Csaba Ringhofer created IMPALA-9576:
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Summary: Add built-in function for BINARY columns
Key: IMPALA-9576
URL: https://issues.apache.org/jira/browse/IMPALA-9576
Project: IMPALA
Issue Type: Sub-task
Reporter: Csaba Ringhofer
Hive supports a few built-in functions for BINARY columns according to
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF
Already supported in Impala for STRING:
- length (the Hive wiki doesn't mention it but it works)
- hex, unhex
- concat
- decode, encode
- substr/substring
Currently not supported in Impala for STRING:
- base64, unbase64
- binary (a special casting syntax just for BINARY)
- md5, sha, sha1, sha2, crc32
- aes_encrypt/aes_decrypt
At the first glance I think that what we should implement in Impala is:
- all the functions that already work for STRING
- base64, unbase64 (needed for text files anyway)
- binary() - may worth adding to get closer to Hive SQL, but can cause problems
as the name is the same as a keyword
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