgresql.org/gitweb/static/gitweb.js?a=commitdiff_plain;h=d41fb4aa1c7454aef71ec0264bb3320a7f6a8ca7;p=users%2Fhanada%2Fpostgres.git

Use get_relation_data_width() to get average data width.
---

diff --git a/contrib/postgresql_fdw/postgresql_fdw.c b/contrib/postgresql_fdw/postgresql_fdw.c
index 89b5790123..39bd1be49f 100644
--- a/contrib/postgresql_fdw/postgresql_fdw.c
+++ b/contrib/postgresql_fdw/postgresql_fdw.c
@@ -715,26 +715,21 @@ static void
 estimate_costs(PlannerInfo *root, RelOptInfo *baserel, Cost *startup_cost, Cost *total_cost)
 {
 	RangeTblEntry  *rte;
-	int				width;
 	double			connection_cost = 0.0;
 	double			transfer_cost = 0.0;
 
 	elog(DEBUG3, "%s() called", __FUNCTION__);
 
-	/*
-	 * Use cost_seqscan() to get approximate value.
-	 */
+	/* get avarage width estimation */
 	rte = planner_rt_fetch(baserel->relid, root);
-//	cost_seqscan(&path->path, root, baserel);
-
-	width = get_relation_data_width(rte->relid, NULL);
+	baserel->width = get_relation_data_width(rte->relid, baserel->attr_widths);
 
 	/* XXX arbitrary guesses */
 	connection_cost = 10.0;
 	transfer_cost = 1.0;
 	*startup_cost += connection_cost;
 	*total_cost += connection_cost;
-	*total_cost += transfer_cost * width * baserel->tuples;
+	*total_cost += transfer_cost * baserel->width * baserel->tuples;
 }
 
 /* ============================================================================