SYSTEMS AND METHODS OF OPERATION LOCK MANAGEMENT AND SYSTEM CATALOG OVERRIDES IN DATABASE SYSTEMS

摘要

Systems and methods are provided for a shared memory between a database system and a storage catalog server, which stores system catalog overrides and locks for at least a first workflow. The current system catalog overrides include at least a portion of the system catalog overrides and locks that are retrieved by the shared memory from the storage catalog server at a predetermined point in time. The database system performs a check of at least one of index validity and tenant validity for a second workflow or other database operation by checking a state of the corresponding tenant or index in the current system catalog overrides. The system catalog overrides suppress visibility of the respective system catalog changes when the database system determines that at least one of the index and the tenant is invalid based on the current system catalog overrides for the first workflow.