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  1. Hive
  2. HIVE-24157

Strict mode to fail on CAST timestamp <-> numeric

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      There is some interest in enforcing that CAST numeric <-> timestamp is disallowed to avoid confusion among users, e.g., SQL standard does not allow numeric <-> timestamp casting, timestamp type is timezone agnostic, etc.

      We should introduce a strict config for timestamp (similar to others before): If the config is true, we shall fail while compiling the query with a meaningful message.

      To provide similar behavior, Hive has multiple functions that provide clearer semantics for numeric to timestamp conversion (and vice versa):
      https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-DateFunctions

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              kgyrtkirk Zoltan Haindrich
              jcamachorodriguez Jesus Camacho Rodriguez
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