Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change
 
PerlMonks  

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

by ctilmes (Priest)
on Jun 21, 2004 at 11:44 UTC ( #368413=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.

This may or may not be fast - it depends on how the query engine runs, and whether the optimizer can use an index when you apply a function on a column.

Probably premature optimization unless there are a lot of users, but PostgreSQL support indexes on expressions:
http://www.postgresql.org/docs/7.4/interactive/indexes-expressional.html.

As always, "explain" can be used to examine the optimizer's query plan.

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

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://368413]
help
Chatterbox?
and a log crumbles through the grate...

How do I use this? | Other CB clients
Other Users?
Others chanting in the Monastery: (4)
As of 2017-02-25 23:48 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    Before electricity was invented, what was the Electric Eel called?






    Results (369 votes). Check out past polls.