Re: [HACKERS] Adding support for Default partition in partitioning

Hi,

I have worked further on V21 patch set, rebased it on latest master commit,

addressed the comments given by Robert, Ashutosh and others.

The attached tar has a series of 7 patches.

Here is a brief of these 7 patches:

0001:

Refactoring existing ATExecAttachPartition  code so that it can be used for

default partitioning as well

0002:

This patch teaches the partitioning code to handle the NIL returned by

get_qual_for_list().

This is needed because a default partition will not have any constraints in case

it is the only partition of its parent.

0003:

Support for default partition with the restriction of preventing addition of any

new partition after default partition.

0004:

Store the default partition OID in pg_partition_table, this will help us to

retrieve the OID of default relation when we don't have the relation cache

available. This was also suggested by Amit Langote here[1].

0005:

Extend default partitioning support to allow addition of new partitions.

0006:

Extend default partitioning validation code to reuse the refactored code in

patch 0001. 

0007:

This patch introduces code to check if the scanning of default partition child

can be skipped if it's constraints are proven.

TODO:

Add documentation.

Merge default range partitioning patch.