From 234373df1143d53296ccc9ad92997f22c3ef28ca Mon Sep 17 00:00:00 2001
From: Javier Goizueta <jgoizueta@gmail.com>
Date: Mon, 10 Apr 2017 08:08:59 +0200
Subject: [PATCH] Replace unnecessary count

---
 scripts-available/CDB_EstimateRowCount.sql | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/scripts-available/CDB_EstimateRowCount.sql b/scripts-available/CDB_EstimateRowCount.sql
index 353b963..6be76b0 100644
--- a/scripts-available/CDB_EstimateRowCount.sql
+++ b/scripts-available/CDB_EstimateRowCount.sql
@@ -3,10 +3,12 @@ CREATE OR REPLACE FUNCTION _CDB_GenerateStats(reloid REGCLASS)
 RETURNS VOID
 AS $$
 DECLARE
-  num_cols INTEGER;
+  has_stats BOOLEAN;
 BEGIN
-  SELECT COUNT(*) FROM pg_catalog.pg_statistic WHERE starelid = reloid INTO num_cols;
-  IF num_cols = 0 THEN
+  SELECT EXISTS (
+    SELECT * FROM pg_catalog.pg_statistic WHERE starelid = reloid
+  ) INTO has_stats;
+  IF NOT has_stats THEN
     EXECUTE Format('ANALYZE %s;', reloid);
   END IF;
 END