Re: [HACKERS] Partition-wise join for join between (declaratively)partitioned tables

On Thu, Sep 21, 2017 at 8:21 AM, Ashutosh Bapat
<ashutosh.bapat@enterprisedb.com> wrote:
> About your earlier comment of making build_joinrel_partition_info()
> simpler. Right now, the code assumes that partexprs or
> nullable_partexpr can be NULL when either of them is not populated.
> That may be saves a sizeof(pointer) * (number of keys) byes of memory.
> Saving that much memory may not be worth the complexity of code. So,
> we may always allocate memory for those arrays and fill it with NIL
> values when there are no key expressions to populate those. That will
> simplify the code. I haven't done that change in this patchset. I was
> busy debugging the Q7 regression. Let me know your comments about
> that.

Hmm, I'm not sure that's the best approach, but let me look at it more
carefully before I express a firm opinion.

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company


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