Note
This variable is available starting with V1.4.
Description
ob_capability_flag specifies the capabilities provided by an OBServer node. This variable 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 a tenant is created. After a tenant is created, you cannot modify its value by executing an SQL statement. |
| Visibility | No. All tenants cannot view this variable. |
Usage
You cannot query the value of this variable by executing the SHOW VARIABLES statement or querying the SYS.TENANT_VIRTUAL_SESSION_VARIABLE view (Oracle-compatible mode) and the information_schema.SESSION_VARIABLES view (MySQL-compatible mode). You can query the value of this variable from the SYS.DBA_OB_SYS_VARIABLES view (Oracle-compatible mode) or the oceanbase.DBA_OB_SYS_VARIABLES view (MySQL-compatible mode).