wiki.techinc.nl/maintenance/archives/patch-querycache_info-fix-pk.sql at 12cac7cca9ecba19c6ffa8adf992f3de58e76af6 - Thijs/wiki.techinc.nl - Techinc Git

Thijs/wiki.techinc.nl

Reedy 0f13fff160 Convert UNIQUE keys into PRIMARY KEY

WMF DBAs have been doing a massive effort to convert UNIQUE KEYS into
PRIMARY KEY.

Having a PK is essential to do maintenance, specially on large tasks.
By not having a PK it is impossible to add it in a safe way if not done
directly on the master.

Having a PK means that we can easily change the PK into another one if
needed in the future. The ones we chose might not be the best ones, but
will allow us to get them changed.

Bug: T172514
Change-Id: Id635297838938c7c5dfe65d45285a4d16d65152d

2017-08-29 18:25:37 +01:00

1 line

85 B

SQL

Raw Blame History

ALTER TABLE /*_*/querycache_info DROP KEY /*i*/qci_type, ADD PRIMARY KEY (qci_type);