Re: Regular Expression Matching problem...

am 04.01.2006, um 15:08:45 +0100 mailte Mario Splivalo folgendes:
> I have a table containing regular expresion patterns for matching phone
> numbers with the mobile operators.
>
> For instance, my phone number is '+385911234567', and the regexp for
> this mobile operator is: "^\+38591\d{7}$".
>
> Now, when I do a regexp match in a single select, it behaves as
> expected:
>
> octopussy2=# select '+385911234567' ~ '^\\+38591\\d{7}$';
> ?column?
> ----------
> t
> (1 row)
>
> Now, as I've mentioned, I have a table with operators and their patterns
> for phone numbers:
>
> octopussy2=# select * from operators;
> operator_id | operator_name | operator_phonenumber_pattern
> -------------+---------------+------------------------------
> 1 | FreeSMSC | ^\\+38590\\d{6,7}$
> 2 | VipNet | ^\\+38591\\d{7}$
> 3 | T-Mobile | ^\\+3859[9|8]\\d{6,7}$
> 4 | Tele2 | ^\\+38595\\d{7}$
> (4 rows)
>
>
> Now, if I construct my query like this:
>
> octopussy2=# select '+385911234567', operator_phonenumber_pattern,
> '+385911234567' ~ operator_phonenumber_pattern from operators;
>
> ?column? | operator_phonenumber_pattern | ?column?
> ---------------+------------------------------+----------
> +385911234567 | ^\\+38590\\d{6,7}$ | f
> +385911234567 | ^\\+38591\\d{7}$ | f
> +385911234567 | ^\\+3859[9|8]\\d{6,7}$ | f
> +385911234567 | ^\\+38595\\d{7}$ | f
> (4 rows)
>
>
> Why do I get all the "f"'s? I tought that the operator_id 2 should
> return "t", esp. when I wrote the first query it seems that the regex
> match was ok.

Try this:

test=# select '+385911234567', operator_phonenumber_pattern, '+385911234567' ~ replace(operator_phonenumber_pattern,'\\\\','\\') from operators;
?column? | operator_phonenumber_pattern | ?column?
---------------+------------------------------+----------
+385911234567 | ^\\+38590\\d{6,7}$ | f
+385911234567 | ^\\+38591\\d{7}$ | t
+385911234567 | ^\\+3859[9|8]\\d{6,7}$ | f
+385911234567 | ^\\+38595\\d{7}$ | f
(4 rows)

HTH, Andreas
--
Andreas Kretschmer (Kontakt: siehe Header)
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