Correction: SAS currently supports the WHERE clause (PROC SQL) and WHERE statement (PROC and DATA step), which in turn supports use of the LIKE and CONTAINS operators.
It's up to SAS users to voice their support for these types of features, through the SASWare Ballot system.
With reading the SGF paper (link below), apparently a Perl-like regular expression may be your answer. Digest at your own speed though! I tend to step away from the keyboard/cursor when it comes to Perl expressions.
Scott Barry
SBBWorks, Inc.
Workarounds for SASWare Ballot® Items
Jack Hamilton, First Health, West Sacramento, California USA
http://www2.sas.com/proceedings/sugi25/25/po/25p223.pdf