Details
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Improvement
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Status: Resolved
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Major
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Resolution: Fixed
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Impala 2.2
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None
Description
Add support for nested loop joins in Impala. Primarily used in conjunction with nested types and in cases where non-equity join predicates are used with certain join types.
Example query that is currently not supported and could be executed when nested loop join is implemented:
select * from functional.alltypestiny t1 left outer join functional.alltypessmall t2 on t1.int_col < t2.int_col;
Also, in the context of nested types the following query could be executed using a nested loop join:
select * from customer c left outer join c.orders;