Type:
Task
Priority:
Major
Resolution:
Fixed
SYS_GUID is an Oracle function, similar to the UUID function in mariadb, the document link is:
https://docs.oracle.com/en/database/oracle/oracle-database/12.2/sqlrf/SYS_GUID.html#GUID-761E36B4-32DA-497D-8829-3D4653381F9B
there are two difference between sys_guid and uuid in mariadb :
output format: the output of sys_guid without '-' character.
use different algorithms,please note the red font in the example
1. Execute sys_guid multiple times in a session, and add 1 to the 12th byte of output each time
2. execute sys_guid in different sessions, the 6~16 bytes and last 4 bytes of output are different
example for oracle sys_guid
SQL> SELECT SYS_GUID() FROM DUAL;
SYS_GUID()
--------------------------------
B4F9C877B126 4B49E05315500A0A222B
SQL> SELECT SYS_GUID() FROM DUAL;
SYS_GUID()
--------------------------------
B4F9C877B127 4B49E05315500A0A222B
SQL> SELECT SYS_GUID() FROM DUAL;
SYS_GUID()
--------------------------------
B4F9C877B1284B49 E05315500A0A222B
start new session and execute sys_guid
SQL> SELECT SYS_GUID() FROM DUAL;
SYS_GUID()
--------------------------------
B4F9CCEB9C1A4CBD E05315500A0AA3C2
SQL> SELECT SYS_GUID() FROM DUAL;
SYS_GUID()
--------------------------------
B4F9CCEB9C1B 4CBDE05315500A0AA3C2
SQL> SELECT SYS_GUID() FROM DUAL;
SYS_GUID()
--------------------------------
B4F9CCEB9C1C 4CBDE05315500A0AA3C2
I have implemented SYS_ GUID, the behavior and algorithms are the same as UUID, but the output format is different.
MariaDB [(none)]> select sys_guid();
+----------------------------------+
| sys_guid() |
+----------------------------------+
| 4FE31C7B2F8E11EB8DAAA87EEAED1F75 |
+----------------------------------+
1 row in set ( 0.000 sec)
MariaDB [(none)]> select sys_guid();
+----------------------------------+
| sys_guid() |
+----------------------------------+
| 50DEAB622F8E11EB8DAAA87EEAED1F75 |
+----------------------------------+
is part of
MDEV-19162
Some basic datatypes and functions in oracle compatibility mode do not work
Open
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add my patch