Rodrigo De Leon wrote:
On 7/7/06, T E Schmitz <[EMAIL PROTECTED]> wrote:
But that takes me to the next problem:
For the sake of the example I simplified the regular pattern.
In reality, BASE_NAME might be:
28mm
28-70mm
So the reg. expr. requires brackets:
substring (NAME, '^(\\d+(-\\d+)?mm)' ) as BASE_NAME
Actually, the pattern is more complex than that and I cannot see how I
can express it without brackets.
Maybe:
select
substring ('28-70mm LD AD Asp XR Macro', '^[\\d-]*mm' ) as BASE_NAME
Sorry, but that would also capture something like
10-30-59mm
The pattern describes either a single length (120 millimeters) or a
range (30 to 70 millimetres), hence:
\\d+(-\\d+)?mm
The ? quantifier refers to the combination of '-' and digits and has to
be bracketed.
If the brackets cannot be avoided in the expression, your original
suggestion might come in handy though:
SELECT
substring (NAME, '^\\d+(-\\d+)?mm') AS BASE_NAME ,
substr(
NAME
, char_length(
substring (NAME, '^\\d+(-\\d+)?mm')
) + 2
) AS SUFFIX
Still, I'd be interested to know whether there is a 'more elegant' solution.
--
Regards,
Tarlika Elisabeth Schmitz
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