Re: Write Ahead Logging for Hash Indexes

On 09/13/2016 07:41 AM, Amit Kapila wrote:
>> README:
>> +in_complete split flag.  The reader algorithm works correctly, as it will
>> scan
>>
>> What flag ?
>>
>
> in-complete-split flag which indicates that split has to be finished
> for that particular bucket.  The value of these flags are
> LH_BUCKET_NEW_PAGE_SPLIT and LH_BUCKET_OLD_PAGE_SPLIT for new and old
> bucket respectively.  It is set in hasho_flag in special area of page.
> I have slightly expanded the definition in README, but not sure if it
> is good idea to mention flags defined in hash.h. Let me know, if still
> it is unclear or you want some thing additional to be added in README.
>

I think it is better now.

>> hashxlog.c:
>>
>> hash_xlog_move_page_contents
>> hash_xlog_squeeze_page
>>
>> Both have "bukcetbuf" (-> "bucketbuf"), and
>>
>> +               if (BufferIsValid(bukcetbuf));
>>
>> ->
>>
>> +               if (BufferIsValid(bucketbuf))
>>
>> and indent following line:
>>
>> LockBufferForCleanup(bukcetbuf);
>>
>> hash_xlog_delete
>>
>> has the "if" issue too.
>>
>
> Fixed all the above cosmetic issues.
>

I meant there is an extra ';' on the "if" statements:

+               if (BufferIsValid(bukcetbuf)); <--

in hash_xlog_move_page_contents, hash_xlog_squeeze_page and 
hash_xlog_delete.

Best regards, Jesper