HIVE-11330: Add early termination for recursion in StatsRulesProcFactory.evaluateExpression (Prasanth Jayachandran, reviewed by Hari Subramaniyan)
Project: http://git-wip-us.apache.org/repos/asf/hive/repo Commit: http://git-wip-us.apache.org/repos/asf/hive/commit/4ee17e53 Tree: http://git-wip-us.apache.org/repos/asf/hive/tree/4ee17e53 Diff: http://git-wip-us.apache.org/repos/asf/hive/diff/4ee17e53 Branch: refs/heads/llap Commit: 4ee17e53c194501d8eaca07c3039379b56d86d26 Parents: f312d17 Author: Hari Subramaniyan <harisan...@apache.org> Authored: Wed Jul 29 14:57:31 2015 -0700 Committer: Hari Subramaniyan <harisan...@apache.org> Committed: Wed Jul 29 14:57:31 2015 -0700 ---------------------------------------------------------------------- .../hive/ql/optimizer/stats/annotation/StatsRulesProcFactory.java | 3 +++ 1 file changed, 3 insertions(+) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/hive/blob/4ee17e53/ql/src/java/org/apache/hadoop/hive/ql/optimizer/stats/annotation/StatsRulesProcFactory.java ---------------------------------------------------------------------- diff --git a/ql/src/java/org/apache/hadoop/hive/ql/optimizer/stats/annotation/StatsRulesProcFactory.java b/ql/src/java/org/apache/hadoop/hive/ql/optimizer/stats/annotation/StatsRulesProcFactory.java index 376d42c..1663b88 100644 --- a/ql/src/java/org/apache/hadoop/hive/ql/optimizer/stats/annotation/StatsRulesProcFactory.java +++ b/ql/src/java/org/apache/hadoop/hive/ql/optimizer/stats/annotation/StatsRulesProcFactory.java @@ -301,6 +301,9 @@ public class StatsRulesProcFactory { long newNumRows = 0; Statistics andStats = null; + if (stats.getNumRows() <= 1 || stats.getDataSize() <= 0) + return 1; + if (pred instanceof ExprNodeGenericFuncDesc) { ExprNodeGenericFuncDesc genFunc = (ExprNodeGenericFuncDesc) pred; GenericUDF udf = genFunc.getGenericUDF();
