Zhuoluo Yang created FLINK-6068:
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Summary: Support If() in built in function of TableAPI
Key: FLINK-6068
URL: https://issues.apache.org/jira/browse/FLINK-6068
Project: Flink
Issue Type: Improvement
Reporter: Zhuoluo Yang
Assignee: Zhuoluo Yang
Most sql system support if() as an built-in udf. However, we didn't register
the if() in the function category. A great many of our users use syntax 'if(a,
b, c)'. Also most sql systems support 'if(a, b, c)' syntax.
Mysql:
https://dev.mysql.com/doc/refman/5.7/en/control-flow-functions.html#function_if
Hive:
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-ConditionalFunctions
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