Re: Performance trouble finding records through related records

Andy Colson wrote:
>
> For your query, I think a join would be the best bet, can we see its
> explain analyze?
>

Here is a few variations:

SELECT events_events.* FROM events_events WHERE transactionid IN (
SELECT transactionid FROM events_eventdetails customerDetails
WHERE customerDetails.keyname='customer_id'
AND substring(customerDetails.value,0,32)='1957'
AND transactionid IS NOT NULL
) ORDER BY id LIMIT 50;

-- http://explain.depesz.com/s/Pnb

explain analyze SELECT events_events.* FROM events_events,
events_eventdetails customerDetails
WHERE events_events.transactionid = customerDetails.transactionid
AND customerDetails.keyname='customer_id'
AND substring(customerDetails.value,0,32)='1957'
AND customerDetails.transactionid IS NOT NULL
ORDER BY id LIMIT 50;

-- http://explain.depesz.com/s/rDh

explain analyze SELECT events_events.* FROM events_events
JOIN events_eventdetails customerDetails
ON events_events.transactionid = customerDetails.transactionid
AND customerDetails.keyname='customer_id'
AND substring(customerDetails.value,0,32)='1957'
AND customerDetails.transactionid IS NOT NULL
ORDER BY id LIMIT 50;

-- http://explain.depesz.com/s/6aB

Thanks for your efforts!

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