These functions are critical when writing functions that translate R functions to sql functions. Typically a conversion function should escape all its inputs and return an sql object.
sql(...)is.sql(x)as.sql(x, con)
Arguments
...: Character vectors that will be combined into a single SQL expression.
x: Object to coerce
con: Needed when x is directly supplied from the user so that schema specifications can be quoted using the correct identifiers.