Note
This variable is available starting with OceanBase Database V1.4.
Description
ob_capability_flag specifies the capabilities provided by the OBServer node. It is used for capability negotiation with obproxy to inform 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 by executing an SQL statement after the tenant is created. |
| Visibility | No. All tenants cannot see this variable. |
Considerations
You cannot query the value of this variable by executing the SHOW VARIABLES statement or querying the SYS.TENANT_VIRTUAL_SESSION_VARIABLE view (Oracle mode) or the information_schema.SESSION_VARIABLES view (MySQL mode). You can query the value of this variable by querying the SYS.DBA_OB_SYS_VARIABLES view (Oracle mode) or the oceanbase.DBA_OB_SYS_VARIABLES view (MySQL mode).