condition : x | x /OR/i condition
x : y | y /AND/i y
y : "(" condition ")" | z OP z 
z : TABCOLNAME | COLNAME | VALUE
	
# Terminals
TABCOLNAME : /([a-z]{1}[\w]{0,18}[^_])\.([a-z]{1}[\w]{0,18}[^_\ ])/i
COLNAME : /([a-z]{1}[\w]{0,18}[^_\ ])/i
VALUE : /(\w+)/ix
OP : /(<>|<=|>=|=|<|>)/