SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 3)
    Identifier _database
    Identifier _table
    Identifier n
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function merge (children 1)
       ExpressionList (children 2)
        Function REGEXP (children 1)
         ExpressionList (children 1)
          Literal \'^01902_db_params\'
        Literal \'^t\'
   ExpressionList (children 3)
    OrderByElement (children 1)
     Identifier _database
    OrderByElement (children 1)
     Identifier _table
    OrderByElement (children 1)
     Identifier n
