These functions are critical when writing functions that translate R functions to sql functions. Typically a conversion function should escape all it's inputs and return an sql object.
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Character vectors that will be combined into a single SQL
An object to escape. Existing sql vectors will be left as is,
character vectors are escaped with single quotes, numeric vectors have
Controls behaviour when multiple values are supplied.
Default behaviour: lists are always wrapped in parens and separated by commas, identifiers are separated by commas and never wrapped, atomic vectors are separated by spaces and wrapped in parens if needed.
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