anchor.diff:      | expr XOR expr
       | expr AND expr
       | expr AND_ expr
  -
       | LP_ expr RP_
       | NOT expr
       | NOT_ expr
  
positive.code:     ;
  
  groupByItem
      : (columnName | NUMBER |expr)  (ASC|DESC)?
      ;
  
negative.code:     | simpleExpr collateClause
      //| param_marker
      //| variable
      | simpleExpr AND_ simpleExpr
      | PLUS simpleExpr
      | MINUS simpleExpr
  