EXPLAIN does not work as expected for a query with url table function

[alexey-milovidov]

It performs unneeded requests:

EXPLAIN SELECT * FROM url('https://hacker-news.firebaseio.com/v0/item/{1..100}.json', JSONEachRow,　$$　id UInt32,　deleted UInt8,　type Enum('story' = 1, 'comment' = 2, 'poll' = 3, 'pollopt' = 4, 'job' = 5),　by LowCardinality(String),　time DateTime,　text String,　dead UInt8,　parent UInt32,　poll UInt32,　kids Array(UInt32),　url String,　score Int32,　title String,　parts Array(UInt32),　descendants Int32　$$)