Re: [HACKERS] Page Scan Mode in Hash Index

Hi,

On 03/22/2017 09:32 AM, Ashutosh Sharma wrote:
> Done. Please refer to the attached v2 version of patch.
>

Thanks.

>>> 1) 0001-Rewrite-hash-index-scans-to-work-a-page-at-a-time.patch: this
>>> patch rewrites the hash index scan module to work in page-at-a-time
>>> mode. It basically introduces two new functions-- _hash_readpage() and
>>> _hash_saveitem(). The former is used to load all the qualifying tuples
>>> from a target bucket or overflow page into an items array. The latter
>>> one is used by _hash_readpage to save all the qualifying tuples found
>>> in a page into an items array. Apart from that, this patch bascially
>>> cleans _hash_first(), _hash_next and hashgettuple().
>>>

0001v2:

In hashgettuple() you can remove the 'currItem' and 'offnum' from the 
'else' part, and do the assignment inside
  if (so->numKilled < MaxIndexTuplesPerPage)

instead.


No new comments for 0002 and 0003.

Best regards, Jesper