On Sep 2, 2016 7:38 PM, "Jesper Pedersen" <jesper.pedersen@redhat.com> wrote:
> Could you provide a rebased patch based on Amit's v5 ?
Please find the the patch, based on Amit's V5.
I have fixed following things
1. now in "_hash_first" we check if (opaque->hasho_prevblkno == InvalidBlockNumber) to see if bucket is from older version hashindex and has been upgraded. Since as of now InvalidBlockNumber is one value greater than maximum value the variable "metap->hashm_maxbucket" can be set (see _hash_expandtable). We can distinguish it from rest. I tested the upgrade issue reported by amit. It is fixed now.
2. One case which buckets hasho_prevblkno is used is where we do backward scan. So now before testing for previous block number I test whether current page is bucket page if so we end the bucket scan (see changes in _hash_readprev). On other places where hasho_prevblkno is used it is not for bucket page, so I have not put any extra check to verify if is a bucket page.