Gabor Kaszab created IMPALA-10752:
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Summary: Support for UNION two structs
Key: IMPALA-10752
URL: https://issues.apache.org/jira/browse/IMPALA-10752
Project: IMPALA
Issue Type: New Feature
Components: Backend, Frontend
Reporter: Gabor Kaszab
{code:java}
select id, tiny_struct from complextypes_structs
union all
select id, tiny_struct from complextypes_structs;
{code}
Result is the following error:
{code:java}
ERROR: AnalysisException: Incompatible return types 'STRUCT<b:BOOLEAN>' and
'STRUCT<b:BOOLEAN>' of exprs 'tiny_struct' and 'tiny_struct'.
{code}
where complextypes_structs is the following (note, it is same with parquet):
{code:java}
CREATE TABLE complextypes_structs (
id int,
tiny_struct struct<b:boolean>,
small_struct struct<i:int, s:string>
) STORED AS ORC;
{code}
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