Bacula-users

Re: [Bacula-users] Performance with MySQL queries since 3.0.0 (Dir inserting attributes hang)

2009-06-18 20:04:40
Subject: Re: [Bacula-users] Performance with MySQL queries since 3.0.0 (Dir inserting attributes hang)
From: "Jari Fredriksson" <jarif AT iki DOT fi>
To: <bacula-users AT lists.sourceforge DOT net>
Date: Fri, 19 Jun 2009 03:00:54 +0300
> 
> INSERT INTO Filename( Name )
> SELECT a.Name
> FROM (
> 
> SELECT DISTINCT Name
> FROM batch
> ) AS a
> WHERE NOT
> EXISTS (
> 
> SELECT Name
> FROM Filename AS f
> WHERE f.Name = a.Name
> )
> 

That looks silly.

I would write it shorter as

INSERT INTO Filename(Name)
SELECT DISTINCT Name
FROM batch AS a
WHERE NOT EXISTS
(
    SELECT Name
    FROM Filename AS f
    WHERE f.Name = a.Name
)

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