Gbase 8C bit string operator (I)

Bit string operator

In addition to the commonly used comparison operators , You can also use the following operators .&,| and # The bit string operands of must be equal in length . In displacement , Keep the original bit string length （ And 0 fill ）.

1. ||

describe ： Connect between bit strings . Example ：

gbase=# SELECT B'10001' || B'011' AS RESULT;

result

----------

10001011

(1 row)

Single field internal continuous connection operation is not recommended to exceed 180 Time . If exceeded 180 Time , It needs to be split into multiple contiguous strings , Then perform the connection operation between them . for example ：str1||str2||str3||str4 Split into (str1||str2)||(str3||str4).

1. &

describe ： Between bit strings “ And ” operation . Example ：

gbase=# SELECT B'10001' & B'01101' AS RESULT;

result

--------

00001

(1 row)

1. |

describe ： Between bit strings “ or ” operation . Example ：

gbase=# SELECT B'10001' | B'01101' AS RESULT;

result

--------

11101

(1 row)

1. #

describe ： If the bit strings are inconsistent “ or ” operation . If the corresponding position in both bit strings is 1 Or, the position returns 0. Example ：

gbase=# SELECT B'10001' # B'01101' AS RESULT;

result

--------

11100

(1 row)

1. ~

describe ： Between bit strings “ Not ” operation . Example ：

gbase=# SELECT ~B'10001'AS RESULT;

result

----------

01110

(1 row)

1. <<

describe ： Shift the bit string to the left . Example ：

gbase=# SELECT B'10001' << 3 AS RESULT;

result

----------

01000

(1 row)

1. >>

describe ： Shift the bit string to the right . Example ：

gbase=# SELECT B'10001' >> 2 AS RESULT;

result

----------

00100

(1 row)