THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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This can be configured on a per client basis by using the "set metaconf:hive.metastore.try.direct.sql.ddl=<value>" command, starting with Hive 0.14.0 (HIVE-7532).
hive.metastore.orm.retrieveMapNullsAsEmptyStrings
- Default Value:
false - Added In: Hive 1.0.0 with HIVE-8485
Thrift does not support nulls in maps, so any nulls present in maps retrieved from object-relational mapping (ORM) must be either pruned or converted to empty strings. Some backing databases such as Oracle persist empty strings as nulls, and therefore will need to have this parameter set to true in order to reverse that behavior. For others, the default pruning behavior is correct.
hive.direct.sql.max.query.length
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For WebHCat configuration, see Configuration Variables in the WebHCat manual.