Star '*' operator in search bar

[GoogleCodeExporter]

Brief description of the enhancement:
Star operator '*' should be used as a wildcard during SQL values search.

Some examples:
Searching "foo*" should return all rows that contain values that starts with 
"foo" characters.
Searching "*foo*" should return all rows with values containing the "foo" 
sequence.

References with other enhancements:
See Issue 36 for a drafted grammar that contains this operator.
See related Issue 31 and Issue 35.

In SQL syntax, '*' operator should be translated to '%' operator.

Original issue reported on code.google.com by gpantane...@gmail.com on 18 Jun 2010 at 11:08