Ruby on Rails

Brynjolfur Thorvardsson wrote in post #1037658:

> (SELECT uid2 AS uid, status FROM friendships WHERE uid1 = 1)
> UNION
> (SELECT uid1,status FROM friendships WHERE uid2 = 1)

It works fine, but it is slow :(

Only one entry per friendship (1 500 000 rows in database)

SELECT with UNION: 1.2108 sek

Dublicate entryes ( total 3 000 000 rows in database)

SELECT without UNION: 0.0007 sek

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