Lock and unlock the optimizer stats of Schema, table and Partition

Lock and unlock the stats of Schema

-- lock the schema stats
EXEC DBMS_STATS.LOCK_SCHEMA_STATS('schema_name');

--unlock the schema stats
EXEC DBMS_STATS.UNLOCK_SCHEMA_STATS('schema_name');


Lock and unlock the stats of table

--Check Stats is locked for table (if ALL is return then its locked otherwise NULL)
SELECT stattype_locked FROM dba_tab_statistics WHERE table_name = 'TEST' and owner = 'HR';
STATT
—–
ALL

--Unlock the stats for the table
exec dbms_stats.unlock_table_stats('schema_name', 'table_name');


Lock and unlock the stats of Table Partition

-- Lock the Partition Stats
exec dbms_stats.lock_partition_stats('Schema_name','table_name','partition_name');

--unlock the partition stats
exec dbms_stats.lock_partition_stats('Schema_name','table_name','partition_name');