Re: ADD FOREIGN KEY (was Re: [GENERAL] 7.4Beta) - Mailing list pgsql-hackers

From Christopher Kings-Lynne
Subject Re: ADD FOREIGN KEY (was Re: [GENERAL] 7.4Beta)
Date
Msg-id 3F78095C.5080507@familyhealth.com.au
Whole thread Raw
In response to Re: ADD FOREIGN KEY (was Re: [GENERAL] 7.4Beta)  (Hannu Krosing <hannu@tm.ee>)
Responses Re: ADD FOREIGN KEY (was Re: [GENERAL] 7.4Beta)  (Shridhar Daithankar <shridhar_daithankar@persistent.co.in>)
List pgsql-hackers
>>So a db designer made a bloody mistake.
>>The problem is there's no easy way to find out what's missing.
>>I'd really like EXPLAIN to display all subsequent triggered queries 
>>also, to see the full scans caused by missing indexes.
> 
> 
> It could probably be doable for EXPLAIN ANALYZE (by actually tracing
> execution), but then you will see really _all_ queries, i.e. for a 1000
> row update you would see 1 UPDATE query and 1000 fk checks ...
> 
> OTOH, you probably can get that already from logs with right logging
> parameters.

Actually - it shouldn't be too hard to write a query that returns all 
unindexed foreign keys, surely?

Chris




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