Note
This variable is available starting with V1.4.
Description
ob_capability_flag specifies the capabilities provided by the OBServer node. It is used to negotiate capabilities with obproxy, informing obproxy of the supported and unsupported features of the current OBServer node.
Attributes
Attribute |
Description |
|---|---|
| Type | Uint |
| Default value | 0 |
| Value range | [0,18446744073709551615] |
| Scope | Session |
| Modifiable | No. This variable can be specified when creating a tenant, but cannot be modified through SQL statements after the tenant is created. |
| Visibility | No. All tenants cannot see this variable. |
Usage
Users cannot query the value of this variable using the SHOW VARIABLES statement or the SYS.TENANT_VIRTUAL_SESSION_VARIABLE view (Oracle mode) and the information_schema.SESSION_VARIABLES view (MySQL mode). Users can query the value of this variable using the SYS.DBA_OB_SYS_VARIABLES view (Oracle mode) and the oceanbase.DBA_OB_SYS_VARIABLES view (MySQL mode).