ob_enable_index_direct_select

Description

The ob_enable_index_direct_select variable specifies whether to allow users to directly query index tables.

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 obtain 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 obtain 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

Examples

Set the value of the ob_enable_index_direct_select variable to 0 to disallow users from directly querying index tables.

• Session level

  obclient> SET ob_enable_index_direct_select =0;
  

• Global level

  obclient> SET GLOBAL ob_enable_index_direct_select =0;