Regular expression conficts with column name in EXPRESSION

[szigeti]

I don't know all the concept of EXPRESSION, but until now I was able to define regex match with it, e.g.:

    CLASS
      EXPRESSION (("[name_ref]" =~ /^[0-9]*$/) AND (length("[name_ref]")<3))
      [...]
    END

worked fine and filtered the rows where [name_ref] was a number below 100. Now the postgresql interface searched for a column named 0-9.

So, defining a column with "[col_name]" instead of [col_name] was satisfying for me, whereas the current behaviour of expression handling disables the usage of regular expression with alternative ([abc]) or exceptional ([^abc]) chars.

An ultimate solution for this problem would be a well defined and documented escaping strategy for

• column names
• regular expression
• constant matches
• functions

Anyway, the attached small patch brings back the "old behaviour", parsing column names only between "[ and ]".