rymarm opened a new pull request, #33:
URL: https://github.com/apache/drill-site/pull/33

   I've added a few details regarding regular expression syntax and added 
examples of how to enable different [regular expression 
flags(modes)](https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/regex/Pattern.html#field.summary).
 And added a note regarding line terminators, so users could be familiar why 
the following query returns `false`: 
   ```
   select regexp_matches('ab
   c', '.*');
   +--------+
   | EXPR$0 |
   +--------+
   | false  |
   +--------+
   
   ```


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