[calcite] branch master updated: [CALCITE-3287] Union in RelMdRowCount.java doesn't take into account 'union all' (Hong Shen)

[hyuan]

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The following commit(s) were added to refs/heads/master by this push:
     new 9693817  [CALCITE-3287] Union in RelMdRowCount.java doesn't take into 
account 'union all' (Hong Shen)
9693817 is described below

commit 9693817df9421fda9a727d03b225f686f5393def
Author: 沈洪 <yuling...@alipay.com>
AuthorDate: Sun Aug 25 21:30:52 2019 +0800

    [CALCITE-3287] Union in RelMdRowCount.java doesn't take into account 'union 
all' (Hong Shen)
    
    Close #1410
---
 core/src/main/java/org/apache/calcite/rel/metadata/RelMdRowCount.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git 
a/core/src/main/java/org/apache/calcite/rel/metadata/RelMdRowCount.java 
b/core/src/main/java/org/apache/calcite/rel/metadata/RelMdRowCount.java
index 0550e61..53784f7 100644
--- a/core/src/main/java/org/apache/calcite/rel/metadata/RelMdRowCount.java
+++ b/core/src/main/java/org/apache/calcite/rel/metadata/RelMdRowCount.java
@@ -91,6 +91,9 @@ public class RelMdRowCount
       }
       rowCount += partialRowCount;
     }
+    if (!rel.all) {
+      rowCount *= 0.5;
+    }
     return rowCount;
   }