──BITAND(string1─┬───────────────────────┬─)──────
└─,─┬────────┬─┬──────┬─┘
└─string2┘ └─,pad─┘
BITAND returns a string composed of the two input strings logically compared, bit by bit, using the AND operator. The length of the result is the length of the longer of the two strings. If no pad character is provided, the AND operation terminates when the shorter of the two strings is exhausted, and the unprocessed portion of the longer string is appended to the partial result. If pad is provided, it is used to extend the shorter of the two strings on the right, before carrying out the logical operation. The default for string2 is the zero length (null) string.
Here are some examples:
BITAND('73'x,'27'x) -> '23'x
BITAND('13'x,'5555'x) -> '1155'x
BITAND('13'x,'5555'x,'74'x) -> '1154'x
BITAND('pQrS',,'DF'x) -> 'PQRS' /* ASCII only */