DB2 Version 9.7 for Linux, UNIX, and Windows

SNAPSHOT_LOCK table function

Returns information from a lock snapshot.

Note: This table function has been deprecated and replaced by the SNAPLOCK administrative view and SNAP_GET_LOCK table function - Retrieve lock logical data group snapshot information.


>>-SNAPSHOT_LOCK--(--dbname--,--dbpartitionnum--)--------------><

The schema is SYSPROC.

Table function parameters

dbname: An input argument of type VARCHAR(255) that specifies a valid database name in the same instance as the currently connected database when calling this function. Specify a database name that has a directory entry type of either "Indirect" or "Home", as returned by the LIST DATABASE DIRECTORY command. Specify the null value to take the snapshot from the currently connected database.
dbpartitionnum: An input argument of type INTEGER that specifies a valid database partition number. Specify -1 for the current database partition, or -2 for all active database partitions. An active database partition is a partition where the database is available for connection and use by applications.
If the null value is specified, -1 is set implicitly.

If both parameters are set to NULL, the snapshot will be taken only if a file has not previously been created by the SNAPSHOT_FILEW stored procedure for the corresponding snapshot API request type.

Authorization

One of the following authorities is required to execute the function:

EXECUTE privilege on the function
DATAACCESS authority

To access snapshot monitor data, one of the following authorities is required:

SYSMON authority
SYSCTRL authority
SYSMAINT authority
SYSADM authority

The function returns a table as shown in the following section.

Table 1. Information returned by the SNAPSHOT_LOCK table function
Column name	Data type	Description or corresponding monitor element
SNAPSHOT_TIMESTAMP	TIMESTAMP	snapshot_timestamp - Snapshot timestamp
AGENT_ID	BIGINT	agent_id - Application handle (agent ID)
TABLE_FILE_ID	BIGINT	table_file_id - Table file identification
LOCK_OBJECT_TYPE	BIGINT	lock_object_type - Lock object type waited on
LOCK_MODE	BIGINT	lock_mode - Lock mode
LOCK_STATUS	BIGINT	lock_status - Lock status
LOCK_OBJECT_NAME	BIGINT	lock_object_name - Lock object name
PARTITION_NUMBER	SMALLINT	node_number - Node number
LOCK_ESCALATION	SMALLINT	lock_escalation - Lock escalation
TABLE_NAME	VARCHAR(128)	table_name - Table name
TABLE_SCHEMA	VARCHAR(128)	table_schema - Table schema name
TABLESPACE_NAME	VARCHAR(128)	tablespace_name - Table space name