Warn user that precision is lost when bigint is implicitly cast to double in
joins and unions.
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Key: HIVE-2427
URL: https://issues.apache.org/jira/browse/HIVE-2427
Project: Hive
Issue Type: Improvement
Reporter: Kevin Wilfong
Assignee: Kevin Wilfong
When a bigint is implicitly cast to a double (when a bigint is involved in an
equality expression with a string or double as part of a join condition, or
when a bigint column is to be combined with a string or double column as part
of a union) precision may be lost, resulting in unexpected behavior. Until we
fix the underlying issue we should throw an error in strict mode, and a warning
in nonstrict mode alerting the user about this.
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