Mehant Baid created DRILL-3460:
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Summary: Implement function validation in Drill
Key: DRILL-3460
URL: https://issues.apache.org/jira/browse/DRILL-3460
Project: Apache Drill
Issue Type: Improvement
Reporter: Mehant Baid
Assignee: Mehant Baid
Fix For: 1.3.0
Since the schema of the table is not known during the validation phase of
Calcite, Drill ends up skipping most of the validation checks in Calcite.
This causes certain problems at execution time, for example when we fail
function resolution or function execution due to incorrect types provided to
the function. The worst manifestation of this problem is in the case when Drill
tries to apply implicit casting and produces incorrect results. There are cases
when its fine the apply the implicit cast but it doesn't make sense for a
particular function.
This JIRA is aimed to provide a new approach to be able to perform validation
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