On Mon, Apr 24, 2017 at 3:55 AM, Kyotaro HORIGUCHI
> While I looked into dynahash.c, I found that the following
> sentense became outdated by 5dfc198. The commit removed the only
> usage of hash_freeze().
>> * NOTE: it is possible to use hash_seq_init/hash_seq_search without any
>> * worry about hash_seq_term cleanup, if the hashtable is first locked against
>> * further insertions by calling hash_freeze. This is used by nodeAgg.c,
>> * wherein it is inconvenient to track whether a scan is still open, and
>> * there's no possibility of further insertions after readout has begun.
> The attached patch removes the sentence begins with "This is used
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