CreateQuery initial_table_size (children 2)
 Identifier initial_table_size
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 3)
    ExpressionList (children 3)
     Identifier engine_full
     Identifier total_rows
     Identifier total_bytes
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier system.tables
    Function and (children 1)
     ExpressionList (children 2)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier name
        Literal \'join_test\'
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier database
        Function currentDatabase (children 1)
         ExpressionList
