DBI (version 0.5-1)

sqlInterpolate: Safely interpolate values into an SQL string

Description

Safely interpolate values into an SQL string

Usage

sqlInterpolate(`_con`, `_sql`, ...)

Arguments

_con

A database connection.

...

Named values to interpolate into string. All strings will be first escaped with dbQuoteString prior to interpolation to protect against SQL injection attacks.

`_sql`

A SQL string containing 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 ., and be followed by a letter, digit, . or _.

Backend authors

If you are implementing a 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.

Examples

sql <- "SELECT * FROM X WHERE name = ?name"
sqlInterpolate(ANSI(), sql, name = "Hadley")

# This is safe because the single quote has been double escaped
sqlInterpolate(ANSI(), sql, name = "H'); DROP TABLE--;")