Yida Wu created IMPALA-14145:
--------------------------------
Summary: WHERE filter results incorrectly with rand() as constant
expression
Key: IMPALA-14145
URL: https://issues.apache.org/jira/browse/IMPALA-14145
Project: IMPALA
Issue Type: Bug
Affects Versions: Impala 5.0.0
Reporter: Yida Wu
When using rand() in a query, the behavior can be inconsistent between constant
expressions and conditions in subqueries.
For example:
{code:java}
SELECT * FROM (SELECT rand() AS rd) t1 WHERE rd < 0.1;
{code}
Returns:
{code:java}
+---------------------+
| rd |
+---------------------+
| 0.47849725790014347 |
+---------------------+
{code}
The value of rd is larger than 0.1, but it still passes the filter rd < 0.1.
This seems incorrect.
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