query_rewrite_integrity

Description

query_rewrite_integrity specifies the data consistency check level for query rewriting of materialized views.

Privilege requirements

• Query variables

  • Global level

    sys tenants and all user tenants can execute the SHOW VARIABLES statement or query the SYS.TENANT_VIRTUAL_GLOBAL_VARIABLE view (Oracle mode) or the information_schema.GLOBAL_VARIABLES view (MySQL mode) to view the values of global system variables.

  • Session level

    sys tenants and all user tenants can execute the SHOW VARIABLES statement or query the SYS.TENANT_VIRTUAL_SESSION_VARIABLE view (Oracle mode) or the information_schema.SESSION_VARIABLES view (MySQL mode) to view the values of session system variables.

• Modify variables

  • Global level

    • sys tenants can directly modify the values of global system variables.

    • MySQL user tenants must have the SUPER or ALTER SYSTEM privilege to modify the values of global system variables.

    • Oracle user tenants must have the ALTER SYSTEM privilege to modify the values of global system variables.

  • Session level

    sys tenants and all user tenants can directly modify the values of session system variables.

Attributes

Usage

This variable is meaningful only when the value of the query_rewrite_enabled variable is not false.

Examples

Set the query rewrite integrity level to enforced.

• Session level

  obclient> SET  query_rewrite_integrity= enforced;
  

• Global level

  obclient> SET GLOBAL  query_rewrite_integrity= enforced;
  

References

Overview of materialized views