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.

In Section Seekers of Perl Wisdom