Function duckdb_nparams 

pub unsafe extern "C" fn duckdb_nparams(
    prepared_statement: duckdb_prepared_statement,
) -> idx_t

Returns the number of parameters that can be provided to the given prepared statement.

Returns 0 if the query was not successfully prepared.

history:

• stable: v0.1.1

@param prepared_statement The prepared statement to obtain the number of parameters for. @return idx_t