OPERATOR_EC_HISTORY_TABLE

OPERATOR_EC_HISTORY_TABLE records information about operators of Extension Connector jobs that have been executed. If enable_resource_record is set to on, the system imports records from GS_WLM_EC_OPERATOR_HISTORY to this system catalog every 3 minutes. This operation occupies storage space and affects performance. The current feature is a lab feature. Contact Huawei technical support before using it.

**Table 1** OPERATOR_EC_HISTORY_TABLE columns
Name	Type	Description
queryid	bigint	Internal query ID used for Extension Connector statement execution
plan_node_id	integer	Plan node ID of the execution plan of an Extension Connector operator
start_time	timestamp with time zone	Time when the Extension Connector operator starts to process the first data record
duration	bigint	Total execution time of the Extension Connector operator (unit: ms)
tuple_processed	bigint	Number of elements returned by the Extension Connector operator
min_peak_memory	integer	Minimum peak memory used by the Extension Connector operator on all DNs (unit: MB)
max_peak_memory	integer	Maximum peak memory used by the Extension Connector operator on all DNs (unit: MB)
average_peak_memory	integer	Average peak memory used by the Extension Connector operator on all DNs (unit: MB)
ec_status	text	Status of the Extension Connector job
ec_execute_datanode	text	Name of the DN executing the Extension Connector job
ec_dsn	text	DSN used by the Extension Connector job
ec_username	text	Username used by the Extension Connector job to access a remote cluster. This parameter is null if the remote cluster type is SPARK.
ec_query	text	Statement sent by the Extension Connector job to a remote cluster
ec_libodbc_type	text	Type of the unixODBC driver used by the Extension Connector job