Re: "RETURNING PRIMARY KEY" syntax extension

On 02/07/14 15:16, Ian Barwick wrote:
> On 14/07/01 23:13, Robert Haas wrote:
>> On Tue, Jul 1, 2014 at 8:00 AM, Rushabh Lathia <rushabh(dot)lathia(at)gmail(dot)com> wrote:
>>> .) In map_primary_key_to_list() patch using INDEX_ATTR_BITMAP_IDENTITY_KEY
>>> bitmap to get the keycols. In IndexAttrBitmapKind there is also
>>> INDEX_ATTR_BITMAP_KEY, so was confuse between INDEX_ATTR_BITMAP_KEY and
>>> INDEX_ATTR_BITMAP_IDENTITY_KEY and also haven't found related comments in
>>> the code. Later with use of testcase and debugging found confirmed that
>>> INDEX_ATTR_BITMAP_IDENTITY_KEY only returns the Primary key.
>>
>> Actually, that depends on how REPLICA IDENTITY is set. IOW, you can't
>> assume that will give you the primary key.
>
> Damn, fooled by the name. Thanks for the info; I'll rework the patch
> accordingly.

Attached version implements an IndexAttrBitmapKind "INDEX_ATTR_BITMAP_PRIMARY_KEY",
which will return the primary key column(s). Note this would require a catalog
version bump.

Regards

Ian Barwick

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Ian Barwick http://www.2ndQuadrant.com/
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