LOWER(x) = $n does not generate query parameter

[kevinburke1]

If I have a table like the authors table in the readme, and I have a query like

-- name: LowerAuthor :one 
SELECT * FROM authors WHERE bio = $1 AND LOWER(name) = $2

I expect this to generate LowerAuthor(ctx context.Context, params LowerAuthorParams) with two parameters, Bio and Name. Instead, I get just one parameter, Bio (which gets placed in the function string).