change sp_helptext to sp_columns for fixing "No view definition found" and "undefined method `match' for nil"

[leckylao]

fixed "No view definition found" and NoMethodError - undefined method `match' for nil:NilClass: by changing sp_helptext to sp_columns

[metaskills]

Thanks for the offer to help, but this will end up breaking some of our more detailed view support. The sp_columns does not return the view definition. We use sp_helptext as a secondary back when the views SQL is too long which is rare. Instead I have fixed the views_real_column_name method to be a bit more defensive when sp_helptext fails silently due to permission issues. Please find this in the upcoming v4.2.1 release.