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https://issues.apache.org/jira/browse/TAJO-215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13781379#comment-13781379
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Hyunsik Choi commented on TAJO-215:
-----------------------------------
This problem is also caused when a function is called with NULL parameters. For
example, consider regexp_replace as follows:
{code}
select regexp_replace(null, '^AB', 'ab') as result;
{code}
This expression will find a function whose parameter type is (null type, text,
text). This call cannot find regexp_replace(text, text, text) function.
> Catalog should allow compatible types when finding functions
> ------------------------------------------------------------
>
> Key: TAJO-215
> URL: https://issues.apache.org/jira/browse/TAJO-215
> Project: Tajo
> Issue Type: Bug
> Components: catalog
> Reporter: Hyunsik Choi
>
> Current catalog is strong typed. Given a find request, it only can search for
> a certain function with the same argument types. However, in many cases,
> catalog should find functions with compatible parameter types.
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