JingsongLi commented on issue #8536: [FLINK-12568][hive] Implement OutputFormat 
to write Hive tables
URL: https://github.com/apache/flink/pull/8536#issuecomment-498123575
 
 
   > Thanks @JingsongLi , you beat me to the explanation :)
   > BTW, I'd like to confirm whether type info instances are supposed to be 
singletons? Judging from the code, it's not designed that way. So I think it's 
always safer to call `equals` to check equality (guess that's also why 
BasicTypeInfo overrides the `equals` method). Is that correct?
   
   Yes, it's always safer to call `equals` to check equality. (Scala's "==" is 
equals)

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