Release Notes 4.0

SQream is introducing a new version release system that follows the more commonly used Major.Minor versioning schema. The newly released 4.0 version is a minor version upgrade and does not require considerable preparation.

The 4.0 release notes were released on 01/25/2023 and describe the following:

New Features

Storage Version

The storage version presently in effect is version 45.

SQream Studio Updates and Improvements

  • When creating a New Role, you may now create a group role by selecting Set as a group role.

  • When editing an Existing Role, you are no longer obligated to update the role’s password.

Known Issues

Percentile is not supported for Window functions.

Version 4.0 resolved Issues

SQ No.



SQream Studio dashboard periodic update enhancement


Slow catalog queries


Slow query performance when using JOIN clause


JDBC insertBuffer parameter issue


GET DDL foreign table output issue


SQream Studio group role modification issue


Internal compiler error


Server Picker GPU dependency


Executing SELECT on a foreign table with no valid path produces no error message


SQream Studio result panel adjustment


NULL issue when executing query with pysqream

Configuration Changes

No configuration changes were made.

Naming Changes

No relevant naming changes were made.

Deprecated Features

SQream is declaring end of support of VARCHAR data type, the decision resulted by SQream’s effort to enhance its core functionalities and with respect to ever changing echo system requirements.

VARCHAR is no longer supported for new customers - effective from Version 2022.1.3 (September 2022).

TEXT data type is replacing VARCHAR and NVARCHAR - SQream will maintain VARCHAR data type support until 09/30/2023.

End of Support

No End of Support changes were made.

Upgrading to version 4.0

  1. Generate a back-up of the metadata by running the following command:

    $ select backup_metadata('out_path');


    SQream recommends storing the generated back-up locally in case needed.

    SQream runs the Garbage Collector and creates a clean backup tarball package.

  2. Shut down all SQream services.

  3. Extract the recently created back-up file.

  4. Replace your current metadata with the metadata you stored in the back-up file.

  5. Navigate to the new SQream package bin folder.

  6. Run the following command:

    $ ./upgrade_storage <levelDB path>


Upgrading from a major version to another major version requires you to follow the Upgrade Storage step. This is described in Step 7 of the Upgrading SQream Version procedure.