Potential solve for #200

[JeroennC]

Hi,

I've changed around the grammar a bit in order to support CASE WHENs being used as Conditions on their own (see #200). This means that the THENs and ELSEs have to be able to contain full expressions. One of the problems that made this not work was that Condition() would be okay with turning into a Column or a 0 or 1. I've removed this and added Conditions becoming SimpleExpressions. This does however mean that it will accept any SimpleExpression in place of a condition, for instance:

SELECT * FROM t1 WHERE 5

or

SELECT * FROM t1 WHERE a + b

Which is also why I removed one of the tests what ensure this is not parse-able. I would argue that while it may indeed not be valid SQL (depending on the DB's implementation), it is no harm if it is actually parse-able. What do you think of this?

[coveralls]

Coverage remained the same at 84.714% when pulling a990675 on JeroennC:master into 320f64a on JSQLParser:master.

[tomershay]

@JeroennC, Thanks for providing this fix. I merged it to my own custom branch to see if it's working and it worked perfectly.
@wumpz - did you consider pulling this request?

[wumpz]

already solved