ADM_HIST_SQLSTAT

ADM_HIST_SQLSTAT displays information about statements executed on the current node. By default, only the system administrator can access this view. Common users can access the view only after being authorized. This view exists in the PG_CATALOG and SYS schemas.

After the WDR snapshot function is enabled (that is, the GUC parameter enable_wdr_snapshot is set to on), users can view the data in this view.

**Table 1** ADM_HIST_SQLSTAT columns
Name	Type	Description
instance_number	integer	Instance ID of a snapshot.
plan_hash_value	integer	ID of the normalized SQL statement.
module	integer	Name of the module that is executing when the SQL statement is first parsed.
apwait_delta	integer	Delta value of the application wait time.
sql_id	bigint	Query ID.
snap_id	bigint	Unique snapshot ID.
elapsed_time_delta	bigint	Valid DB time, which is accumulated if multiple threads are involved (unit: μs).
cpu_time_delta	bigint	CPU time (unit: μs).
executions_delta	bigint	Increment in the number of executions that have occurred on this object since it was brought into the cache.
iowait_delta	bigint	I/O time (unit: μs).
rows_processed_delta	bigint	Number of rows in the result set returned by the SELECT statement.
parsing_schema_name	character varying	Not supported. Its value is NULL.
disk_reads_delta	bigint	Not supported. Its value is NULL.
buffer_reads_delta	bigint	Not supported. Its value is NULL.
clwait_delta	bigint	Not supported. Its value is NULL.