Note
For V4.4.1, this parameter is available starting with V4.4.1.
Description
default_micro_block_format_version specifies the default microblock storage format version number when a table is created.
Privilege requirements
Query the parameter
The
systenant and all user tenants can use theSHOW PARAMETERSstatement to query this parameter.Modify the parameter
The
systenant and all user tenants can use theALTER SYSTEM SETstatement to modify this parameter.
Attributes
| Attribute | Description |
|---|---|
| Type | Int |
| Default value | 2 |
| Value range | [1,+∞)
|
| Modifiable | Yes. You can use the ALTER SYSTEM SET statement to modify the parameter. |
| Effective upon OBServer node restart | No. The setting takes effect immediately. |
Considerations
You can modify this parameter to adjust the default microblock storage format version number for tables, thereby controlling whether to enable the new Flat row storage format.
Examples
A user tenant executes the following command to set the microblock storage format version number 2 as the default value for microblock storage format for tables created after this operation:
obclient> ALTER SYSTEM SET default_micro_block_format_version = 2;