MariaDB starting with 10.3
--------------------------
SEQUENCEs were introduced in MariaDB 10.3.

Syntax
------

PREVIOUS VALUE FOR sequence_name

or

LASTVAL(sequence_name)

or in Oracle mode (SQL_MODE=ORACLE)

sequence_name.currval

PREVIOUS VALUE FOR is IBM DB2 syntax while LASTVAL() is PostgreSQL syntax.

Description
-----------

Get last value in the current connection generated from a sequence.

* If the sequence has not yet been used by the connection, PREVIOUS VALUE FOR
returns NULL (the same thing applies with a new connection which doesn't see a
last value for an existing sequence).
* If a SEQUENCE has been dropped and re-created then it's treated as a new
SEQUENCE and PREVIOUS VALUE FOR will return NULL.
* FLUSH TABLES has no effect on PREVIOUS VALUE FOR.
* Previous values for all used sequences are stored per connection until
connection ends.
* PREVIOUS VALUE FOR requires the SELECT privilege.

Example
-------

CREATE SEQUENCE s START WITH 100 INCREMENT BY 10;

SELECT PREVIOUS VALUE FOR s;
+----------------------+
| PREVIOUS VALUE FOR s |
+----------------------+
|                 NULL |
+----------------------+

# The function works for sequences only, if the table is used an error is
generated
SELECT PREVIOUS VALUE FOR t;
ERROR 4089 (42S02): 'test.t' is not a SEQUENCE

# Call the NEXT VALUE FOR s:
SELECT NEXT VALUE FOR s;
+------------------+
| NEXT VALUE FOR s |
+------------------+
|              100 |
+------------------+

SELECT PREVIOUS VALUE FOR s;
+----------------------+
| PREVIOUS VALUE FOR s |
+----------------------+
|                  100 |
+----------------------+

Now try to start the new connection and check that the last value is still
NULL, before updating the value in the new connection after the output of the
new connection gets current value (110 in the example below). Note that first
connection cannot see this change and the result of last value still remains
the same (100 in the example above).

$ .mysql -uroot test -e"SELECT PREVIOUS VALUE FOR s; SELECT NEXT VALUE FOR s;
SELECT PREVIOUS VALUE FOR s;"
+----------------------+
| PREVIOUS VALUE FOR s |
+----------------------+
|                 NULL |
+----------------------+
+------------------+
| NEXT VALUE FOR s |
+------------------+
|              110 |
+------------------+
+----------------------+
| PREVIOUS VALUE FOR s |
+----------------------+
|                  110 |
+----------------------+

URL: https://mariadb.com/kb/en/previous-value-for-sequence_name/