I just updated all R packages, including sqldf today. Then I continued to receive the warning message as follows:
Warning message: Quoted identifiers should have class SQL, use DBI::SQL() if the caller performs the quoting.
What is the problem? Is this warning serious? How to fix it?
Update:
This happens after updating sqldf and related packages. The sqldf("select * from something order by something") command used by me sqldf("select * from something order by something")
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