On Mon, Dec 13, 2004 at 06:17:27PM +0000, Adam Witney wrote: > > I am trying to select a part of a text field based on a regular expression, > the data looks like this > > Rv0001c_f > Rv0002_r > Rv1003c_r > > Etc > > I would like to be able to select like this (this is a regular expression I > would do in perl) > > SELECT substring(primer_name, '(\w+)\d\d\d\d[c]*_[fr]$') from primer;
The "POSIX Regular Expressions" section in the manual contains the following note: Remember that the backslash (\) already has a special meaning in PostgreSQL string literals. To write a pattern constant that contains a backslash, you must write two backslashes in the statement. SELECT substring(primer_name, '(\\w+)\\d\\d\\d\\d[c]*_[fr]$') FROM primer; substring ----------- Rv Rv Rv (3 rows) Is that what you're after? -- Michael Fuhr http://www.fuhr.org/~mfuhr/ ---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED])
