Jinfeng Ni created DRILL-429:
--------------------------------
Summary: explicit cast function call should be removed when input
type is same as target type.
Key: DRILL-429
URL: https://issues.apache.org/jira/browse/DRILL-429
Project: Apache Drill
Issue Type: Bug
Reporter: Jinfeng Ni
Assignee: Jinfeng Ni
If the expression has an explicit cast function call, the code has a bug when
the input type is same as the target type.
For instance, castBIGINT(bigint_col). Since there is no function
implementation for casting from bigint to bigint, the code will try to insert
an implicit cast on top of the input. It will end up with
castBIGINT(castFLOAT4(bigint_col)). This is inefficient, and in some case, it
could cause query failure.
We should remove the explicit cast function call, if we see the input type is
same as the target type.
--
This message was sent by Atlassian JIRA
(v6.2#6252)
