[ https://issues.apache.org/jira/browse/ARROW-5345?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wes McKinney updated ARROW-5345: -------------------------------- Fix Version/s: (was: 0.14.0) > [C++] Relax Field hashing in DictionaryMemo > ------------------------------------------- > > Key: ARROW-5345 > URL: https://issues.apache.org/jira/browse/ARROW-5345 > Project: Apache Arrow > Issue Type: Improvement > Components: C++ > Reporter: Wes McKinney > Priority: Major > > Follow up to ARROW-3144 > Currently we associate dictionaries with a hash table mapping a Field's > memory address to a dictionary id. This poses an issue if two RecordBatches > are equal (equal field names, equal types) but were instantiated separately. > We don't have a hash function in C++ for Field so we should consider > implementing one and using that instead (if it is not too expensive) so that > same but "different" (different C++ objects) won't blow up in the user's face > with an unintuitive error (this did in fact occur once in the Python test > suite, not sure exactly why it wasn't a problem before, I think it worked "by > accident") -- This message was sent by Atlassian JIRA (v7.6.3#76005)