BIT_COUNT(<expr> bigint|boolean)

> SELECT bit_count(5);
 2

BIT_GET(<expr> bigint|boolean, <pos> integer)

> SELECT bit_get(11, 0);
 1
> SELECT bit_get(11, 2);
 0

GETBIT(<expr> bigint|boolean, <pos> integer)

> SELECT getbit(11, 0);
 1
> SELECT getbit(11, 2);
 0