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Re^4: Backslash and Underscore problem with DBI and PostgreSQL.

by Seumas (Curate)
on Jun 21, 2004 at 23:58 UTC ( #368585=note: print w/replies, xml ) Need Help??


in reply to Re^3: Backslash and Underscore problem with DBI and PostgreSQL.
in thread Backslash and Underscore problem with DBI and PostgreSQL.

I didn't expect lower() to have much of a speed impact and the query plan shows that the difference between doing a straight '=' or '~~*' and lower() is only 44msec versus 54msec.

My indexes are pretty tight and it's a well (and often) maintained database. With millions of records, it has to be. :)

The reason I didn't use LIKE is that I'm trying to allow users to create usernames that contain any characters they want without having to manually escape dozens of special characters myself.
  • Comment on Re^4: Backslash and Underscore problem with DBI and PostgreSQL.

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[Corion]: But I have a very positive experience with a four day workweek and a three day weekend. I can't easily go back though to full money.
[Corion]: That is easy without having to pay for a house, a wife or children though. If I had any of these, or any two of these, the decision wouldn't be that easy.
[ambrus]: wait. I understand no wife and children, but how do you not have to pay for a house?
[hippo]: I had a low-paid job about 20 years ago and seriously considered going down to a 3-day week. Would have worked 60% of the time for about 80% of the cash.
[Corion]: ambrus: Well, I pay rent, but don't own a house with variable/ unforeseeable costs
[hippo]: The thesholds/benefits balance at the time was nuts.
[hippo]: But that doesn't last because, you know ... politicians. :(
[Corion]: hippo: Yeah, if you still get enough money to get by and don't have expensive hobbies or other fixed costs that can work out well
[ambrus]: ah good. I pay only rent too. but that still costs significant money.
[Corion]: ambrus: Yes, but that is already budgeted for

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