ClickHouse支持with开头的查询语句

[allen12921]

根据 https://clickhouse.com/docs/zh/sql-reference/statements/select/with/
Cliskhouse应该支持with开头的查询语句

[codecov]

Codecov Report

Base: 75.95% // Head: 75.95% // No change to project coverage 👍

Coverage data is based on head (d24262d) compared to base (813a16e).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1915   +/-   ##
=======================================
  Coverage   75.95%   75.95%           
=======================================
  Files          91       91           
  Lines       14196    14196           
=======================================
  Hits        10782    10782           
  Misses       3414     3414           

Impacted Files	Coverage Δ
sql/engines/clickhouse.py	71.48% <100.00%> (ø)

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