Explain EXPLAIN (children 1)
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 4)
    ExpressionList (children 1)
     Asterisk
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier distributed_table
    Literal UInt64_1
    ExpressionList (children 1)
     Function toString (children 1)
      ExpressionList (children 1)
       Identifier id
