Search Postgresql Archives

Re: Quick Regex Question

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




<Snip>
Howard Cole wrote:
Hi Marijn, Andreas,

I think Andreas is right, note the ordering of characters in the above example as [ ^] rather than [^ ]. So if the '^' is taken as literal '^', can I check for the beginning of a string in the brackets,
Why do you need to? Check for the beginning of the string BEFORE the set brackets. The point of set brackets is "match from a set of chars". Since "beginning of string" can only match one place, it has no meaning as a member of a set. Or in other words, if it has meaning, it needs to be matched FIRST out of the set, and therefore you can just remove from the set and put before the set brackets.
or am I forced to use the (^| ) syntax?


Is it just me or are regular expressions crazy?
Complicated, not crazy.

Terry


Howard

---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
      choose an index scan if your joining column's datatypes do not
      match


---------------------------(end of broadcast)---------------------------
TIP 4: Have you searched our list archives?

              http://archives.postgresql.org/

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Postgresql Jobs]     [Postgresql Admin]     [Postgresql Performance]     [Linux Clusters]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Postgresql & PHP]     [Yosemite]
  Powered by Linux