Michael Malak created HIVE-4022: ----------------------------------- Summary: Avro SerDe queries don't handle hard-coded nulls for optional/nullable structs Key: HIVE-4022 URL: https://issues.apache.org/jira/browse/HIVE-4022 Project: Hive Issue Type: Bug Components: Serializers/Deserializers Reporter: Michael Malak
Related to HIVE-3528, There is in fact a null-struct test case in line 14 of https://github.com/apache/hive/blob/15cc604bf10f4c2502cb88fb8bb3dcd45647cf2c/data/files/csv.txt The test script at https://github.com/apache/hive/blob/12d6f3e7d21f94e8b8490b7c6d291c9f4cac8a4f/ql/src/test/queries/clientpositive/avro_nullable_fields.q does indeed work. But in that test, the query gets all of its data from a test table verbatim: INSERT OVERWRITE TABLE as_avro SELECT * FROM test_serializer; If instead we stick in a hard-coded null for the struct directly into the query, it fails: INSERT OVERWRITE TABLE as_avro SELECT string1, int1, tinyint1, smallint1, bigint1, boolean1, float1, double1, list1, map1, null, enum1, nullableint, bytes1, fixed1 FROM test_serializer; with the following error: FAILED: SemanticException [Error 10044]: Line 1:23 Cannot insert into target table because column number/types are different 'as_avro': Cannot convert column 10 from void to struct<sint:int,sboolean:boolean,sstring:string>. Note, though, that substituting a hard-coded null for string1 (and restoring struct1 into the query) does work: INSERT OVERWRITE TABLE as_avro SELECT null, int1, tinyint1, smallint1, bigint1, boolean1, float1, double1, list1, map1, struct1, enum1, nullableint, bytes1, fixed1 FROM test_serializer; -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira