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README change: update for hash access method

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Reported-by: Thomas Munro, Justin Pryzby

Discussion: https://postgr.es/m/CAEepm=1_682z-09DNHj4GkCJAqWK-D6h9Oq5ea84T1oqq1-Utg@mail.gmail.com
This commit is contained in:
Bruce Momjian
2018-03-29 14:38:32 -04:00
parent 8cdc834647
commit 3282c4c136
1 changed files with 2 additions and 2 deletions
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src/backend/access/hash/README
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@ -189,8 +189,8 @@ reality, InvalidBlockNumber.
After computing the ostensibly-correct bucket number based on our cached After computing the ostensibly-correct bucket number based on our cached
copy of the metapage, we lock the corresponding primary bucket page and copy of the metapage, we lock the corresponding primary bucket page and
check whether the bucket count stored in hasho_prevblkno is greater than check whether the bucket count stored in hasho_prevblkno is greater than
our the number of buckets stored in our cached copy of the metapage. If the number of buckets stored in our cached copy of the metapage. If
so, the bucket has certainly been split, because the must originally so, the bucket has certainly been split, because the count must originally
have been less than the number of buckets that existed at that time and have been less than the number of buckets that existed at that time and
can't have increased except due to a split. If not, the bucket can't have can't have increased except due to a split. If not, the bucket can't have
been split, because a split would have created a new bucket with a higher been split, because a split would have created a new bucket with a higher