SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 4)
    Identifier name
    Function length (children 1)
     ExpressionList (children 1)
      Identifier attribute.names
    Identifier element_count
    Function round (children 1)
     ExpressionList (children 2)
      Identifier load_factor
      Literal UInt64_4
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.dictionaries
   Function and (children 1)
    ExpressionList (children 2)
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier database
       Function currentDatabase (children 1)
        ExpressionList
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier name
       Literal \'dict_sharded_multi\'
