Enhancement: Extended a rewrite to allow merging derived tables with json functions.

Enhancement: Changed the default blob cache size to 75% of the total disk for small disk config.

Enhancement: Enabled rewriting correlated subselects that depend on more than one outer table with conditions other than equality.

Enhancement: Prevented the destination table from being replaced by projection on update or delete.

Enhancement: Renamed GIN index to Multi-Value Hash Index. GIN keyword deprecated.

Bugfix: Fixed a bug that caused filter-aware optimizations to not be applied above MCTE when involved in hash joins.

Bugfix: Fixed a bug that occurred when CTEs are rewritten.

Enhancement: Enable the use of the MATCH_ANY tokenizer option with underscores in GIN index settings.

Enhancement: Added support for parameterized IN-lists in BSON GIN index optimization enabling improved performance for queries with same-type constant literals and one-argument built-in expressions. Previously limited to hex literals.

Enhancement: New variables (Note, these should only be set with guidance from SingleStore):

• repl_page_desc_limit_before_stall : limits the number of page descriptors in the page map that a 'ReplLog' can use before stalling new txs. See 'ReplLog::StallForPageMap'. The default 256K page desciptor limit means the hash table will not have load greater than 4.

• repl_io_buffer_limit: limits the number of IO buffers that a 'ReplLog' can use before stalling new txs. See 'ReplLog::StallForPageMap'. 128 IO buffers is 16MB since each IO buffer is 128K.

• [dr_]repl_network_buffer_size: replication tries to set both send and receive buffer sizes to reduce waits on TCP ack packets. 8MB is a sane battle-tested value. Can be set for both DR and non-DR replicas.

• [dr_]repl_max_chunk_size: when sending logs or snapshots to a replica limits chunk size to this value. Too long of a chunk increases the chance of timeout waiting for the replica's response packet (since the replica must process the entire chunk before acking). This defaults to 8MB - a sane limit chunk size to this value. Maximum value is 1GB and it must be divisible by 128kb so it is a multiple of io buffer size. Can be set for both dr and non-DR replicas.

BugFix: Fixed resource pool and workload management CPU limiting.

BugFix: Fixed an isue to use full table scan instead of vector index scan if enough rows are not produced.

BugFix: Fixed a wrong results bug in JSON_TO_ARRAY() join queries where the quotes on strings were incorrectly removed.

BugFix: Fixed a rare deadlock involving temp tables.

Enhancement: Added more metrics to the views, MV_CLOUD_PER_COMPUTE_REMOTE_STATS and MV_CLOUD_PER_STORAGE_REMOTE_STATS, for tracking of retention log chunks and snapshots.

Enhancement: Added support for stopwords token_filter for custom analyzers for FTS VERSION 2.

BugFix: Fixed invalid optree from rewrite on union queries matching a very specific shape.

Enhancement: Added estimates for query memory usage based on static row count and row size estimates to improve Workload Manager (WM) memory management.

Enhancement: Added support to the GIN Index for BSON for expressions, built-in functions, user-defined variables (UDVs), and typecasting. User-defined functions (UDFs) and non-deterministic built-in functions, such as rand(), remain unsupported.

Bugfix: Fixed an issue that could lead to undefined behavior when a node failed concurrently with the computation of the replication distribution tree.

Bugfix: Fixed a NULL value inline bug by adding typecast operations above the referencing field.

Bugfix: Fixed an issue where a node that had not been upgraded could trigger undefined behavior if the node's processlist was queried while the node was processing an internal RPC.

Enhancement: Added a KILL option for the DETACH DATABASE command.

Enhancement: Improved optimization speed of parameterized IN-lists by limiting traversal depth.

Enhancement: Added support for delimited batch sets in external functions.

Enhancement: High Availability for the Master Aggregator (HA for MA) is now enabled exclusively for Enterprise edition.

Enhancement: OPTIMIZE TABLE ... INDEX is now more responsive to KILL QUERY statements.

Bugfix: Fixed a bug that caused DROP DATABASE to hang in a rare condition.

Bugfix: Fixed an issue that returned wrong results in pipelines in a rare race condition.

Bugfix: Fixed an issue that caused a crash when a query referenced too many tables.

Bugfix: Changed options for loading libpam.so.

Bugfix: Fixed a race condition that caused DETACH DATABASE to hang.

Bugfix: Fixed a buffer overflow issue that occurred while de-parameterizing a multi-column IN-list filter.

Bugfix: Fixed an issue to prevent LRU eviction from stalling when several table modules are stale.

Bugfix: Fixed a bug in JSON_TO_ARRAY() join pushdown optimization that occurred when the JSON value being extracted from table_col is a JSON array.

Enhancement: General improvements and optimizations for CHECK BOTTOMLESS CHECKSUM command.

Enhancement: Added support for JSON arrays in pipelines loading JSON files. Each JSON record in the array is loaded as a separate row.

Bugfix: Fixed ALTER RESOURCE POOL to respect queue depth constraints.

Bugfix: Fixed a bug that produced incorrect results when performing a hash join with a condition that compares mismatched types where one of the types is BSON.

Bugfix: Fixed a crash caused by libgcc btree bug.

Bugfix: Reduced contention on a global lock controlling modules, affecting code loading and unwinding of exceptions.

Bugfix: Removed garbage collection from cleaning up arrangements when such garbage collection is already in process.

Bugfix: Fixed an issue impacting creating or altering a resource pool with a CPU percentage limitation after a MA failover.

Bugfix: Fixed CTE subselect to join preprocessing in the INTERSECT/EXCEPT CTE case.

Enhancement: Added an engine variable optimizer_disable_subselect_to_join_cte_preprocess which can be used to disable the subselect to join rewrite for CTE preprocessing before inlining or materialization.

Bugfix: Reserved memory space for segment_id in the pseudo column's MemoryFile.

Bugfix: Fixed a bug that occurred when a query used I0 as a column name.

Bugfix: Fixed a crash that was due to an issue with the rewrite that merges union queries.

Enhancement: Added an engine variable optimizer_enable_merge_unioned_queries_rewrite which can be used to enable or disable the rewrite that merges union queries. This variable is ON by default.

Enhancement: Added support for the LIMIT clause in prepared statements.

Enhancement: Added an option to run queries that failed asynchronous compilation, allowing users to introspect the compilation results.

Bugfix: Fixed an issue to prevent a crash when JSON_TO_ARRAY optimization is run against non-nullable JSON columns.

Enhancement: Added aggregator activity stats in Query_completion event tracing. Refer to Query History for details.

Enhancement: Added the ability for a user to change the login password when the variable password_expiration_mode is set to LIMITED_ACCESS. Now the user is allowed to login even after the password expires but can only execute commands that update the password such as ALTER USER or SET PASSWORD.

Enhancement: Added a password expiry warning message that is raised each time the user executes a query. This warning starts appearing 14 days before the password actually expires.

Enhancement: Added auditlogging mode for only the root user. It is a startup-only variable similar to other audit logging configuration variables and should be set along with the auditlog_level.

Bugfix: Fixed a bug that caused a node to crash when the variable ignore_foreign_keys is ON and the ALTER TABLE command is used to add a foreign key.

Bugfix: Changed the output projection DDL to CREATE PROJECTION  instead of CREATE TABLE _$_table_name_$ _ in debug profile.

Bugfix: Fixed an issue where DDL statements that were concurrent with PROMOTE AGGREGATOR TO MASTER did not get forwarded to the new Master Aggregator.

Bugfix: Fixed a bug to prevent a crash when using FTS v2 with CTE.

Bugfix: Fixed a bug that caused incorrect results when running INFER PIPELINE CSV.

Bugfix: Fixed a rare deadlock occurring when DETACH DATABASE is run.

Enhancement: Added an engine variable disk_plan_gc_pause_seconds_on_startup that disables disk plan garbage collection on startup. This variable prevents hot plans from being unintentionally disk garbage collected.

Enhancement: Added an internal allocator Alloc_connection_context which tracks certain per-connection allocations that were previously tracked using the standard allocator.

Bugfix: Fixed a crash that occurred when aggregator functions are used with VECTOR type data inside other built-ins.

Bugfix: Fixed the userDictionary parameter for the korean full-text tokenizer.

