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From Eli Levine <elilev...@gmail.com>
Subject Column missing from COUNT(column)
Date Thu, 02 Feb 2017 22:29:06 GMT
Greetings! I have encountered what appears to be a bug in Calcite while
working on the Pig adapter [1].

This query:

select deptno + 4, sum(sal), sum(3 + sal), 2 * count(sal)
from emp
group by deptno

produces the following plan:

LogicalProject(EXPR$0=[+($0, 4)], EXPR$1=[$1], EXPR$2=[$2], EXPR$3=[*(2,
$3)])
  LogicalAggregate(group=[{0}], EXPR$1=[SUM($1)], EXPR$2=[SUM($2)],
agg#2=[COUNT()])
    LogicalProject(DEPTNO=[$7], SAL=[$5], $f2=[+(3, $5)])
      LogicalTableScan(table=[[CATALOG, SALES, EMP]])

Note that the COUNT aggregate call does not have an associated column
reference, unlike other aggregate calls. Is this expected? Poking around
SqlToRelConverter is proving fairly involved, so I would like to make sure
this is actually an issue before sinking more time into it.

Thanks!

Eli

[1] https://issues.apache.org/jira/browse/CALCITE-1598

<https://issues.apache.org/jira/browse/CALCITE-1598>

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