LikeBigCat commented on issue #5209: when parse SQL with many parameters, 
SQLParseEngine#parse0 method will be very slow
URL: 
https://github.com/apache/incubator-shardingsphere/issues/5209#issuecomment-614993607
 
 
   for every "new" SQL, parse engine should re-parse. Parse need spend lots 
times. I don't think it's a problem.
   my problem is  when parse SQL with a lot of parameters   and the number of 
parameters is uncertain,the number of parameters may be 500 or 501,unable to 
cache 。
   Why the number of parameters is so large that parsing is slow ??I think this 
is a problem
   

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