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12.9.1 Bit Functions
--------------------
MySQL uses `BIGINT' (64-bit) arithmetic for bit operations, so these
operators have a maximum range of 64 bits.
* `|'
Bitwise OR:
mysql> SELECT 29 | 15;
-> 31
The result is an unsigned 64-bit integer.
* `&'
Bitwise AND:
mysql> SELECT 29 & 15;
-> 13
The result is an unsigned 64-bit integer.
* `^'
Bitwise XOR:
mysql> SELECT 1 ^ 1;
-> 0
mysql> SELECT 1 ^ 0;
-> 1
mysql> SELECT 11 ^ 3;
-> 8
The result is an unsigned 64-bit integer.
* `<<'
Shifts a longlong (`BIGINT') number to the left.
mysql> SELECT 1 << 2;
-> 4
The result is an unsigned 64-bit integer.
* `>>'
Shifts a longlong (`BIGINT') number to the right.
mysql> SELECT 4 >> 2;
-> 1
The result is an unsigned 64-bit integer.
* `~'
Invert all bits.
mysql> SELECT 5 & ~1;
-> 4
The result is an unsigned 64-bit integer.
* `BIT_COUNT(N)'
Returns the number of bits that are set in the argument N.
mysql> SELECT BIT_COUNT(29), BIT_COUNT(b'101010');
-> 4, 3
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