Hi,
I had a look at these changes and here are my observations:
1. Patch applies cleanly with "git apply'.
2. make / make install / make check-world all are good.
This patch clearly improves the planning time with given conditions.
To verify that, I have created a table like:
create table foo(a int, b int check (b > 100), c text) partition by range(a);
And then used following query to get planning time:
select * from foo where b < 100;
And on my local setup, I have observed that,
For 16 partitions, planning time was 0.234692 ms, which reduced to 0.112948 ms with this patch.
For 128 partitions, planning time was 1.62305 ms, which reduced to 0.654252 ms with this patch.
For 1024 partitions, planning time was 18.720993 ms, which reduced to 9.667395 ms with this patch.
This clearly shows an improvement in planning time.
Patch looks good to me. So passing that to the committer.
Thanks
