Safely interpolate values into an SQL string
A database connection.
A SQL string containing variables to interpolate.
Variables must start with a question mark and can be any valid R
identifier, i.e. it must start with a letter or
Named values (for
If you are implementing an SQL backend with non-ANSI quoting rules, you'll
need to implement a method for
sqlParseVariables(). Failure to
do so does not expose you to SQL injection attacks, but will (rarely) result
in errors matching supplied and interpolated variables.
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