Version: current [26.x]

25.x Release Notes

note

Releases are listed in reverse order, starting with the latest release of Dremio 25.x.

25.2.17 (August 2025) Enterprise

Improvements and Issues Fixed

General Updates

Fixed an issue with the JDBC driver, where queries returned incorrect values for column type precision and scale.
DX-106400
Fixed an issue with the JDBC driver, where queries with zero rows with null columns failed with a NullPointerException.
DX-104076

25.2.16 (July 2025) Enterprise

Improvements and Issues Fixed

General Updates

Fixed an issue in IcebergDeleteFileAggTableFunction that caused equalityId's to be null, resulting in failures when tables included both position and equality deletes. The function now correctly handles mixed delete file types.
DX-106012
Fixed a rare issue where a connection closes due to network flakiness in the middle of a query execution, and if the close connection event comes after the open connection event on a given executor, the executing query can become blocked (until the executor restarts) instead of raising an error due to the connection failure. Queries will now fail with the correct error message instead of becoming blocked.
DX-105091
Fixed an issue where, after restoring a backup, new backups would fail with a checksum error.
DX-102352
The results cache is now turned off by default.
DX-103702
Fixed memory buffer and decimal scale issues between MongoRecordReader and BsonReader that were causing validation errors and infinite loops.
DX-102712
Fixed an issue when a query could not be cancelled under heavy cluster load when the housekeeping thread responsible for handling read task timeouts became unresponsive due to thread starvation.
DX-105512
Fixed an issue where queries would fail with the error Unable to coerce from the file's data type "null" to the column's data type when reading MongoDB collections if schema discovery was disabled and fields containing empty arrays were found.
DX-105466
Fixed a race condition between spilling during memory pressure and writing a Parquet file, which led to an IndexOutOfBoundsException.
DX-101016
Fixed a NullPointerException (NPE) encountered in reading Delta Lake tables without column mappings that had undergone schema evolution. The NPE occurred when selecting an array column's element using an index. For example, [0] or alike.
DX-105935
Fixed a NullPointerException that could occur when querying a table in AWS Glue Data Catalog with an empty SerDeInfo field.
DX-106113
Added schema filtering to Amazon Redshift to reduce unnecessary metadata queries and improve performance due to Redshift connection limitations.
DX-99422
Improved the Dremio engine to handle a large number of expressions efficiently.
DX-34931

APP

Improved the responsiveness of the query cancellation, even in cases of queries with a large number of expressions.
DX-105803
Fixed an issue that caused the Dremio console to become unresponsive.
DX-104748
Fixed the tooltips shown when hovering over errors in the SQL editor to have a similar appearance to other tooltips in the Dremio console.
DX-58337

25.2.15 (June 2025) Enterprise

Improvements and Issues Fixed

General Updates

Fixed an issue for scripts created through the Dremio API so that they don't have their content overwritten when opened in the SQL editor.
DX-104226

APP

Fixed an issue where the query duration timer would continue ticking after a query was completed.
DX-105185
Fixed an issue where users couldn't use the sidebar navigation when on the old version of the Job Overview page.
DX-101394

SQL

Added a DRY RUN mode to VACUUM CATALOG, which will be able to identify the files to be deleted without taking any action.
DX-105120
Fixed an issue that dramatically slowed down Data Manipulation Language (DML) queries that contained both a target and source table.
DX-105365
Fixed issue when casting a DECIMAL from VARCHAR where, in some cases, caused a SIGSEGV error if the value was not a number.
DX-97570

25.2.14 (June 2025) Enterprise

Improvements and Issues Fixed

General Updates

Reduced the frequency of status checks for certain source types.
DX-105266
Timeout for source health checks is now configurable.
DX-102156
Fixed a rare issue with Iceberg Data Manipulation Language (DML) queries writing null results on some rows that shouldn't, which happened with DML statements that contained a target and source table. This issue occurred on either Merge on Read (MoR) or Copy on Write (CoW) DMLs configurations.
DX-105013
Removed the NOLOCK statement from the query responsible for loading tables so external tables can be shown in Azure Synapse sources.
DX-104652
Fixed issues related to the READ METADATA privilege so that it follows the correct privilege inheritance chain as documented in Privileges.
DX-104406
Fixed an issue where queries were not being canceled after a coordinator restart, causing them to remain stuck.
DX-104173
Fixed an issue where Dremio incorrectly applied equality deletes on Iceberg tables, which caused incomplete results to be returned.
DX-104150
Fixed an issue with metadata refresh when promoting a table with Ignore other file formats enabled in Formatting a File or Folder as a Table.
DX-103973
Added the delete-source command to the dremio-admin CLI to delete a source.
DX-102752
Reduced unnecessary computation by tuning the target file sizes for the internal OPTIMIZE jobs that run against Reflections.
DX-102747
Fixed a pivoted buffer overrun with a join query that caused the Dremio daemon process to abort.
DX-101154
Reduced the coordinator heap usage for planning queries with Reflections anchored on complex views.
DX-98021
Fixed an issue with a refresh query failing with "Query was cancelled because it exceeded the memory limits set by the administrator."
DX-97947

APP

Fixed an issue with the execution of multiple queries when the sqlrunner.tabs_ui setting was disabled, which caused only the first query to be executed, and the subsequent queries were not executed.
DX-104388
Prevented saving views with duplicate column names (for example, SELECT 1 AS col, 2 AS col) with a validation error to ensure that views will not fail when used in downstream queries (for example, SELECT * FROM <view>).
DX-100977
Improved the error message to be clear when there is a cycle in a view.
DX-89182

SQL

Fixed an issue that caused certain queries to fail when the HASH_JOIN operator spilled to disk and triggered an IndexOutOfBoundsException.
DX-104899
Fixed user-defined functions with a null full path to have a valid full path.
DX-104745

25.2.12 (May 2025) Enterprise

Improvements and Issues Fixed

General Updates

Fixed a memory leak on the coordinator when queries using Arrow Flight are canceled.
DX-102833

25.2.11 (May 2025) Enterprise

Improvements and Issues Fixed

General Updates

Fixed an issue where duplicate upstream refreshes could happen when refreshing a Reflection that scans the upstream table multiple times.
DX-102260
Fixed an issue where Reflections based on views containing deeply nested expressions might not be able to be used even if the refresh job succeeded.
DX-93284
Fixed an issue where some Reflections were not accelerating SQL client queries but were accelerating Dremio UI queries.
DX-97572
Fixed an array index out-of-bound issue with query planning for views that do not project ORDER BY columns.
DX-99095
Previously, users couldn't create a new tab because they had hidden/orphaned up to 1000 scripts. Users should now be able to add tabs as expected and not have hidden/orphaned unsaved scripts.
DX-103534
Fixed an issue that caused the execution of a script to fail with the "No queries found" error when the user has the VIEW privilege.
DX-102553
Fixed the issue where large case expressions were causing the planner to hang.
DX-101299

SQL

Fixed an issue with REFRESH METADATA FOR PARTITIONS for transactional Hive tables.
DX-102376
Fixed an issue where queries against tables with equality deletes could fail if the fields used in the deletes had capital letters.
DX-103866
Fixed an issue where a query containing ORDER BY ... LIMIT ... failed when using more than 500 million in the LIMIT clause.
DX-103907
Fixed an issue where tables with the same name in different folders would throw an error when added to the include / exclude list for VACUUM CATALOG queries.
DX-103559
Fixed an issue related to CREATE TABLE AS SELECT statements for Parquet datasets with the error message "Multiple entries with same key: $file=$file: Utf8 and $file=$file: Utf8".
DX-104033

25.2.10 (May 2025) Enterprise

Improvements and Issues Fixed

General Updates

Resolved an issue with row count estimates in Delta Lake tables that could lead to suboptimal query plans.
DX-103030
Fixed a NullPointerException (NPE) with handling of unset engine name field that can sometimes leave jobs in a non-terminal state after a coordinator restart.
DX-101519
Fixed an IllegalStateException for certain queries with rollup aggregations.
DX-101395
Fixed an issue where an OversizedAllocationException could occur for collections of variable-length values due to unnecessary data buffer reallocations.
DX-103035
Removed a schema parameter from the Snowflake source definition.
DX-100555
Fixed time travel on Unity and Snowflake Catalogs by resolving timestamp-based requests via updated snapshot provider logic.
DX-98200
Fixed an issue that could cause Gandiva-related crashes due to stack space corruption.
DX-90468

SQL

Fixed an issue that could cause a NPE when querying INFORMATION_SCHEMA.SCHEMATA.
DX-103489
Fixed an issue in the VACUUM CATALOG SQL command where live manifest files with the s3a scheme were incorrectly deleted.
DX-103051
Fixed an issue where adding more than one item to the EXCLUDE list, without specifying the reference, for the VACUUM CATALOG SQL command would show a syntax error in the Dremio console.
DX-102938
Added an option to whitelist tables for the VACUUM CATALOG SQL command using the INCLUDE option.
DX-102711

25.2.9 (April 2025) Enterprise

Improvements and Issues Fixed

SQL

Resolved an issue when using LEAD or LAG SQL functions with an OFFSET parameter (offset 1 as well as offset 2+) that could cause incorrect results.
DX-102591

25.2.8 (April 2025) Enterprise

Improvements and Issues Fixed

General Updates

"Failed to open file" error messages for Iceberg now reference an input file by the file path's location instead of the object ID.
DX-102345
Fixed an issue that could occur during the execution of very large queries, where Dremio log files would grow rapidly and eventually lead to "disk full" situations.
DX-102345
Join keys over 128 KB are now handled correctly.
DX-99636
Fixed an issue where a query could fail with a NoSuchElementException error.
DX-101821
Improved error message handling for missing manifest files when reading Iceberg tables.
DX-92081
CVE-2025-30065 has been fixed by backporting the related fix from the Apache parquet-java project to Dremio's internal fork and using this latest build in the Dremio release.
DX-102461

APP

Fixed an issue in which the Save as option for views returned an error when the dataset version history for the view had been corrupted.
DX-101506

SQL

Improved support for displaying query results containing ARRAY<MAP<string,string>> complex types in the Dremio console. Rewrote the View.getField to correctly handle nested types, ensuring accurate representation of complex schemas.
DX-92117

