GET_AHM_EPOCH

Returns the number of the in which the is located.

Returns the number of the epoch in which the Ancient History Mark is located. Data deleted up to and including the AHM epoch can be purged from physical storage.

This is a meta-function. You must call meta-functions in a top-level SELECT statement.

Behavior type

Volatile

Syntax

GET_AHM_EPOCH()

Note

The AHM epoch is 0 (zero) by default (purge is disabled).

Privileges

None

Examples

=> SELECT GET_AHM_EPOCH();
    GET_AHM_EPOCH
----------------------
 Current AHM epoch: 0
(1 row)