SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier x
   Function or (children 1)
    ExpressionList (children 3)
     Identifier A
     Identifier B
     Function and (children 1)
      ExpressionList (children 2)
       Identifier B
       Identifier C
   Set
