zeitgeist team mailing list archive

[Seif Lotfy <641100@xxxxxxxxxxxxxxxxxx>]

WHOA +1

On Fri, Sep 17, 2010 at 10:40 AM, Siegfried Gevatter
<rainct@xxxxxxxxxx>wrote:

> 1. +1
> 2. SQLITE sucks. Big time.
>
> --
> ZeitgeistEngine.__init__(): statement to get last row id is not using the
> index
> https://bugs.launchpad.net/bugs/641100
> You received this bug notification because you are subscribed to The
> Zeitgeist Project.
>
> Status in Zeitgeist Framework: New
>
> Bug description:
> The attached script is  creating a log with ~49k events.
> In the constructor of ZeitgeistEngine we need to search for the minimum and
> maximum event id. In the script I'm doing two different ways of getting
> these values:
>
> Our current query:
> SELECT MIN(id), MAX(id) FROM event
> -> this is not using the event index, and takes about 0.096 secunds for me
>
> do the same in two queries:
> SELECT MIN(id) FROM event    +    SELECT MAX(id) FROM event
> -> both queries are using the index, and together they take about 0.003 for
> me
>
> I suggest changing the one query into two to get some speedups.
>
>
>


-- 
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-- 
ZeitgeistEngine.__init__(): statement to get last row id is not using the index
https://bugs.launchpad.net/bugs/641100
You received this bug notification because you are a member of Zeitgeist
Framework Team, which is subscribed to Zeitgeist Framework.

Status in Zeitgeist Framework: New

Bug description:
The attached script is  creating a log with ~49k events.
In the constructor of ZeitgeistEngine we need to search for the minimum and maximum event id. In the script I'm doing two different ways of getting these values:

Our current query:
SELECT MIN(id), MAX(id) FROM event
-> this is not using the event index, and takes about 0.096 secunds for me

do the same in two queries:
SELECT MIN(id) FROM event    +    SELECT MAX(id) FROM event
-> both queries are using the index, and together they take about 0.003 for me

I suggest changing the one query into two to get some speedups.