25.2.7 (April 2025) Enterprise

Improvements and Issues Fixed

General Updates

Fixed a sporadic issue where a Reflection was not used immediately after refresh. Improved performance of Reflection management so that materializations are available for use sooner. Added additional Reflection debug logging for support.
DX-97572
Fixed a defect where we could get wrong data in a Reflection when an extremely large amount of data files are present.
DX-101552
Reduced the jobs metadata size by no longer persisting the Reflection matching plans into REFRESH REFLECTION jobs.
DX-98022
Queries now scan only the required fields from complex structure type columns to prevent errors in query execution.
DX-93643
Updated the Dremio HTTP endpoints to respond with a 405 Method Not Allowed error when handling unexpected HTTP methods. While these methods are typically reserved for internal debugging and diagnostics, this change helps strengthen security by preventing potential misuse by those attempting to exploit the web server.
DX-97052

APP

Fixed an issue in which loading the Catalog Usage tab on the Monitoring page could lead to high heap memory usage and potentially cause the coordinator to restart.
DX-101919

SQL

Addressed an issue where the NESTED_LOOP_JOIN operator produced incorrect results in certain cases when used with a HASH_JOIN or a PROJECT operator containing a computed column.
DX-97524
Fixed an issue where the LEAD() function returned incorrect values for the last row in a partition, where NULL was expected.
DX-102071

25.2.6 (March 2025)

Improvements and Issues Fixed

General Updates

Reduced noise in the logs generated when reading data from Parquet files by changing the log level of certain messages from WARNING to DEBUG.
DX-101258
Changed automated backup not to reuse a backup destination folder. On every backup, a new folder with the pattern <distStore>/backups/dremio_backup_<timestamp>-<dremio_version> is now created.
DX-95898

SQL

Fixed an issue that could cause a CompileException error when using a large number of columns in a ORDER BY clause.
DX-99689

25.2.5 (March 2025)

What's New

APP

Added a new Rerun query on download option to the Preferences page in the Dremio console. When enabled, Dremio reruns the query before downloading the results.
DX-101308

Improvements and Issues Fixed

General Updates

Re-added a compatibility layer for older indices.
DX-101257

SQL

Fixed a bug where queries using ROW types may fail with the error "DremioSqlValidator is a dummy SqlValidator to adapt to upstream API changes".
DX-100331

25.2.4 (March 2025)

Improvements and Issues Fixed

General Updates

Fixed an issue where query phase timeouts would not impact Reflection matching.
DX-98080
Fixed an issue that could cause an "Unable to find the reference field" error during query planning due to Common Subexpression Elimination (CSE).
DX-90660
Adjusted metadata collection methods to reduce the load of queries to a MongoDB instance.
DX-85654
Fixed an issue that could cause higher resource utilization on the coordinators due to the incorrect scheduling of a background task that deletes old jobs.
DX-95235
Fixed an issue that could occur when a routing rule with a query_label() condition would not work as expected for queries triggered using Arrow Flight client applications.
DX-99808
Fixed an issue where merge-on-read DML operations could fail on Apache Iceberg tables with partition transforms.
DX-99569
Fixed an issue where high setup times could be seen when running queries against Iceberg tables.
DX-100856
Fixed an issue where the snapshot ID for a table could stop refreshing and cause a Reflection to continuously refresh.
DX-99311
Fixed an issue where queries utilizing Reflections could fail or reference stale materializations.
DX-100896
Removed a batch label from the coordinator.userRpc.time metric to reduce the cardinality of buckets being created and prevent overloading of the metrics database.
DX-96739
Updated the following libraries to address potential security issues:
- AsyncHttpClient to 3.0.1 [CVE-2024-53990]
  DX-98578
- Elasticsearch client library to 8.14.2 and removed support for Elasticsearch clusters of old versions before 7
  DX-100797
Updated the Snowflake driver to 3.19.0 to resolve SNOW-928973.
DX-92315

SQL

Resolved an issue with job state inconsistencies where CTAS jobs remained stuck in a running state and could not be canceled properly.
DX-96997
Fixed an issue that could cause VACCUM CATALOG to use synchronous readers for metadata JSON files, which might cause memory leak issues. Now VACUUM CATALOG uses asynchronous readers instead.
DX-98605
Fixed a nested user-defined function issue where a UDF was unable to call other UDFs.
DX-95612
Fixed an issue where a schema error could be thrown if a user ran an INSERT SQL command with a subset of the columns in an Iceberg table.
DX-92442
Fixed the PARSE_URL SQL function to handle URLs longer than 256 characters.
DX-100691
Fixed an issue that could occur with class compilation when using a literal value in a window function.
DX-100466
Resolved an issue for SELECT queries when using the LAG SQL function with an OFFSET parameter that could cause incorrect results.
DX-99536
Fixed a stack overflow issue with queries containing a long list of constants in a WHERE IN clause.
DX-98414

25.2.3 (January 2025)

Improvements and Issues Fixed

General Updates

Better handling of personal access tokens for deactivated users on an identity provider.
DX-96754
Fixed an issue that could prevent the retry policy for Reflection refreshes from working in all cases.
DX-99314
Updated the following libraries to address potential security issues:
- Aircompressor from 0.10 to 0.27 [CVE-2024-36114]
  DX-96853
- Apache Avro library [CVE-2024-47561]
  DX-99132
Fixed a memory leak issue during table scans that could lead to a query abort.
DX-98634

SQL

Fixed an issue that could cause a query with a LIMIT clause to not be accelerated due to miscalculated row adjustments.
DX-96246
Fixed an issue that could cause VACCUM CATALOG to use synchronous readers for metadata JSON files, which might cause memory leak issues. Now VACUUM CATALOG uses asynchronous readers instead.
DX-98605

25.2.2 (December 2024)

Improvements and Issues Fixed

General Updates

Fixed an issue with a permanent query slot loss in multi-coordinator setups that could gradually lose query concurrency slots on Workload Management (WLM) queues at very high loads when a client application pushes more queries to a particular WLM queue than the configured concurrency, causing the client application to time out and close its connection. Before the fix, restarting the coordinators was the only way to fix this issue.
DX-98355
Fixed an issue that could cause garbage collection logs to not be accessible.
DX-98240
Enabled Reflections for cases when there is an equivalent row and column access control (RCAC) filter on all children of a view that is the union of two or more datasets.
DX-95563
Fixed an issue that could cause a REFRESH REFLECTION job to not pull new data for an external query, causing stale data to be returned when using the Reflection.
DX-98107
Fixed an issue where Reflection REFRESH jobs could fail for Reflections involving joins in the query plan if field-based incremental refresh was configured on the underlying datasets. These Reflection refreshes will now succeed using full refreshes.
DX-97085
Fixed an issue that could cause reading tables from the AWS Glue Data Catalog to be slow.
DX-96290
Disabled all TRACE web requests, which now return 405(NOT_ALLOWED) error codes.
DX-97052

API

Fixed an issue that could prevent admin users from updating a script owner's privileges via the Scripts API.
DX-97879

APP

Fixed an issue that could cause the SQL Runner to display the view definition of the last executed preview instead of the saved view definition.
DX-96707

SQL

You can now exclude specific tables directly in the catalog source when running the VACUUM CATALOG SQL command.
DX-96734
Fixed a NullPointerException (NPE) when querying the same table using different quoted identifiers.
DX-98253
Fixed an issue that could cause ALTER TABLE to fail with a "Schema change detected" error when using the SQL command to drop and re-add a column with an incompatible type. Reporting has also improved for any instance where data cannot be coerced to the user-defined column type.
DX-87232
Fixed an issue that could return a null value for a SELECT query on a column when schema learning is disabled and the column type is incompatible with the column values. When the table schema is inconsistent with the data, an error will now be reported to recommend that you enable schema learning so Dremio can properly manage the schema based on the data.
DX-88577
LIMIT and OFFSET cannot exceed the maximum integer value. The query is gracefully blocked if the sum (or individual values) of LIMIT and OFFSET exceeds maximum value for a signed integer.
DX-97963, DX-18632
Updated the VACUUM CATALOG SQL command to allow table exclusion.
DX-97940
Fixed an issue in some cases that could prevent runtime filtering if the CONVERT_FROM SQL function was used in the query.
DX-93179
Added a new SQL function TRY_CONVERT_FROM to support converting a JSON to a user-specified type. NULL is returned when the JSON cannot be converted.
DX-94338
Fixed an issue in some cases where filters on the date column with COALESCE were preventing the partition filter from being pushed down.
DX-97665
Fixed an issue that could cause an OutOfMemoryException(OOM) to be ignored in a HASH_JOIN operator, which is now explicitly thrown to prevent unexpected behavior with the HASH_JOIN.
DX-94029
Removed unsupported pushdown operations with VARCHAR data types from PostgreSQL advanced relational pushdown (ARP) connectors.
DX-98093
Fixed an issue where certain filters were not pushed down to table scans for Unity Catalog and Polaris (Preview) Catalog sources.
DX-98653

25.2.1 (November 2024)

Improvements and Issues Fixed

General Updates

Older user-defined functions may store a null full path, which could cause a NullPointerException (NPE). We've mitigated the issue by preventing the NPE and logging a warning.
DX-97341
Updated the following library to address potential security issues:
- Avro from 1.11.3 to 1.11.4 within Dremio's packaged version of Hive [CVE-2024-47561]
  DX-96442
Improved query performance for queries creating self joins with row policies by adding an option to disable value generation during query decorrelation.
DX-97370
Improved filter pushdown phase timing for queries with too many union clauses.
DX-96563
Added the ability to set the Azure Client ID that Dremio should use for Azure Key Vault requests to disambiguate between multiple Azure user-assigned managed identities on Azure VMs or AKS deployments.
DX-94967
Fixed an issue where a duplicated table schema could be written to its metadata file.
DX-97502

APP

Changed dataset owners now correctly appear in the Details panel.
DX-97037
Fixed an issue that could cause the Appearance tab not to appear on the Account Settings page.
DX-97330
Fixed an issue that could prevent users from being able to run or preview a query in the SQL Runner after viewing the History tab for the query on the Datasets page.
DX-96139
Navigating to the wiki of a dataset from the SQL Runner will no longer cause (edited) to appear next to the dataset name.
DX-96470

SQL

Fixed an issue with the ASCII function that could return an incorrect sign for values greater than 127 on Graviton.
DX-90311
You can now use columns with a VARCHAR data type in a SELECT subquery of a SELECT statement.
DX-83189
Fixed a rare issue where decorrelating a subquery with an EXISTS statement and an empty GROUP BY clause could result in incorrect data.
DX-96652, DX-96946
Fixed an issue where CLUSTER and CLUSTERING were accidentally added as reserved keywords. They are no longer treated as reserved.
DX-97918

25.2.0 (October 2024)

What's New

Dremio can connect to Databricks Unity Catalog service as a source and read Delta Lake Universal Format (UniForm) tables. Unity Catalog is a unified and open governance solution for data and AI that provides centralized access control, auditing, lineage, and data discovery capabilities across workspaces.
DX-92614
Dremio can connect to Snowflake's Polaris Catalog service as a source for Apache Iceberg tables. Polaris Catalog is built on top of open community-run standards and integrates seamlessly with Apache Iceberg to enhance metadata management, cataloging, and governance.
DX-93402
You can now connect to Vertica as a source in Dremio. Designed for scalability and efficiency, Vertica is a database that delivers unified analytics while enabling lower costs and minimizing server requirements.
DX-45154

Dark Mode is now available in Dremio! You can now choose between light mode, dark mode, or system settings. Try it out by going to Account Settings > Appearance.
DX-93591
Managed access spaces centralize the administration of access privileges in shared spaces to a limited sets of users and roles, including the space owner. By limiting privilege grant authority, managed access spaces help ensure consistent and controlled access policies and reduce the risk of unauthorized access.
DX-91614

Improvements and Issues Fixed

General Updates

Fixed an issue where queries could be stuck in planning and accumulate until a coordinator restart is required.
DX-94146
Added an option to specify a list of allowed namespaces in Iceberg REST based sources. Whether or not to include the whole subtree of namespaces under such a specified namespace can be toggled with a checkbox on the Source Settings page. Namespace separator regex sequence can be adjusted by the plugins.restcatalog.allowed.ns.separator support option (by default it's a dot character).
DX-91768, DX-93527
Reduced coordinator memory footprint due to interim query telemetry updates, thereby improving reliability. There will be a slight increase (~2MB per query) in transient disk space as these interim updates are now stored on disk. This additional storage space will be freed once the query finishes.
DX-90141
Fixed an issue that could prevent async Azure reads due to a time zone issue in locations east from Greenwich Mean Time (GMT).
DX-93739
Reduced internal page size to minimize heap pressure while handling multiple jobs for system table requests parallelly.
DX-96686
Fixed an issue that could prevent users from seeing files that were deeply nested because their access was denied.
DX-96147
Updated the following libraries to address potential security issues: Ranger client in Dremio was upgraded from version 1.1 to 1.2.
DX-93529
Fixed an issue with Helm charts that could cause partial logging to be created when setting writeLogsToFile to true.
DX-96480
Resolved an inconsistency with environment variables in Helm charts.
DX-96410
Incompatible runtime filters are now ignored so as to avoid an UnsupportedOperationException while setting up Parquet readers.
DX-90910

APP

Added a Software License and Service Agreement page as part of the Dremio login process.
DX-93796
You can now open the Details Panel from the options menu on the Datasets page.
DX-94365
On the Datasets page, using Group By to measure Variance now works as expected to generate SQL.
DX-43387
Dremio will now notify you when a view's metadata is out-of-date due to schema changes in the underlying views or tables. The notification will appear on the Data panel in the SQL Runner and in the Details and Lineage tabs on the Datasets page.
DX-90209
Creating a new tab while a script is executing will now cause a confirmation dialog to appear in the SQL Runner.
DX-95364
Fixed an issue that prevented non-admin users from saving a view when using the Save as View button in the SQL Runner.
DX-96278
Fixed an issue that could cause query results to appear in a new tab when cached results are loading in the SQL Runner.
DX-95354
The Visual Profile tab on the Jobs page will now show the correct error message when a visual profile cannot be generated.
DX-94991, DX-95237
Fixed an issue where certain jobs with a Reflection do not have a creation time present.
DX-96664
When hovering over the tooltip for a Reflection score on the Reflections page, the daily query accelerated value will be rounded to the nearest integer.
DX-94803

SQL

Fixed an issue that could occur when complex types are returned when splitting a function such as ARRAY_COMPACT.
DX-94387
Fixed an issue with the ASCII function that could return an incorrect sign for values greater than 127 on Graviton.
DX-90311
Added null handling logic for SUBSTRING and REGEXP_LIKE functions. If one of the arguments is NULL, the function will return NULL.
DX-94388
Fixed an issue where IN queries with NULL could lead to a type mismatch exception.
DX-84660
Fixed a NullPointerException (NPE) that could cause VACUUM jobs for Reflections to fail.
DX-96262
A new vacuum log file will now capture detailed information about scanning and deletion through VACUUM commands.
DX-94493

Known Issues

These terms were accidentally added to the list of reserved keywords: CLUSTER and CLUSTERING.
DX-88785

25.1.11 (May 2025) Enterprise

Improvements and Issues Fixed

General Updates

Fixed a memory leak on the coordinator when queries using Arrow Flight are canceled.
DX-102833
Resolved an issue with row count estimates in Delta Lake tables that could lead to suboptimal query plans.
DX-103030
Fixed an issue related to (background) metadata refresh so that it does not remove shared folders from Dremio’s object store even if they don’t have child datasets. It also does not remove stale folders if the “Remove dataset definitions if underlying data is unavailable” setting is toggled off, i.e., it does not remove stale datasets from Dremio’s object store.
DX-98837
Timeout for source health checks is now configurable.
DX-103689

APP

When saving an existing view into a new view (Save as View), the owner used to be the owner of the existing view. This fix changed the owner to be the user who created the new view.
DX-102562

25.1.10 (April 2025)

Improvements and Issues Fixed

General Updates

Improved error message handling for missing manifest files when reading Iceberg tables.
DX-92081
CVE-2025-30065 has been fixed by backporting the related fix from the Apache parquet-java project to Dremio's internal fork and using this latest build in the Dremio release.
DX-102461

25.1.9 (March 2025)

Improvements and Issues Fixed

General Updates

Reduced noise in the logs generated when reading data from Parquet files by changing the log level of certain messages from WARNING to DEBUG.
DX-101258
Fixed an issue where high setup times could be seen when running queries against Iceberg tables.
DX-100856

APP

Fixed an issue in which the Save as option for views returned an error when the dataset version history for the view had been corrupted.
DX-101506
Fixed an issue on the Jobs page where some jobs with Reflections are shown without creation times.
DX-96664
Added a new Rerun query on download option to the Preferences page in the Dremio console. When enabled, Dremio reruns the query before downloading the results.
DX-101308
Fixed an issue that prevented users from removing tables in their home space that were created by uploading files.
DX-101969

SQL

Resolved an issue with job state inconsistencies where CTAS jobs remained stuck in a running state and could not be canceled properly.
DX-99699, DX-96997
Started using system tables to retrieve tables sizes for Snowflake sources, instead of running COUNT(*) on each table, to resolve an issue with incorrect row count estimates.
DX-87198

25.1.8 (February 2025) Enterprise

Improvements and Issues Fixed

General Updates

Enhanced the flight.client.readiness.timeout.millis support key to allow the timeout to be set up to 8 hours.
DX-97193

SQL

Fixed an issue that could occur with class compilation when using a literal value in a window function.
DX-100466

25.1.7 (January 2025) Enterprise

Improvements and Issues Fixed

General Updates

Enabled Reflections for cases when there is an equivalent row and column access control (RCAC) filter on all children of a view that is the union of two or more datasets.
DX-95563
Fixed a memory leak issue during table scans that could lead to a query abort.
DX-98634

25.1.6 (January 2025) Enterprise

Improvements and Issues Fixed

General Updates

Fixed an issue with a permanent query slot loss in multi-coordinator setups that could gradually lose query concurrency slots on Workload Management (WLM) queues at very high loads when a client application pushes more queries to a particular WLM queue than the configured concurrency, causing the client application to time out and close its connection. Before the fix, restarting the coordinators was the only way to fix this issue.
DX-98355
Fixed a slow resource leak on the coordinator that can slow down queries and fill the heap memory for idle Workload Management (WLM) queues that are tied to engines. The leak is proportional to the number of idling WLM queues and may fix itself when a query is submitted to those queues.
DX-88418
Reduced internal page size to minimize heap pressure during parallel job execution against the sys.jobs_recent system table.
DX-96686
Updated the following libraries to address potential security issues:
- Aircompressor from 0.10 to 0.27 [CVE-2024-36114]
  DX-96853
- Avro from 1.11.3 to 1.11.4 within Dremio's packaged version of Hive [CVE-2024-47561]
  DX-96442
Disabled all TRACE web requests, which now return 405(NOT_ALLOWED) error codes.
DX-97052

SQL

Fixed an issue that could return a null value for a SELECT query on a column when schema learning is disabled and the column type is incompatible with the column values. When the table schema is inconsistent with the data, an error will now be reported to recommend that you enable schema learning so Dremio can properly manage the schema based on the data.
DX-88577
Fixed an issue that could cause ALTER TABLE to fail with a Schema change detected error when using the SQL command to drop and re-add a column with an incompatible type. Reporting has also improved for any instance where data cannot be coerced to the user-defined column type.
DX-87232
Added a new SQL function TRY_CONVERT_FROM to support converting a JSON type to a user-specified type. null is returned when the JSON cannot be converted.
DX-94338
The SQL function CONVERT_FROM for JSON now supports nested fields in ROW and STRUCT data types as input.
DX-94336
Fixed an issue in some cases that could prevent runtime filtering if the CONVERT_FROM SQL function was used in the query.
DX-93179
Fixed an issue that could cause an OutOfMemoryException(OOM) to be ignored in a HASH_JOIN operator, which is now explicitly thrown to prevent unexpected behavior with the HASH_JOIN.
DX-94029
Removed unsupported pushdown operations with VARCHAR data types from PostgreSQL advanced relational pushdown (ARP) connectors.
DX-98093

25.1.5 (December 2024) Enterprise

Improvements and Issues Fixed

General Updates

Older user-defined functions may store a null full path, which could cause a NullPointerException (NPE). We've mitigated the issue by preventing the NPE and logging a warning.
DX-97341
Fixed an issue that could prevent admin users from updating a script owner's privileges via the Scripts API.
DX-97879
Fixed an issue where a duplicated table schema could be written to its metadata file.
DX-97502
Improved filter pushdown phase timing for queries with too many union nodes.
DDX-96563

APP

Fixed an issue that could prevent users from seeing deeply nested files in a source's subfolders on the Datasets page because their access was denied.
DX-96147

SQL

Fixed a rare issue where decorrelating a subquery with an EXISTS statement and an empty GROUP BY clause could result in incorrect data.
DX-96652, DX-96946

25.1.4 (October 2024) Enterprise

Improvements and Issues Fixed

General Updates

Fixed an issue where queries could be stuck in planning and accumulate until a coordinator restart is required.
DX-94146
Fixed an issue that could cause an "Unable to find the reference field" error during query planning due to performing Common Subexpression Elimination (CSE).
DX-90660
Incompatible runtime filters are now ignored so as to avoid an UnsupportedOperationException while setting up Parquet readers.
DX-90910
Improved the planning time in the filter pushdown phase for a query with too many joins.
DX-96044
Fixed an SSL negotiation issue when connecting to Dremio servers through secure connections.
DX-96640

SQL

Fixed an issue with the ASCII function that could return an incorrect sign for values greater than 127 on Graviton.
DX-90311
Fixed a NullPointerException (NPE) that could cause VACUUM jobs for Reflections to fail.
DX-96262

25.1.3 (October 2024) Enterprise

What's New

Added the ability to set the Azure Client ID that Dremio should use for Azure Key Vault requests to disambiguate between multiple Azure user-assigned managed identities on Azure VMs or AKS deployments.
DX-94964, DX-94967
Added support for custom environment variables in dremio-cloud-tools Helm charts.
DX-94964, DX-95698

Issues Fixed

Fixed an issue where file handles (and HTTP connections) were left opened after reading JSON commit logs for Delta tables within a Hive source or AWS Glue Data Catalog.
DX-95340

25.1.1 (September 2024)

What's New

When no new data is read during REFRESH Reflection jobs, the snapshot IDs of the datasets and Reflections that they depend on are shown in the Refresh Decision section of the query profile.
DX-94785
Improved rendering of objects in the dataset tree on the SQL Runner page.
DX-93474
Decouple the logic that skips checking the validity within a configured timeframe from the seamless metadata refresh feature support key.
DX-94779

Issues Fixed

Fixed the NullPointerException in RowGroups querying Parquet files with incomplete stats.
DX-95188
The result summary table now sorts cached query results in the summary table on the SQL Runner page in the order that the queries are executed.
DX-95178
Fixed an issue that could prevent a Reflection score from being provided when running USE to set the query context.
DX-94786
Fixed an issue where a failed Reflection could show an incorrect record count and size in the sys.reflections system table.
DX-94304
Fixed an issue that could cause ANALYZE TABLE to fail when table column names contained reserved keywords.
DX-62870
Fixed an issue that could cause the CURRENT_TIME function to return incorrect data when a user's timezone is defined.
DX-94348
Fixed the issue of missing mount devices on large executor types in AWSE.
DX-89512
Fixed the IndexOutOfBoundsException that could occur during attempts to cache query results that include complex columns that contain all null values.
DX-94855
Fixed an issue in Community Edition (CE) that caused users to see an unexpected error when they clicked on the Scripts tab in the SQL Runner.
DX-95455

25.1.0 (September 2024)

What's New

Access Control

The Privileges dialog is improved for managing sources, views, tables, and folders.
DX-88582, DX-90927, DX-90926
On the Jobs page in the Dremio console, users who do not have the privileges VIEW JOB HISTORY and either CREATE USER or CREATE ROLE can no longer view the users filter.
DX-92150
The user avatar at the bottom of the left navigation bar now shows the user's first and last initials instead of the first two letters of their username.
DX-92060,DX-91263
Dremio now assigns 999 as the group ID (GID) and user ID (UID) for dremio:dremio at Docker image build time.
DX-94444
User impersonation is now supported for Microsoft SQL Server, Oracle, and Teradata sources.
DX-94366, DX-86351
Dremio now supports Java SE 17 (JDK 17) and offers new Docker images for Java SE 17.
DX-91359, DX-91848, DX-90803

Administration

AWS Graviton, a family of ARM-based processors, is now supported for Dremio software. AWS Graviton processors deliver high performance, energy efficiency, and cost savings for cloud workloads.
Out-of-the-box observability metrics are now available to admins for system resources such as memory usage, number of running executors, and more. See the Settings > Monitor page to see these metrics.
DX-86945
You can now migrate from Dremio AWS Edition (AWSE) to Dremio Enterprise Edition on Kubernetes using the dremio-admin command line interface (CLI). See Migrate AWSE to Kubernetes.
Dremio provides additional tools to migrate from AWSE to Dremio Cloud. Please contact your Dremio account executive or Dremio Support for details.
DX-88600
You can now cache results sets that are smaller than 20 MB to boost throughput and reduce response times for queries that are repeatedly used, such as dashboard-style queries.
DX-69614
Added seamless metadata refresh to ensure that you always query the latest versions of your Iceberg tables with minimal query planning overhead, no matter which data source contains the tables.
DX-94488, DX-69312
DML and CTAS are now supported for the query_label workload management rule.
DX-83628
Apache Arrow's Gandiva native library is now built and packaged for arm64 architecture.
DX-84485

API

note

The Catalog API Privileges endpoint is deprecated. We expect to remove it by July 2025. In place of the Privileges endpoint, use the Catalog API Grants endpoint to retrieve privileges and grantees on specific catalog objects.

The POST /api/v3/reflection/recommendations endpoint is deprecated. In place of this endpoint, use the job-based and usage-based Reflection recommendation endpoints.

DX-86120

You can now use the Scripts API to manage scripts from API clients for migration, management during owner offboarding, and other purposes.
DX-86946
You can now create and manage user-defined functions (UDFs) by API.
DX-90285
Added API endpoints for job-based and usage-based Reflection recommendations. Also increased the default maximum number of allowed jobs for the SYS.RECOMMEND_Reflections table function and corresponding APIs from 10 to 100 and added new columns to the output for the SYS.RECOMMEND_Reflections table function: reflection_score, average_improvement_factor, and average_improvement_ms.
DX-86120

Data Management

Dremio can now connect to Azure Storage or Google Cloud Storage when Nessie is used as a source.
DX-84214
Clicking on a dataset on the Datasets page or clicking the Open Results link on the Job Overview page creates a new tab that is not automatically saved as a script.
DX-93508
Dremio now supports bulk delete for scripts.
DX-90177
When formatting a file or folder as a table, you can now enable an option to ignore all non-Parquet files in the related folder structure so that the promoted table works as if only Parquet files are in the folder structure.
DX-88038
Added limits to prevent expression compilation failure for expressions beyond a certain level of complexity.
DX-88037
Dremio now supports writes using merge-on-read in Apache Iceberg table properties, which creates positional delete files and optimizes DML operations.
DX-85892, DX-91124, DX-68735, DX-83536, DX-83535
AWS Glue Data Catalog data sources can now pull and use Lake Formation tag policies. By default, this feature is turned off.
DX-87856
Users can now invalidate AWS Glue Lake Formation permission cache on demand using ALTER SOURCE or the Source API. Lake Formation tag policy support is also enabled by default.
DX-93068, DX-88976, DX-68918
You can now use the key-pair option as an authentication method for Snowflake data sources.
DX-92525, DX-65029
Query planning time for over-partitioned tables with complex partition filters is improved.
DX-86331, DX-90469
Added a rule that pushes an aggregate below a join if the grouping key is also a join key.
DX-68253
You can use autoingest pipes to set up and deploy event-driven data ingestion pipelines directly in Dremio. This feature is in preview and supports Amazon S3 as a source.
DX-84400

Deployments

Improved the security contexts in Helm charts.
DX-94452

Monitoring

You can download cluster logs directly from the Dremio console.

Reflections

Reflection recommendations automatically generate for the top 10 most effective default raw Reflections based on query patterns from the last 7 days. You can view these recommendations on the Reflections page in the Dremio console.
DX-86697, DX-86888, DX-89183
For Reflections on Iceberg tables, a new type of refresh policy is available. You can now automatically refresh Reflections for underlying tables that are in Iceberg format when new snapshots are created after an update.
DX-86348
For a given query with views, the Reflection recommender now provides an aggregation Reflection recommendation if possible instead of only default raw Reflection recommendations.
DX-89655, DX-83086
When a Reflection refresh job fails, Dremio now retries the refresh according to a uniform policy.
DX-91430, DX-89551
A Reflection score shows the value that a Reflection provides to your workloads based on the jobs that have been executed in the last 7 days.
DX-89559
SELECT queries in CREATE TABLE AS and INSERT/SELECT statements now use Reflections to accelerate the queries.
DX-94311
In the Job Details page, the Age column is renamed to Last Refresh from Table and now correctly calculates the maximum age of the data in a used Reflection.
DX-94230
Row-access and column-masking policies are now strongly consistent with default raw Reflection matching.
DX-90079

SQL

You can now use decimals in ARRAY_REMOVE and ARRAY_CONTAINS functions.
DX-89265
Dremio now supports the newline character \n in regular expression (regex) matching for the LIKE SQL function.
DX-82992, DX-87862
Added a timestamp pushdown for MAX and MIN SQL functions.
DX-89397
OPTIMIZE TABLE now supports Iceberg tables with equality deletes.
DX-88786, DX-90056, DX-92120, DX-68735
New SQL commands have been added for autoingest pipes: CREATE PIPE, ALTER PIPE, DESCRIBE PIPE, and DROP PIPE.
DX-84400
sys.pipes is a new system table that contains the metadata for autoingest pipes.
DX-89358
sys.pipe_summary is a new system table that summarizes high-level statistics for autoingest pipes. The table is only accessible to members of the ADMIN role.
DX-89808
Added a MAP_CONSTRUCT function to support the MAP data type.
DX-84305
You can now specify a column as a MAP data type in CREATE TABLE.
DX-90264

Issues Fixed

Updated Dremio's packaged version of Hadoop from 3.3.2 to 3.3.6 [CVE-2022-25168].
DX-87587
In AWS Edition (AWSE), fixed an issue that could cause some sources to be in bad state after upgrading. The issue affects only AWSE version 25+.
DX-93002
Added limits for option manager cache size and set expiration for items in the cache.
DX-91244
Fixed an issue that could prevent Reflections with a row-access or column-masking policy from accelerating queries after an upgrade.
DX-93126
Fixed a bug that could cause VACUUM jobs on Reflections to fail when using HDFS for distributed storage.
DX-92985
Fixed an issue that could cause VACUUM CATALOG to fail with a ContainerNotFoundException exception. Also fixed a bug that could cause VACUUM CATALOG to fail with IllegalArgumentException if a view is created in a Nessie catalog.
DX-93461, DX-94427
Reflections with complex type fields no longer show an unavailable status after a successful refresh.
DX-93493
Exiting the Reflections tab in Settings for tables and views no longer results in an unsaved-changes warning.
DX-91719
Fixed an issue that could cause Reflections to not be created for queries that contain an OVER clause with a specified RANGE.
DX-93800
Queries no longer fail if an underlying default raw Reflection becomes invalid for substitution against the view.
DX-85139
In the Reflections editor, the Refresh Now button no longer appears for a failed Reflection.
DX-93968
Reflection recommendations are now generated when plan regeneration is required and the name of the dataset is not fully qualified and contains a period (for example, "arctic1"."@username@dremio.com".v1).
DX-91895
Dremio no longer creates duplicate default raw Reflection recommendations when querying a view that contains joins.
DX-90602
When an incremental refresh materialization is deprecated, job history no longer lists a DROP TABLE job. Instead, the Reflection data is synchronously cleaned up as part of Reflection management.
DX-86800
Reflection refresh jobs no longer show zero planning time when the refresh is incremental.
DX-87548
In the output for the sys.Reflection.lineage function output, dataset name now shows both the path and the name of the dataset. Also, error messages for the sys.Reflection.lineage function are enhanced to clarify that external Reflections are not supported.
DX-93972, DX-93971
For Iceberg tables that are created from Parquet files that do not contain column IDs, Dremio now uses the table property schema.name-mapping.default to accurately locate and display these table columns instead of displaying null. When Parquet files do not contain column IDs, you can enable the support key dremio.iceberg.fallback_to_name_based_reader to use name-based reading.
DX-88490, DX-39653
Fixed a performance issue for Iceberg tables that could occur when Dremio reads position delete files. Previously, a position delete file could be accessed multiple times by different scan threads. Now all delete rows are read once and joined with the data files.
DX-92450
Added a client pool for more performant concurrent Hive metastore operations. Use the store.hive3.client_pool_size support key to control pool size (set to 0 to disable pooling).
DX-89821
Improved Dremio memory usage and fixed an issue that caused a memory leak exception.
DX-91437, DX-90445
To prevent unexpected out-of-memory errors, the Parquet vectorized reader allocates only the necessary amount of memory for scanning deeply nested structures.
DX-90471
Reduced memory usage when SELECT statements are run from the information schema by adjusting the page size parameter for pagination.
DX-88389
The CSV reader now uses direct memory instead of heap memory.
DX-87586
Fixed an issue that could cause queries to fail during planning with the error "Job was canceled because the query is too complex".
DX-92283
Queries now succeed even if telemetry storage fails. While a query is running, the executors and the coordinator send telemetry about the query execution to the JTS, which is written to a persistent store when the query completes or fails. This incomplete telemetry is indicated in the Job Details page for transparency. is_profile_incomplete has been added in the system.project.jobs table to indicate the profile status and incomplete data.
DX-86907
Fixed an issue that could cause queries to fail with a ConcurrentModificationException error when using Java virtual machine (JVM) 17.
DX-92029
Reading a Delta Lake table no longer results in an error about an invalid Parquet file.
DX-79957
The schema for Delta Lake tables is now captured correctly, resolving the issue that could cause a NullPointerException and failure to query the table.
DX-92477
Fixed a rare NPE that could occur when accessing large Delta Lake tables in metastore sources.
DX-67629
Fixed an issue when reading Delta Lake checkpoint files for partitioned tables that could result in 0 rows returned.
DX-92976
The query planner no longer fails for queries that use experimental settings related to the bushy join optimizer.
DX-91859
MIN_REPLICAS and MAX_REPLICAS are no longer considered reserved keywords for SQL queries.
DX-93664
Correlated subqueries no longer generate plans with indexing issues.
DX-90745
For MongoDB tables, Dremio now adds an exclusive projection to queries if no projection exists and properly excludes dropped fields from queries. This resolves issues involving maximum field size and leaf nodes and potentially improves performance.
DX-85874
Fixed an issue that prevented Hive sources that use assumed roles from running asynchronous queries via the "Enable asynchronous access for Parquet datasets" option.
DX-84153
Queries no longer fail due to a ConcurrentModificationException when runtime filters are present.
DX-91670
The flow of queries is no longer coupled with query telemetry, which meant that failure scenarios in the flow could affect query completion rates. Queries now succeed despite any failures with query telemetry processing or JTS availability, even in case of incomplete profile information.
DX-90237
Queries no longer hang on coordinator startup when the materialization cache takes a long time to start up.
DX-92627
Fixed a bug for complex queries that could result in an error message about the code being too large.
DX-90491
Fixed a performance issue that affected queries that contain a window function and a large number of batches.
DX-93506
Switching between scripts while a job is running no longer causes the job to appear in other tabs.
DX-92260
Running a subset of a script now highlights the appropriate queries when switching between results tabs.
DX-92143
Opening a script and applying a transformation on a saved job now works as expected.
DX-92754
The current owner of a script is now correctly displayed in the Dremio console.
DX-91531
Fixed issues that could result in an incorrect script count after deleting all scripts or deleting a temporary script.
DX-93518, DX-93507
For MapR deployments, removed configuration properties MAPR_MAX_RA_STREAMS and MAPR_IMPALA_RA_THROTTLE from the dremio start script and from the code responsible for Yarn configuration.
DX-88701
Fixed a ClassCastException bug in the MongoDB data source connector.
DX-88468
Fixed a bug that could leak unclosed data source connections in Dremio, Microsoft SQL Server, and Oracle ARP connectors.
DX-88468
Dremio now throws a concurrent error message if metadata refresh fails due to a Nessie exception.
DX-54677
COPY INTO error handling now provides record position information for coercion errors with Parquet input files.
DX-91421
Fixed the issue with incorrect dataset version sorting that could result in "not found" error messages when listing datasets in the Dremio console.
DX-91598
Fixed an issue that could result in a NullPointerException when running a DML statement on an accelerated table.
DX-91682
ORDER BY expressions in a subquery should be removed automatically as long as the query does not have LIMIT or OFFSET parameters, although the returned sort order cannot be guaranteed. In this example, ORDER BY deptno should be removed:
```
SELECT *
  FROM emp
  JOIN (SELECT * FROM dept ORDER BY deptno) USING (deptno)
```
Some databases like Postgres and Oracle support ORDER BY expressions, so you may see different results depending on the target of your query.
DX-90962
Improved query performance for VACUUM TABLE when using EXPIRE SNAPSHOTS.
DX-64906
OPTIMIZE TABLE statements that end with semicolons are now supported in the SQL Runner.
DX-85903
Fixed an issue that could prevent partition columns from being applied in INSERT and CREATE TABLE AS statements.
DX-83067
You can now clear the context for the query session by running the USE command without any parameters.
DX-90731
Fixed issue that could prevent the spillable hash join operator from being chosen despite having a large number of rows.
DX-89967
Fixed an issue that could cause the ARRAY_AGG function to return incorrect results when performed on a variable width column that contains intermittent NULL values.
DX-90449
LEAD and LAG functions with the window set to a value that is greater than 1 no longer produce incorrect results.
DX-91557
Dremio now resolves user-defined functions (UDFs) correctly whether a function is fully qualified and even when the view is opened in a different session path context than the function.
DX-93580
Indexing into the CONVERT_FROM SQL function for the same JSON no longer produces incorrect results.
DX-90636
Fixed an issue where the TO_DATE function was used with invalid options.
DX-90413
Dremio now honors workload management rules that contain the QUERY_LABEL function.
DX-83628
Fixed an issue that could result in incorrect row group pruning when the statistics are empty for Parquet files.
DX-90854
Fixed an issue with concurrent metadata refreshes that could result in duplicate metadata entries for Parquet files.
DX-91849
To create sessions for Arrow Flight JDBC/ODBC connections, Dremio now uses the username from the registered upstream (Mongo store/LDAP) instead of the username passed in the connection URL.
DX-89745
Fixed an issue that could result in a leak from an unclosed connection in Microsoft SQL Server, Oracle, or Dremio cluster data sources.
DX-94504
Usernames in Arrow Flight JDBC/ODBC and Legacy JDBC/ODBC jobs are now shown in consistent case regardless of the username case in the connection URL.
DX-89743, DX-41303
To prevent conflicts between SLF4J 1.x and 2.x, the Dremio JDBC driver no longer exposes the SLF4J API and uses the java.util.logging (JUL) framework to log messages. The application can be configured for the parent logger for the driver by using java.sql.Driver#getParentLogger() or directly using java.util.logging.Logger#getLogger("com.dremio.jdbc").
DX-56164
Fixed an issue that could introduce duplicate rows in the results for RIGHT and FULL joins with non-equality conditions and join conditions that use calculations.
DX-92155
Joins with non-equality conditions and join conditions that use calculations no longer introduce duplicate rows (while respecting desired filtering properties) into the result set.
DX-90720
Fixed an issue with long calls to an AWS Glue data source that could result in a deadlock, preventing the Glue database from appearing as a source in the Dremio console and privileges granted to roles and users from applying properly to that source.
DX-92480
Fixed an issue that could occur if AWS Lake Formation tag policies are present, but no Lake Formation tags are defined on a certain table.
DX-89519
The AWS Lake Formation tag authorizer now considers database-level tags.
DX-90618
Improved messaging that originates from the Hive3 plugin engine for cases in which other source types are served, such as Hive 2.x or AWS Glue.
DX-87596
In the Workload Management API, the default rule is now included in responses to requests to retrieve all rules for new clusters.
DX-90072
Folder naming requirements are now consistent between the Dremio console and the Catalog API. Folder names cannot include the following special characters: /, :, [, ], or ".
DX-90489
Listing catalog objects with the Catalog API no longer times out due to a very large number of catalog objects. To address the issue, optional pageToken and maxChildren parameters have been added to the API endpoints for getting catalog objects with children by ID or by path.
DX-90461
The lineage graph no longer lists identical parent objects multiple times.
DX-92481
In the Dremio console, ideographic spaces now display as regular spaces in the results.
DX-64971
Disabling Download Query Profiles now properly restricts users from downloading profiles.
DX-91661
Tooltips on the Catalog page now display correctly in Firefox.
DX-90884
The option to enable single sign-on for Tableau is now disabled by default.
DX-93910
Fixed an issue with filter pushdown that could result in failure to properly create empty subtrees.
DX-92490
The dremio-admin restore CLI command now properly terminates after restore finishes.
DX-20513
For EC2 instances, Dremio now appends the bind mount record to /etc/fstab for persistence, which prevents issues with sources in a bad state after rebooting EC2 instances.
DX-94264
Values that contain UNICODE characters like 'á' no longer result in incorrect splitting.
DX-89965

Known Issues

Reflections created in Dremio 20.0.x and previous versions may be less performant in 25.1.0. Regenerate the Reflections to improve performance.
DX-84453
If you are upgrading from Dremio version 25.0.0 through 25.0.4 and you previously set the support key store.dataset.versions.limit to a large number like 100000 to prevent trimming versions, we recommend resetting the value to 50 (the default).
DX-92449
If you are upgrading from Dremio version 22.1.5 or earlier, we recommend reindexing your data.
DX-91833

25.0.17 (April 2025) Enterprise

Improvements and Issues Fixed

General Updates

Reduced noise in the logs generated when reading data from Parquet files by changing the log level of certain messages from WARNING to DEBUG.
DX-101258
Fixed a memory leak issue during table scans that could lead to a query abort.
DX-98634
CVE-2025-30065 has been fixed by backporting the related fix from the Apache parquet-java project to Dremio's internal fork and using this latest build in the Dremio release.
DX-102461

25.0.16 (April 2025) Enterprise

Improvements and Issues Fixed

General Updates

"Failed to open file" error messages for Iceberg now reference an input file by the file path's location instead of the object ID.
DX-102345

APP

Fixed an issue that prevented users from removing tables in their home space that were created by uploading files.
DX-101969

25.0.15 (March 2025) Enterprise

Improvements and Issues Fixed

Fixed a memory leak issue during table scans that could lead to a query abort.
DX-98634

25.0.14 (December 2024) Enterprise

Improvements and Issues Fixed

Fixed a slow resource leak on the coordinator that can slow down queries and fill the heap memory for idle Workload Management (WLM) queues that are tied to engines. The leak is proportional to the number of idling WLM queues and may fix itself when a query is submitted to those queues.
DX-88418
Fixed an issue with a permanent query slot loss in multi-coordinator setups that could gradually lose query concurrency slots on Workload Management (WLM) queues at very high loads when a client application pushes more queries to a particular WLM queue than the configured concurrency, causing the client application to time out and close its connection. Before the fix, restarting the coordinators was the only way to fix this issue.
DX-98355
Updated the following library to address potential security issues:
- Avro from 1.11.3 to 1.11.4 within Dremio's packaged version of Hive [CVE-2024-47561]
  DX-96442
Fixed an issue that could cause the SQL Runner to display the view definition of the last executed preview instead of the saved view definition.
96707
Fixed an issue that could cause a REFRESH REFLECTION job to not pull new data for an external query, causing stale data to be returned when using the Reflection.
DX-98107
Fixed an issue that could cause garbage collection logs to not be accessible.
DX-98240

25.0.13 (December 2024) Enterprise

Improvements and Issues Fixed

Fixed an issue that could occur when runtime filter is used with another pushdown filter on VARCHAR columns.
DX-97228
Fixed an issue where pushdown filters on Parquet V2 files could produce incorrect results.
DX-98029

25.0.12 (November 2024) Enterprise

What's New

The SQL function CONVERT_FROM for JSON now supports nested fields in ROW and STRUCT data types as input.
DX-94336

Improvements and Issues Fixed

Fixed an issue where a duplicated table schema could be written to its metadata file.
DX-97502

25.0.11 (October 2024) Enterprise

Improvements and Issues Fixed

Fixed an issue where queries could be stuck in planning and accumulate until a coordinator restart is required.
DX-94146
Reduced internal page size to minimize heap pressure during parallel job execution against the system table.
DX-96686
Incompatible runtime filters are now ignored so as to avoid an UnsupportedOperationException while setting up Parquet readers.
DX-90910
Improved filter pushdown phase timing for queries with too many union nodes.
DDX-96563

25.0.10 (October 2024) Enterprise

Issues Fixed

Fixed an issue where file handles (and HTTP connections) were left opened after reading JSON commit logs for Delta tables within a Hive source or AWS Glue Data Catalog.
DX-95340

25.0.9 (September 2024) Enterprise

Issues Fixed

Fixed the NullPointerException in RowGroups querying Parquet files with incomplete stats.
DX-95188
Fixed an issue that could cause the CURRENT_TIME function to return incorrect data when a user's timezone is defined.
DX-94348
Fixed an issue when reading Delta Lake checkpoint files for partitioned tables that could result in 0 rows returned.
DX-92976
Fixed a performance issue for Iceberg tables that could occur when Dremio reads position delete files. Previously, a position delete file could be accessed multiple times by different scan threads. Now all delete rows are read once and joined with the data files.
DX-92450

25.0.8 (August 2024) Enterprise

Issues Fixed

In AWS Edition (AWSE), fixed an issue that could cause some sources to be in bad state after upgrading. The issue affects only AWSE version 25+.
DX-93002
Memory tracking issues that could cause queries to be cancelled due to exceeding the memory limits are fixed (with Memory Arbiter enabled and high memory utilization on the node).
DX-89359
Dremio now uses multiple writers in parallel for non-partitioned table optimization. The small files generated during writing are combined by another round of writing with a single writer.
DX-88174
Fixed an issue that could affect Java virtual machine (JVM) memory calculations.
DX-87463
Usernames in Arrow Flight JDBC/ODBC and Legacy JDBC/ODBC jobs are now shown in the same consistent case regardless of the case in the connection URL.
DX-41303
Dremio now uses a key generation algorithm that follows industry best practices without causing a slowdown during upgrade in some environments.
DX-92906
The lineage graph no longer lists identical parent objects multiple times.
DX-92481
Fixed an issue with unlimited splits that could result in duplicate metadata entries for Parquet files.
DX-91849
Fixed an issue that could result in incorrect row group pruning when the statistics are empty for Parquet files.
DX-90854

25.0.7 (July 2024) Enterprise

Issues Fixed

In AWS Edition (AWSE), fixed an issue that could cause some sources to be in bad state after upgrading. The issue affects only AWSE version 25+.
DX-93002

25.0.6 (July 2024) Enterprise

Issues Fixed

Fixed an issue that could affect Java virtual machine (JVM) memory calculations.
DX-87463

25.0.5 (July 2024) Enterprise

What's New

Added a new Dataset API endpoint, POST /dataset/{id}/reflection/recommendation/{type}, for retrieving Reflection recommendations by Reflection type for a dataset.
DX-89497
You can use the export.tableau.extra-flight-connection-properties support key to disable certificate verification, for example in .tds files.
DX-91831

Issues Fixed

You can now generate suggestions for aggregate Reflections by clicking a button in the Reflections tab in the Dremio console. Dremio no longer automatically collects statistics and generates a suggestion when you open the Reflections tab.
DX-89306
The schema for Delta Lake tables is now captured correctly, resolving the issue that could cause a NullPointerException and failure to query the table.
DX-92477
Fixed an issue that could result in a NullPointerException when running a DML statement on an accelerated table.
DX-91682
Fixed an issue that could cause queries to fail during planning with the error "Job was canceled because the query is too complex".
DX-92283
The profile manager now renders successfully in the Dremio console even when the accelerationDetails field is skipped.
DX-92066
Fixed a bug that could cause the default selected columns for raw Reflections to fail to include all columns of a dataset.
DX-89497
Fixed a ClassCastException bug in the MongoDB data source connector.
DX-88468
Dremio field size limits now apply properly for the output of the ARRAY_AGG SQL function.
DX-87000
For MongoDB tables, Dremio now adds an exclusive projection to queries if no projection exists and properly excludes dropped fields from queries. This resolves issues involving maximum field size and leaf nodes and potentially improves performance.
DX-85874
When a Reflection with a refresh status of type Manual is not available for acceleration and fails to refresh, users will now see a red failure icon instead of a yellow warning icon in the Dremio console.
DX-71027

25.0.4 (June 2024) Enterprise

What's New

Dremio now supports HashiCorp Vault's Kubernetes authentication method for retrieving secret references to use for connecting to data sources and listing secrets in Dremio configuration files. Read Using HashiCorp Vault for Secrets Management for more information.
DX-84473 DX-89104
The results of previously run queries now load much more quickly. After you open a saved script in the SQL Runner, the results are automatically displayed in a summarized format if at least one job in the script has successfully completed. To load the results of a specific query, select the query tab above the results table.
DX-90110 DX-90627
For MapR deployments, removed configuration properties MAPR_MAX_RA_STREAMS and MAPR_IMPALA_RA_THROTTLE from the dremio start script and from the code responsible for Yarn configuration.
DX-88701
Dremio now introduces cache before calling the AWS and Azure credentials API, which improves performance by reducing excessive CredentialsService.lookup() calls.
DX-90965
The dremio-admin backup and dremio-admin restore CLI commands now include the security folder. Manual backups of the security folder are no longer needed.
DX-90705
Improved handling of the ROLLUP aggregate SQL function.
DX-83225

Issues Fixed

Updated the following libraries to address potential security issues:
DX-91055 DX-91138
- org.postgresql:postgresql to version 42.4.5 [CVE-2024-1597]
- com.amazon.redshift,redshift-jdbc42 to version 2.1.0.28 [CVE-2024-32888]
Correlated subqueries that include a filter that doesn't match any rows no longer result in an error message.
DX-91553
Reflections that contain temporal functions no longer skip refreshing.
DX-90966
Fixed an issue that prevented Hive sources that use assumed roles from running asynchronous queries via the "Enable asynchronous access for Parquet datasets" option.
DX-84153
Indexing into the CONVERT_FROM SQL function for the same JSON no longer produces incorrect results.
DX-90636
The TYPEOF SQL function now returns the precise type for nested members in complex types.
DX-89806
To prevent unexpected out-of-memory errors, the Parquet vectorized reader allocates only the necessary amount of memory for scanning deeply nested structures.
DX-90471
Restoring now works properly for AWSE deployments.
DX-90389
Using autocomplete in the SQL Runner no longer causes issues with overflow.
DX-87864
In the Dremio console, ideographic spaces now display as regular spaces in the results.
DX-64971
An error message no longer appears when loading results of multiple jobs that are executed on different engines.
DX-91291
When using an IAM role and attempting to add an AWS Glue source, you no longer see an error message about loader constraint violation due to AWS Glue authentication.
DX-91213
Reflections no longer produce incorrect results due to incorrectly matching into queries that include the ROLLUP option.
DX-90879
Fixed an issue where the TO_DATE function was used with invalid options.
DX-90413
Creating a new script while on a script that displays an error message no longer causes the error message to persist.
DX-90122
Fixed an error where planning a query could fail with a "Cannot add expression to different types of set" message.
DX-90032
Switching between the tabs in the SQL editor now correctly displays the job type.
DX-89787
Memory tracking issues that would cause queries to be cancelled due to exceeding the memory limits are fixed (with Memory Arbiter enabled and high memory utilization on the node).
DX-89359
Query profiles no longer show planning phases twice.
DX-89262
Reading a Delta Lake table no longer results in an error about an invalid Parquet file.
DX-79957
Reflections with row and column access control (RCAC) now produce the correct results when algebraically matched.
DX-90178
Fixed an issue that could introduce duplicate rows in the results for RIGHT and FULL joins with non-equality conditions and join conditions that use calculations.
DX-92155
View schema learning now occurs only for queries that are issued from the Dremio console or Reflection refresh jobs.
DX-91903
The query planner no longer fails for queries that use experimental settings related to the bushy join optimizer.
DX-91859
Fixed the issue with incorrect dataset version sorting that could result in "not found" error messages when listing datasets in the Dremio console.
DX-91598
Reading an Iceberg table with equality deletes via Glue or Hive no longer results in an error.
DX-90377
Fixed the NullPointerException (NPE) in logging while refreshing metadata for Delta Lake tables.
DX-89302
LEAD and LAG functions with the window set to a value that is greater than 1 no longer produce incorrect results.
DX-91557
In the Dremio console, you can now properly schedule Reflection refreshes.
DX-90145
Dremio now throws a concurrent error message if metadata refresh fails due to a Nessie exception.
DX-54677

25.0.3 (May 2024) Enterprise

Issues Fixed

Joins with non-equality conditions and join conditions that use calculations no longer introduce duplicate rows (while respecting desired filtering properties) into the result set.
DX-90720

25.0.0 (April 2024)

note

The backup and restore procedures for Dremio 25.0.0 include steps for preserving the security folder and updating certain permissions on it. These steps are required so that source connection does not fail during Dremio startup. Follow the backup and restore procedures carefully when upgrading to Dremio 25.0.0.

What's New

Enabled the memory arbiter by default in order to monitor the usage of four key operators: HASH_AGGREGATE, HASH_JOIN, EXTERNAL_SORT, and TOP_N_SORT. This usage is monitored across all queries running on an executor to improve how the executor utilizes its direct memory and to reduce OutOfMemoryException errors.
DX-48798
- If the memory arbiter detects that the memory usage is too high, then the memory usage will be reduced in these two ways:
  - Starting with the biggest consumers, some of these operators will need to reduce their memory usage mainly by spilling to disk.
  - Memory allocations will be blocked.
Changes to the logback configuration are now automatically applied without requiring a restart. To ensure that this feature is enabled when you upgrade to Dremio 25.0.0, take care to avoid replacing the installed conf/logback.xml file with your backup copy.
DX-56684
Enabled HASH_JOIN to spill to disk by default when the memory allocated for a query is fully utilized.
DX-48798
Out-of-the-box observability metrics are now available for user activity and jobs such as most active users, longest running jobs, most queried datasets, and more. See the Settings > Monitor page to see these metrics.
DX-86592 DX-83785
Improved the robustness of the embedded metadata pointer store.
DX-85034
Added support for column mapping within Delta Lake tables, effectively supporting minReaderVersion 2.
DX-62046 DX-87465
Enabled checksum-based verification for Azure Blob Storage and Data Lake Gen 2 sources to ensure data integrity during network transfers.
DX-66932
Added support for the ARRAY_FREQUENCY SQL function. It takes an array as input and produces MAP with array values as keys and corresponding frequencies as values.
DX-67298
You can use the Recommendations API to submit job IDs of jobs that ran SQL queries, and receive recommendations for aggregation Reflections that can accelerate those queries. See Recommendations for more information.
DX-68447
Added support for creating Reflections on views and tables with row-access and column-masking policies defined on any of the underlying anchor datasets. See more information.
DX-68923 DX-89495
Added support for configuring Reflection refreshes to occur on a schedule.
DX-68532
Added the configuration option services.coordinator.web.auth.login_additional_latency_millis for ensuring that login successes and failures take about the same amount of time. This makes all login requests (successful or not) slower, which makes brute force attacks harder. This configuration option can be turned off. It is on by default.
DX-83373
Added the SKIP_FILE option to the COPY INTO SQL command. The SKIP_FILE option specifies that the COPY INTO operation should stop processing the input file at the first error it encounters.
DX-84448
You can now refresh Reflections by using an API method, ALTER TABLE, and ALTER VIEW. You can also refresh Reflections on views by using the Catalog API.
DX-84529
Added support for getting recommendations about what default raw Reflections to create.
DX-84616
Added support for showing the date and time that a Reflection's data was last refreshed. If the refresh is running, failing, or disabled, the value is 12/31/1969 23:59:59. The date and time are available in the Dremio console and via the Reflection API.
DX-84702
Added two new ways for starting the refresh of a Reflection:
- On the Settings > Reflections page, hover over the row about the Reflection and click the refresh icon.
- In the Advanced view of the Reflections editor, click the refresh icon above the table that describes the content of the Reflection.
  DX-84774
Added support for reading Apache Iceberg tables with equality deletes.
DX-84522
Added support for Hive on GCS.
DX-84898
Added a new refresh status: Pending. This status means that the refresh of a Reflection will begin after the refreshes of its anchor and all downstream tables and views are finished.
DX-84941
Added support for ZooKeeper 3.5.6 and later.
DX-53228
Disabled C3 caching during the loading of Parquet source files via the COPY INTO operation, thereby reducing cache contention with other query workloads.
DX-85365
Improved Dremio's capabilities for concurrent DML operations on Iceberg tables and improved error messaging for concurrent load failures.
85437
Added to Reflection Summary objects of the Reflection API and the SYS.PROJECT.Reflections table the error message that explains the most recent failure of a refresh of a Reflection. No message appears if no refresh has yet been attempted, no failure has occurred, or a successful refresh has followed a failed one.
DX-85499
Added support for performing incremental refreshes on Reflections that are defined on views that use joins.
DX-84768

DX-85818
Changed the tabs in the SQL runner to display the most recent results of a query, if the results are available from the job history, without the user having to run the query again.
DX-85843
Added support for copy_errors() table function on Parquet tables.
DX-87332
Removed the following support keys because they were enabled by default over several major releases:
- dremio.deltalake.enabled (introduced in 14.0, enabled by default in 17.0)
- store.deltalake.hive_support.enabled (introduced as enabled by default in 24.0)
- store.deltalake.spark_support.enabled (introduced as enabled by default in 24.1)
- dremio.deltalake.time_travel.enabled (introduced as enabled by default in 24.2)
- dremio.execution.support_unlimited_splits (introduced as enabled by default in 21.0)
- dremio.iceberg.enabled (introduced in 11.0, enabled by default in 21.0)
- dremio.iceberg.ctas.enabled (introduced as enabled by default in 22.0)
- dremio.iceberg.rollback.enabled (enabled by default in 24.0)
  DX-87789 DX-87491 DX-53796 DX-87898
Added support for limiting access to specified databases on Glue sources.
DX-87812 DX-88223 DX-88420 DX-87811
Upgraded Netty libraries to version 4.1.104.
DX-86156
Added daily catalog maintenance tasks to trim history of views to a maximum of 50 records per view. This limits the storage needed for datasetVersions records in the KV store.
DX-86156 DX-87549
To improve Reflection observability, in the Reflection tab in the settings, the Dataset column is now wider and truncates after two lines. Also, users now receive a notification if the materialization cache is uninitialized for Reflections as well as a message when hovering on the status icon for Reflections whose caches are initializing.
DX-86891 DX-86890
In the Reflection tab in the settings, users can now retry a refresh on all unavailable Reflections.
DX-86889
Reflection recommendations are now associated with the corresponding job IDs.
DX-86726 DX-86672
Improved reliability and memory efficiency for Dremio coordinators.
DX-86245 DX-86675
Privilege changes are processed more quickly in the Dremio console.
DX-87547
To improve performance, users can now push filters past sort operations.
DX-88119
No data is read in the REFRESH Reflection job for Reflections that are dependent only on Iceberg, Parquet, Avro, non-transactional ORC datasets, or other Reflections and have no new data since the last refresh.
DX-86353

