Hi PG hackers:         When using pg_stat_statements to collect running SQL of 
PG, we find it is hard for our program to get exact operation type of the SQL,  
such as SELECT, DELETE, UPDATE, INSERT, and so on.   So we modify the the 
source code of pg_stat_statements and add another output parameter to tell us 
the operation type.Of course some application know their operation type, but 
for us and many public databases, doing this is hard. The only way is to 
reparse the SQL, obviously it is too expensive for a monitoring or diagnosis 
system.We have done the job and are willing to post a patch. I sent one through 
my work mail, but it seems that my mail didn't reach the maillist, so I try 
again by using my personal mail account.

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