sp_syscollector_delete_execution_log_tree (Transact-SQL)
Applies to: 
SQL Server
Deletes all the log entries for the run of a single collection set. It also deletes the log entries from the SSIS tables for that run.
Transact-SQL syntax conventions
Syntax
sp_syscollector_delete_execution_log_tree
[ @log_id = ] log_id
[ , [ @from_collection_set = ] from_collection_set ]
[ ; ]
Arguments
[ @log_id = ] log_id
The unique identifier for the collection set log. @log_id is bigint, with no default.
[ @from_collection_set = ] from_collection_set
The identifier for the collection set. @from_collection_set is bit, with a default of an empty string.
Return code values
0 (success) or 1 (failure).
Permissions
Requires membership in the dc_operator (with EXECUTE permission) fixed database role to execute this procedure.