okumin commented on code in PR #6896:
URL: https://github.com/apache/hive/pull/6896#discussion_r4325996516


##########
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFAesDecrypt.java:
##########
@@ -31,6 +31,8 @@
     + "Key lengths of 128, 192 or 256 bits can be used. 192 and 256 bits keys 
can be used if "
     + "Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction 
Policy Files are installed. "
     + "If either argument is NULL or the key length is not one of the 
permitted values, the return value is NULL.\n"
+    + "Note: this function uses AES in ECB mode (AES/ECB/PKCS5Padding, 
MySQL-style) with no IV and no "

Review Comment:
   How compatible is this with MySQL?



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