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From Jörn Franke <>
Subject Re: Dynamic partition pruning
Date Wed, 19 Dec 2018 08:28:09 GMT
Can you please provide us more details:
Number of rows in each table and per partition, the table structure, hive version, table format,
is table sorted or partitioned on dt?

Why don’t you use a join, potentially with a mapjoin hint?

> Am 19.12.2018 um 09:02 schrieb Prabhakar Reddy <>:
> Hello,
> I have a table large_table with more than 50K partitions and when I run below query it
is running for ever.The other table small_table2 has only five partitions and when ever I
run below query it seems to be scanning all partitions rather than scanning only five partitions
which are there in smaller table.
> select * from large_table a  where a.dt in (select dt from small_table2) limit 5;
> Could you please confirm if this is the expected behavior or any way we can tune this
query to fetch results faster?
> Regards
> Prabhakar Reddy

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