# The function should return NULL if any of its arguments are NULL.
SELECT RPAD(NULL, 5, 'x') AS result;
result
NULL
SELECT RPAD(NULL, NULL, 'x') AS result;
result
NULL
SELECT RPAD(NULL, NULL, NULL) AS result;
result
NULL
SELECT RPAD('a', NULL, 'x') AS result;
result
NULL
SELECT RPAD('a', NULL, NULL) AS result;
result
NULL
SELECT RPAD('a', 5, NULL) AS result;
result
NULL
SELECT RPAD(NULL, 5, NULL) AS result;
result
NULL
# The function should return an empty string if len is 0.
SELECT RPAD('a', 0, 'x') AS result;
result

SELECT RPAD('a', 0, '') AS result;
result

SELECT RPAD('', 0, 'x') AS result;
result

SELECT RPAD('', 0, '') AS result;
result

# The function should return NULL if len is negative.
SELECT RPAD('a', -1, 'x');
RPAD('a', -1, 'x')
NULL
# Min signed long long int:
SELECT RPAD('a', -9223372036854775808, 'x');
RPAD('a', -9223372036854775808, 'x')
NULL
# Min signed long long int - 1
SELECT RPAD('a', -9223372036854775809, 'x');
RPAD('a', -9223372036854775809, 'x')
NULL
Warnings:
Warning	1292	Truncated incorrect DECIMAL value: '-9223372036854775809'
Warning	1292	Truncated incorrect DECIMAL value: '-9223372036854775809'
# The function should return NULL with a warning if len is larger than
# max_allowed_packet.
# Max signed long long int:
SELECT RPAD('a', 9223372036854775807, 'x');
RPAD('a', 9223372036854775807, 'x')
NULL
Warnings:
Warning	1301	Result of rpad() was larger than max_allowed_packet (67108864) - truncated
# Max signed long long int + 1:
SELECT RPAD('a', 9223372036854775808, 'x');
RPAD('a', 9223372036854775808, 'x')
NULL
Warnings:
Warning	1301	Result of rpad() was larger than max_allowed_packet (67108864) - truncated
# Max unsigned long long int:
SELECT RPAD('a', 18446744073709551615, 'x');
RPAD('a', 18446744073709551615, 'x')
NULL
Warnings:
Warning	1301	Result of rpad() was larger than max_allowed_packet (67108864) - truncated
# Max unsigned long long int + 1:
SELECT RPAD('a', 18446744073709551616, 'x');
RPAD('a', 18446744073709551616, 'x')
NULL
Warnings:
Warning	1292	Truncated incorrect DECIMAL value: '18446744073709551616'
Warning	1292	Truncated incorrect DECIMAL value: '18446744073709551616'
Warning	1301	Result of rpad() was larger than max_allowed_packet (67108864) - truncated
# The function should return an empty string if padstr is empty.
SELECT RPAD('a', 5, '') AS result;
result

SELECT RPAD('a', 5, '') AS result;
result

# The function should do nothing if str is of length len.
SELECT RPAD('12345', 5, 'x');
RPAD('12345', 5, 'x')
12345
# The function should chop the string if len is shorter than the length
# of str.
SELECT RPAD('123456787890', 1, 'x');
RPAD('123456787890', 1, 'x')
1
SELECT RPAD('123456787890', 5, 'x');
RPAD('123456787890', 5, 'x')
12345
# The function should right pad with padstr so that the string is len
# bytes long if str is shorter than len.
SELECT RPAD('123', 5, 'x');
RPAD('123', 5, 'x')
123xx
# The function should repeat padstr also if it has mulitplie characters.
SELECT RPAD('a', 5, 'xy');
RPAD('a', 5, 'xy')
axyxy