SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Function unhex (children 1)
     ExpressionList (children 1)
      Identifier s1
    Function unhex (children 1)
     ExpressionList (children 1)
      Identifier s2
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier unhex_in_fix_string_table
