THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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The default value of table.exec.fallback-legacy-time-function is 'false' which means:
(1) the return values of function
- CURRENT_DATE
- CURRENT_TIME
- CURRENT_TIMESTAMP
- NOW()
- PROCTIME()
consider consider the local timezone and the return type of PROCTIME()/NOW()/CURRENT_TIMESTAMP is TIMESTAMP WITH LOCAL TIME ZONE, the return type of CURRENT_DATE is DATE, the return type of CURRENT_TIME is TIME.
(2) The cast between NUMERIC and TIMESTAMP is forbidden
Users can set the option to 'true', at this moment:
(1) These functions would keep the legacy behavior.
(2) The cast between NUMERIC and TIMESTAMP is supported.
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proposed changes | note |
Support function TO_TIMESTAMP_LTZ(numeric_expr, [,scale]) return type: TIMESTAMP WITH LOCAL TIME ZONE #session timezone: UTC TO_TIMESTAMP_LTZ(44) 1970-01-01 00:00:44 #session timezone: UTC+8 TO_TIMESTAMP_LTZ(-28756) 1970-01-01 00:00:44 | TO_TIMESTAMP_LTZ(numeric_expr [,scale]) TO_TIMESTAMP_LTZ(seconds, 0) TO_TIMESTAMP_LTZ(mills, 3) TO_TIMESTAMP_LTZ(nanoSeconds, 9) |
5. Support
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more conversion classes for LocalZonedTimestampType(TIMESTAMP WITH LOCAL TIME ZONE)
After we use type TIMESTAMP WITH LOCAL TIME ZONE in above functions, we can support all conversion classes like java.time.LocalDateTime, java.sql.Timestamp that TimestampType supported for LocalZonedTimestampType to resolve the UDF compatibility issue.
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