Apply for trial use of new features - MaxCompute - Alibaba Cloud Documentation Center

This topic describes the new features of MaxCompute that are in trial use. This topic also describes the details about the new features and how to apply for trial use of new features.

Precautions

After you start the trial use of a feature, you cannot cancel the trial use. Apply for trial use based on your business requirements.

Procedure

Access an application for trial use and fill in the application.
Note
You can log on to the MaxCompute console and obtain the name of the MaxCompute project on the Projects page.
Submit the application and wait for the approval result.
After you submit the application, MaxCompute product engineers review your application at the earliest opportunity. In most cases, the review period is three business days. You are notified of the approval result by text message. After your application is approved, you can use the new feature for a trial. If you have any questions about the approval result, click the link or join the DingTalk Group (ID: 11782920) of the MaxCompute developer community to contact MaxCompute technical support.

New features

The following table describes the new features that you can apply for trial use. For more information, see Announcement.

Date	Feature	Description
March 2023	Support for volume-related permissions on projects	An external volume is a distributed file system and related data storage solution provided by MaxCompute. An external volume is a MaxCompute object that is mapped to an OSS directory. You can create an external volume in MaxCompute and mount it to a directory or bucket in OSS. Then, you can use the MaxCompute permission management system to control user access to external volumes in a fine-grained manner. You can also use the MaxCompute engine to process data of files in external volumes and complete integrated computing of data lakehouses. For more information, see External volume operations.
November 2022	Project object storage by schema	MaxCompute supports the schema feature. This feature allows you to classify objects such as tables, resources, and user-defined functions (UDFs) in a project. You can create multiple schemas in a project. For more information, see Schema-related operations.
November 2022	Tenant-level schema syntax	The odps.namespace.schema parameter specifies whether to enable or disable the schema syntax. If you use the schema feature, SQL statements must identify the semantics of `project.schema.table`. Therefore, you must configure the odps.namespace.schema parameter to determine the SQL semantics. You can configure this parameter at the tenant level or at the job level. To use the schema feature, you must run the `set odps.namespace.schema=true;` command to enable the schema syntax. The schema syntax identifies information in the `a.b.c` format in SQL statements as `project.schema.table` and identifies information in the `a.b` format in SQL statements as `schema.table`. You can run the `set odps.namespace.schema=false;` command to disable the schema syntax. This way, information in the `a.b.c` format in SQL statements cannot be identified, and information in the `a.b` format in SQL statements is identified as `project.table`. For more information, see Schema-related operations.
November 2022	Tenant-level metadata service Information Schema	The Information Schema service of MaxCompute provides information such as project metadata and historical usage data. Tenant-level Information Schema is developed based on the original Information Schema. Tenant-level Information Schema allows you to query the metadata and historical usage data of your projects.