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From "Victoria Markman (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-3002) Can't plan inequality queries when scalar subquery has an expression with at least one distinct aggregate
Date Sat, 09 May 2015 00:13:59 GMT
Victoria Markman created DRILL-3002:
---------------------------------------

             Summary: Can't plan inequality queries when scalar subquery has an expression
with at least one distinct aggregate
                 Key: DRILL-3002
                 URL: https://issues.apache.org/jira/browse/DRILL-3002
             Project: Apache Drill
          Issue Type: Bug
          Components: Query Planning & Optimization
    Affects Versions: 1.0.0
            Reporter: Victoria Markman
            Assignee: Jinfeng Ni


Fails with mix of of distinct/non distinct scalar aggregates on the same column:
{code}
0: jdbc:drill:schema=dfs> select * from t1 where a1 > ( select count(a2) + count(distinct
a2) from t2);
Error: SYSTEM ERROR: This query cannot be planned possibly due to either a cartesian join
or an inequality join
[Error Id: 69c0feda-6284-4a76-b1f7-bbc43a099a20 on atsqa4-133.qa.lab:31010] (state=,code=0)
{code}

Works with two distinct aggregates in expression:
{code}
0: jdbc:drill:schema=dfs> select * from t1 where a1 > ( select count(distinct a2) +
count(distinct a2) from t2);
+------------+------------+------------+
|     a1     |     b1     |     c1     |
+------------+------------+------------+
+------------+------------+------------+
No rows selected (0.226 seconds)
{code}

Fails with two distinct aggregates on different columns:
{code}
0: jdbc:drill:schema=dfs> select * from t1 where a1 > ( select count(distinct a2) +
count(distinct b2) from t2);
Error: SYSTEM ERROR: This query cannot be planned possibly due to either a cartesian join
or an inequality join


[Error Id: 80b10ec8-add6-45fd-8f1a-1e68852936a2 on atsqa4-133.qa.lab:31010] (state=,code=0)
0: jdbc:drill:schema=dfs> 
{code}

Works with two non distinct scalar aggregates:
{code}
0: jdbc:drill:schema=dfs> select * from t1 where a1 > ( select count(a2) + count(a2)
from t2);
+------------+------------+------------+
|     a1     |     b1     |     c1     |
+------------+------------+------------+
+------------+------------+------------+
No rows selected (0.244 seconds)
{code}



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