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Fix grammar in README.tuplock

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Author: Brad DeJong
Discussion: https://postgr.es/m/CAJnrtnxrA4FqZi0Z6kGPQKMiZkWv2xxgSDQ+hv1jDrf8WCKjjw@mail.gmail.com
This commit is contained in:
Alvaro Herrera 2018-07-27 10:56:30 -04:00
parent 3e32109049
commit 8a9b72c3ea
1 changed files with 4 additions and 4 deletions
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8
src/backend/access/heap/README.tuplock
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@ -45,10 +45,10 @@ and modifications which might alter the tuple's key. This is the lock that is
implicitly taken by UPDATE operations which leave all key fields unchanged.
SELECT FOR SHARE obtains a shared lock which prevents any kind of tuple
modification. Finally, SELECT FOR KEY SHARE obtains a shared lock which only
prevents tuple removal and modifications of key fields. This last mode
implements a mode just strong enough to implement RI checks, i.e. it ensures
that tuples do not go away from under a check, without blocking when some
other transaction that want to update the tuple without changing its key.
prevents tuple removal and modifications of key fields. This lock level is
just strong enough to implement RI checks, i.e. it ensures that tuples do not
go away from under a check, without blocking transactions that want to update
the tuple without changing its key.
The conflict table is: