Release Notes 4.1

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

The 4.1 release notes were released on 03/01/2023 and describe the following:

New Features

Newly Released Connector Drivers

JDBC 4.5.7 .jar file

Storage Version

The storage version presently in effect is version 45.

SQream Studio Updates and Improvements

SQream Studio v5.5.4 has been released.

Known Issues

Percentile is not supported for Window functions.

Version 4.1 resolved Issues

SQ No.



Function definition SQL UDF parenthesis issue


Slow catalog queries


Text column additional characters when using COPY TO statement


Encryption memory issues


JDBC supportsSchemasInDataManipulation() method issue

Configuration Changes

No configuration changes

Naming Changes

No naming changes

Deprecated Features

► Square Brackets []

The [], which are frequently used to delimit identifiers such as column names, table names, and other database objects, will soon be deprecated to facilitate the use of the ARRAY data type.

  • Support in [] for delimiting database object identifiers ends on June 1st, 2023.

  • To delimit database object identifiers, you will be able to use double quotes "".


The VARCHAR data type is deprecated to improve the core functionalities of the platform and to align with the constantly evolving ecosystem requirements.

  • Support in the VARCHAR data type ends at September 30th, 2023.

  • VARCHAR is no longer supported for new customers, effective from Version 2022.1.3.

  • The TEXT data type is replacing the VARCHAR and NVARCHAR data types.

End of Support

No End of Support changes were made.

Upgrading to v4.1

  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. Copy 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.