Issues Fixed

Fixed the handling of SQL functions, such as LOWER, UPPER, and REVERSE, in queries on system tables.
DX-52626
Reduced the heap memory used by the SORT operator.
DX-53594
TCP-DS queries no longer fail with an error that says the table or column is not found.
DX-87797
AWSE upgrades no longer fail with the error Unexpected global state.
DX-88393
Fixed gRPC exceptions in the Dremio console due to improper handling of transient server errors.
DX-25300
The APPROX_COUNT_DISTINCT function now properly calculates the approximate count distinct rather than the exact count distinct.
DX-84197
The Save button for Reflections defined on views in spaces would be enabled for public users who have only SELECT, EDIT, and VIEW Reflection privileges. Such users still were correctly prevented from modifying Reflections, as clicking Save did nothing.
DX-84684
Discontinued the hive-universal build. As of this change, Hive 2.x sources are driven by Hive 3 plugin in the main build. Hive 2 libraries and artifacts (and the Hive 2 Dremio plugin itself) are omitted from the installation directory.
DX-85203
Added the dremio-job-id property to the metadata for Iceberg tables in Glue sources.
DX-85379
Fixed an issue where certain queries returned incorrect results when multiple Nullable columns were referenced in conditions with OR operators.
DX-85581
Added a check to determine whether users running the COPY INTO command have SELECT privileges on either the source storage location specified in the FROM clause or on each individual source file mentioned in the FILES clause.
DX-85977
Fixed an issue that allowed Reflections to be created when their definitions included UDFs that contained context-sensitive functions.
DX-86078
Dremio no longer caches CURRENT_DATE_UTC and CURRENT_DATE during query planning, which was causing incorrect results. As a result, queries that use CURRENT_DATE_UTC and CURRENT_DATE have some performance latency in favor of accurate results.
DX-86078
Fixed an issue that caused an aggregation Reflection sometimes to be created automatically when a raw Reflection was created.
DX-85098
Fixed an issue that caused a message about a failed query to appear after the switch from one SQL tab to another.
DX-86514
Fixed an issue in the SQL Runner where expanding the large data field by using the ellipsis (...) caused the results to be unresponsive when the data included DateTime objects.
DX-86541
Fixed an issue that caused the SQL function APPROX_COUNT_DISTINCT to return null instead of 0 in some cases.
DX-86597
Ensured that group policy grants are respected in AWS Lake formation when Dremio is used with Okta.
DX-86923
Fixed an issue that occurred if "All tables" was selected during AWS Lake formation and the granting of a new permission that was meant to apply to all tables within the selected database.
DX-86925
Fixed an issue that caused the details of jobs not to be updated in the Dremio console when jobs were running.
DX-86983
Fixed an issue that caused the creation of a new branch to update the context of the SQL Runner automatically.
DX-87039
Fixed an issue that could cause the skip_file option of the COPY INTO SQL command not to handle Parquet file corruption issues if they are in the first page of a row group.
DX-87884
Reduced the severity of log messages about function lookup for Hive functions so that they are no longer listed as errors.
DX-83930
The Settings button is now shown at the top-right of the page when navigating to a Nessie source.
DX-88053
Authentication with a secret resource URL now works properly for Amazon Redshift, Oracle, and PostgreSQL data sources.
DX-88293
In Kubernetes environments, the Dremio load balancer service now remains active during dremio-admin operations.
DX-85396
In Kubernetes environments, you can now write logs to a file on disk in addition to stdout.
DX-68047
Reading Iceberg tables with positional deletes no longer causes an IndexOutOfBoundsException.
DX-87252
The Details panel is no longer blank when opened from the menu in a Nessie source.
DX-87923
The commit history for MERGE commands run in the Dremio console no longer show the user ID instead of the user email.
DX-88377
Creating a raw Reflection on a dataset on which no Reflections are already defined no longer creates an aggregation Reflection.
DX-86098
The Go to Table () button now appears on the Datasets page for tables and views when the Query on click preference is disabled. The button also appears on lineage graphs for tables.
DX-85964 DX-84694
You can disable analytics data from being sent to Intercom using the dremio.ui.outside_communication_disabled support key.
DX-86316
Fixed a bug that was causing sub-optimal query plans for queries with partition column filters.
DX-86309

Breaking Changes

Dremio no longer supports Java 8. A Java 11 SE JDK is now required. Failing to install a Java 11 SE JDK will result in an error at startup. In your dremio-env config files, you may need to remove any Java command line options that are not supported by Java 11 from the DREMIO_GC_OPTS and DREMIO_JAVA*EXTRA_OPTS variables. Yarn users may need to change the engine configuration to provide the path to a valid Java 11 environment by setting the JAVA_HOME environment in the engine properties.
DX-86534
ZooKeeper 3.4 has reached end-of-life and is no longer supported. Using ZooKeeper 3.4 will result in an error at startup. Dremio recommends ZooKeeper 3.6 or later.
DX-88450
Queries with ambiguous columns, including queries for creating views, are no longer supported and will result in an error. To prevent this, make sure the same column name is not listed twice, for example:
DX-83702 DX-86763
```
SELECT * FROM (SELECT id, 2 AS id FROM (VALUES (1, 'one')) AS t(id, name))
```

To resolve the issue, rewrite the query to change one of the column names and remove the ambiguity. In this example, the first id is changed to id0:

SELECT * FROM (SELECT id, 2 AS id0 FROM (VALUES (1, 'one')) AS t(id, name))

You must also recreate any previous views that were created using ambiguous columns.

The 24.2-hive-universal package is deprecated in 25.0.0. If you have a Hive 2 data source, follow the instructions for upgrading to 25.0.0. We recommend that you invest extra time to test Hive 2 use cases in a test environment before deploying to production.
DX-86273
Renamed support key planner.writer.round_robin' to planner.writer.round_robin.
DX-85350

Known Issues

As of version 25.0.0, Dremio supports encrypted data source credentials. For this reason, when you upgrade to Dremio 25.0.0, if you want RocksDB to contain only encrypted credentials for your existing data sources, you must clear the RocksDB cache using the following steps:

Run dremio-admin upgrade.
Run dremio start and wait for Dremio to start up.
Run dremio stop.
Run dremio-admin clean --compact.
Run dremio start.

To confirm that all existing data source credentials were encrypted successfully, check the server log from step 2 for messages like these:

2024-03-19 18:17:02,209 [main] INFO  c.dremio.exec.catalog.PluginsManager - Successfully migrate the source [s3]. Took 4531 milliseconds.
2024-03-19 18:17:02,236 [main] INFO  c.dremio.exec.catalog.PluginsManager - Successfully migrate the source [glue]. Took 26 milliseconds.
2024-03-19 18:17:02,236 [main] INFO c.dremio.exec.catalog.PluginsManager - Did not need to migrate the source [<source_name>]. Took 26 milliseconds.
2024-03-19 18:17:02,236 [main] INFO  c.dremio.exec.catalog.PluginsManager - Completed sources migration. Total: 4611 milliseconds.

Issues may occur when reading Apache Iceberg tables with equality deletes from Hive or Glue sources. To resolve this issue, upgrade to version 25.0.4.
DX-90377
Incorrect dataset version sorting can result in "not found" error messages when listing datasets in the Dremio console. To resolve this issue, upgrade to version 25.0.4.
- If you cannot upgrade to version 25.0.4, mitigate this issue by setting store.dataset.versions.limit option to a high number, such as 100000. This prevents version trimming but increases database size. When you upgrade to 25.0.4, you must restore the store.dataset.versions.limit option setting to the default value, 50, to control database size.
  DX-91598

DX-85812 was already added to the release notes for 24.0.0.

DX-84620 was already added to the release notes for 24.0.0.

DX-65078 was already added to the release notes for 24.2.5.

DX-85901 was already added to the release notes for 24.3.2.

DX-74000 was already added to the release notes for 24.3.3.

DX-85123 was already added to the release notes for 24.3.3.

DX-56534 was already added to the release notes for 24.3.3.

DX-69759 was already added to the release notes for 24.3.3.

DX-86414 was already added to the release notes for 24.3.3.

DX-88043 was already added to the release notes for 24.3.4.

DX-87086 was already added to the release notes for 24.3.4.

DX-87660 was already added to the release notes for 24.3.4.

DX-86125 was already added to the release notes for 24.3.4.

DX-87876 was already added to the release notes for 24.3.4.

DX-87580 was already added to the release notes for 24.3.4.

DX-88194 was already added to the release notes for 24.3.4.

DX-86919 was already added to the release notes for 24.3.4.

25.2.17 (August 2025) Enterprise​

Improvements and Issues Fixed​

General Updates​

25.2.16 (July 2025) Enterprise​

Improvements and Issues Fixed​

General Updates​

APP​

25.2.15 (June 2025) Enterprise​

Improvements and Issues Fixed​

General Updates​

APP​

SQL​

25.2.14 (June 2025) Enterprise​

Improvements and Issues Fixed​

General Updates​

APP​

SQL​

25.2.12 (May 2025) Enterprise​

Improvements and Issues Fixed​

General Updates​

25.2.11 (May 2025) Enterprise​

Improvements and Issues Fixed​

General Updates​

SQL​

25.2.10 (May 2025) Enterprise​

Improvements and Issues Fixed​

General Updates​

SQL​

25.2.9 (April 2025) Enterprise​

Improvements and Issues Fixed​

SQL​

25.2.8 (April 2025) Enterprise​

Improvements and Issues Fixed​

General Updates​

APP​

SQL​

25.2.7 (April 2025) Enterprise​

Improvements and Issues Fixed​

General Updates​

APP​

SQL​

25.2.6 (March 2025)​

Improvements and Issues Fixed​

General Updates​

SQL​

25.2.5 (March 2025)​

What's New​

APP​

Improvements and Issues Fixed​

General Updates​

SQL​

25.2.4 (March 2025)​

Improvements and Issues Fixed​

General Updates​

SQL​

25.2.3 (January 2025)​

Improvements and Issues Fixed​

General Updates​

SQL​

25.2.2 (December 2024)​

Improvements and Issues Fixed​

General Updates​

API​

APP​

SQL​

25.2.1 (November 2024)​

Improvements and Issues Fixed​

General Updates​

APP​

SQL​

25.2.0 (October 2024)​

What's New​

Improvements and Issues Fixed​

General Updates​

APP​

SQL​

Known Issues​

25.1.11 (May 2025) Enterprise​

Improvements and Issues Fixed​

General Updates​

25.2.17 (August 2025) Enterprise

Improvements and Issues Fixed

General Updates

25.2.16 (July 2025) Enterprise

Improvements and Issues Fixed

General Updates

APP

25.2.15 (June 2025) Enterprise

Improvements and Issues Fixed

General Updates

APP

SQL

25.2.14 (June 2025) Enterprise

Improvements and Issues Fixed

General Updates

APP

SQL

25.2.12 (May 2025) Enterprise

Improvements and Issues Fixed

General Updates

25.2.11 (May 2025) Enterprise

Improvements and Issues Fixed

General Updates

SQL

25.2.10 (May 2025) Enterprise

Improvements and Issues Fixed

General Updates

SQL

25.2.9 (April 2025) Enterprise

Improvements and Issues Fixed

SQL

25.2.8 (April 2025) Enterprise

Improvements and Issues Fixed

General Updates

APP

SQL

25.2.7 (April 2025) Enterprise

Improvements and Issues Fixed

General Updates

APP

SQL

25.2.6 (March 2025)

Improvements and Issues Fixed

General Updates

SQL

25.2.5 (March 2025)

What's New

APP

Improvements and Issues Fixed

General Updates

SQL

25.2.4 (March 2025)

Improvements and Issues Fixed

General Updates

SQL

25.2.3 (January 2025)

Improvements and Issues Fixed

General Updates

SQL

25.2.2 (December 2024)

Improvements and Issues Fixed

General Updates

API

APP

SQL

25.2.1 (November 2024)

Improvements and Issues Fixed

General Updates

APP

SQL

25.2.0 (October 2024)

What's New

Improvements and Issues Fixed

General Updates

APP

SQL

Known Issues

25.1.11 (May 2025) Enterprise

Improvements and Issues Fixed

General Updates