I am doing a migration from Sybase CEP to ESP and I have a problem with regexp_firstsearch().
The capture group in the following regex works in CEP but not ESP: 'eVar30=[^`]*(\d{8})-\d{8}'
The data has long strings that contain several individual fields concatinated together in a single string. When it encounters this data: blahblahblah`eVar30=Flight:FRA-BKK-FRA:20160728-20160825`blahblahblah`
CEP correctly returns only the match inside the parenthesis: 20160728
And the companion expression 'eVar30=[^`]*\d{8}-(\d{8})' Returns: 20160825
But ESP always returns the whole matching string: eVar30=Flight:FRA-BKK-FRA:20160728-20160825
The capture group is a pretty basic feature of regular expressions, and this code makes a lot of use of it. I'm not looking for a way to parse this result string to extract the desired data. There's at least a dozen other regex expressions that are much more complicated than this one, and would be nearly impossible to parse without the capture group feature.
How do I get regex capture groups to work in ESP?
Thanks,
Dan
