System Catalogs Definitions - pg_stat_last_operation - 《Greenplum Database v6.23 Documentation》

The pg_stat_last_operation table contains metadata tracking information about database objects (tables, views, etc.).

column	type	references	description
`classid`	oid	pg_class.oid	OID of the system catalog containing the object.
`objid`	oid	any OID column	OID of the object within its system catalog.
`staactionname`	name		The action that was taken on the object.
`stasysid`	oid	pg_authid.oid	A foreign key to pg_authid.oid.
`stausename`	name		The name of the role that performed the operation on this object.
`stasubtype`	text		The type of object operated on or the subclass of operation performed.
`statime`	timestamp with timezone		The timestamp of the operation. This is the same timestamp that is written to the Greenplum Database server log files in case you need to look up more detailed information about the operation in the logs.

The pg_stat_last_operation table contains metadata tracking information about operations on database objects. This information includes the object id, DDL action, user, type of object, and operation timestamp. Greenplum Database updates this table when a database object is created, altered, truncated, vacuumed, analyzed, or partitioned, and when privileges are granted to an object.

If you want to track the operations performed on a specific object, use the objid value. Because the stasubtype value can identify either the type of object operated on or the subclass of operation performed, it is not a suitable parameter when querying the pg_stat_last_operation table.

The following example creates and replaces a view, and then shows how to use objid as a query parameter on the pg_stat_last_operation table.

testdb=# CREATE VIEW trial AS SELECT * FROM gp_segment_configuration;
CREATE VIEW
testdb=# CREATE OR REPLACE VIEW trial AS SELECT * FROM gp_segment_configuration;
CREATE VIEW
testdb=# SELECT * FROM pg_stat_last_operation WHERE objid='trial'::regclass::oid;
 classid | objid | staactionname | stasysid | stausename | stasubtype |            statime            
---------+-------+---------------+----------+------------+------------+-------------------------------
  1259  | 24735 | CREATE         |       10 | gpadmin    | VIEW       | 2020-04-07 16:44:28.808811+00
  1259  | 24735 | ALTER          |       10 | gpadmin    | SET        | 2020-04-07 16:44:38.110615+00
(2 rows)

Notice that the pg_stat_last_operation table entry for the view REPLACE operation specifies the ALTER action (staactionname) and the SET subtype (stasubtype).

Parent topic: System Catalogs Definitions