Mark Grover created HIVE-3859:
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Summary: Expand UDF method selection logic in Function Registry
Key: HIVE-3859
URL: https://issues.apache.org/jira/browse/HIVE-3859
Project: Hive
Issue Type: Sub-task
Components: UDF
Affects Versions: 0.9.0
Reporter: Mark Grover
Presently, the Function Registry uses a constant cost of conversion to decide
which method to call. This has worked well until now but wouldn't work when
Decimal types get introduced (HIVE-2693). The reason being that a double and a
decimal may be good candidates for conversion of an int but with the present
costing strategy, they both will have the same cost of conversion. This leads
to ambiguity when Hive tries to decide which method in the UDF to call if the
UDF implements methods for both double and decimal.
This needs to get resolved before the decimal code gets committed.
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