svn commit: r1583797 - /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/stats/annotation/StatsRulesProcFactory.java

[rhbutani]

Author: rhbutani
Date: Tue Apr  1 21:30:11 2014
New Revision: 1583797

URL: http://svn.apache.org/r1583797
Log:
HIVE-6797 Add protection against divide by zero in stats annotation (Prasanth J 
via Harish Butani)

Modified:
    
hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/stats/annotation/StatsRulesProcFactory.java

Modified: 
hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/stats/annotation/StatsRulesProcFactory.java
URL: 
http://svn.apache.org/viewvc/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/stats/annotation/StatsRulesProcFactory.java?rev=1583797&r1=1583796&r2=1583797&view=diff
==============================================================================
--- 
hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/stats/annotation/StatsRulesProcFactory.java
 (original)
+++ 
hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/stats/annotation/StatsRulesProcFactory.java
 Tue Apr  1 21:30:11 2014
@@ -1115,7 +1115,7 @@ public class StatsRulesProcFactory {
         // number of distincts should not change. Update the distinct count 
only when
         // the output number of rows is less than input number of rows.
         if (ratio <= 1.0) {
-          newDV = Math.round(ratio * oldDV);
+          newDV = (long) Math.ceil(ratio * oldDV);
         }
         cs.setNumNulls(newNumNulls);
         cs.setCountDistint(newDV);