On Wed, 04 Feb 2015 08:22:21 +0100 OC <o...@ocs.cz> wrote: > Hello there, > > I've just bumped into a need to fetch based on a textual qualifier > which I can't create. My records in one column contain tab-separated > pairs of tags and text, like in > > "foo:foo value<TAB>bar:blahblah<TAB>bax:this is the value of bax" > > I need to fetch the rows whose value of given tag contains a string. > > If it were "begins with", the solution would be a simple LIKE, but > with "contains", the problem is that e.g., "LIKE '%foo%bax'" would > select the sample row above, although the value for 'foo' is 'foo > value' and does not contain 'bax' at all. > > Is there some trick to do this at fetch with some smart qualifier (in > FrontBase)? Or is there no better approach than to fetch all "LIKE > '%foo%bax'" rows, and filter them further in memory e.g., using a > regexp? > > Thanks a lot, > OC >
A few ideas. MySQL has a regexp function that you can use in searches. Does FrontBase also? If it is not too difficult to set up a qualifier using that, it may work. Also, it occurs to me that when I have had this problem, I sometimes change the string to: :foo:foo value<TAB>bar:blahblah<TAB>bax:this is the value of bax: The the regexp becomes simpler. There are no edge cases for the first and last key-value pair. It is too bad you cannot break those tags up into a table for the tags themselves. That would make it all much easier. - ray _______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
