check_cols	check_cols
check_count	check_count
check_data1	check_data1
check_data2	check_data2
check_data3	check_data3
check_data_frame	check_data_frame
check_date	check_date
check_flag	check_flag
check_int	check_int
check_join	check_join
check_key	check_key
check_number	check_number
check_rows	check_rows
check_scalar	check_scalar
check_string	check_string
check_time	check_time
check_unique	check_unique
check_values	check_values
check_vector	check_vector
max_integer	max_integer
max_nrow	max_nrow
min_integer	min_integer
