wiki.techinc.nl/maintenance/archives/patch-protected_titles-fix-pk.sql
Reedy 267d99fa85 Convert numerous UNIQUE INDEX to PRIMARY KEY
MySQL, SQLite, PostgreSQL and MSSQL done with transitional patches.

One additional duplicate index removed from PostgreSQL schema.

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: T198811
Change-Id: I6b96a427687085c6c24bcd759c9739f81288b919
2018-07-11 20:36:33 +01:00

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SQL

ALTER TABLE /*_*/protected_titles DROP KEY /*i*/pt_namespace_title, ADD PRIMARY KEY (pt_namespace,pt_title);