Enhancement: Added a vector index cache to limit the amount of memory used by vector indexes. Refer to Vector Indexing for details.

Enhancement: Extended the VECTOR_SUM aggregate function to support the VECTOR data type.

Enhancement: Computed column definitions now support the SPLIT function.

Enhancement: The DROP and ALTER TABLE commands no longer have to wait for the plan garbage collector.

Bugfix: Fixed a crash occurring when a table-valued function (TVF) column is used in a WHERE clause without a wrapping JSON_EXTRACT function in a TABLE(JSON_TO_ARRAY()) join.

Bugfix: Fixed a bug that caused CDC-in pipelines to fail while inferring the table schema, with the "Failed to allocate slot in the extractor pool" error.

Bugfix: Fixed a deadlock between ALTER and failover in a rare race condition.

Bugfix: Fixed a critical issue where clusters were failing to connect to AWS remote storage due to CURL request timeouts.

Bugfix: Fixed a bug where a CDC pipeline gets stuck while waiting for data.

Bugfix: Fixed a bug that prevented proper error handling on socket timeout.

Bugfix: Fixed a bug in JSON_ARRAY_CONTAINS_STRING query rewrite for query shapes with the LIMIT clause.

Bugfix: Fixed support for plan pinning in IN list factorization.

Enhancement: Improved pipeline error clearing. Additional errors are cleared when CLEAR PIPELINES ERRORS is run or when the pipelines_errors_retention_minutes limit is reached.

Enhancement: Added a new engine variable scheduler_slow_threshold_seconds that specifies the threshold for triggering the verbose logging of scheduler thread timing.

Enhancement: Added a new engine variable scheduler_slow_ready_queue_seconds that specifies the threshold for triggering logging of slow ready queue draining.

Bugfix: Fixed network connectivity performance issues impacting BYOC clusters communicating with the remote storage.

Bugfix: Fixed a bug in lateral join to preserve projection field aliases for lateral join subselects.

Enhancement: Improve behavior of garbage collection for plancache.

Bugfix: Fixed a bug caused by using a (cross-segment) vector index (Vector Indexing) with null vectors. Users on prior 8.9 versions will need to recreate (drop and add) vector indexes for this fix to be effective as the cross-segment indexes are built in the background.

Bugfix: Fixes a data-dependent crash condition occurring in certain TABLE(JSON_TO_ARRAY(... joins introduced in version 8.9.

Enhancement: Added new nori (Korean) analyzer customizations for Full-Text Search V2.

Enhancement: Added support for updated Standard and Enterprise licenses.

Enhancement: Added logging for LRU compiled unit eviction.

Enhancement: Fixed out of memory (OOM) errors and extra memory usage in Iceberg ingest. Introduced global engine variable pipelines_iceberg_data_workers_heap_size to control memory consumption on leaves.

Enhancement: Introduced new JSON_BUILD_ARRAY function.

Enhancement: Introduced support for placeholders for partition ID and timestamp in the SELECT INTO ... file name command.

Bugfix: Fixed a bug causing accumulation of .rem files on disk.

Bugfix: Fixed a small memory bug in columnstore scans that use the JSON_TO_ARRAY join optimization.

Bugfix: Fixed a crash in JSON_EXTRACT_STRING.

Bugfix: Fixed a bug with updates and asserts using JSON_ARRAY_CONTAINS_<type> predicates.

Bugfix: Fixed bottomless upload throttling criteria.

Bugfix: Blocked creation of temporary table as a shallow copy.

Bugfix: Resolved an issue where an in-development subsystem can leak files on disk

Enhancement: Added Korean language analyzer for full-text search V2.

Enhancement: Added support to infer CSV files with a single column when the file contains no field terminators in any record.

Enhancement: Relaxed dependency on partition count of leaf nodes for leaf plans.

Bugfix: Fixed handling of heartbeat messages in the MongoDB® extractor in debug mode.

Bugfix: Fixed display of default BSON and string values with null-terminators in the information schema.

Bugfix: Removed trailing dot for decimal column types that have scale equal to 0.

Bugfix: Fixed IN-list index matching for columnstore tables when a query has multiple IN-list predicates.

Bugfix: Fixed a bug that caused an invalid optree error after the JsonArrayContainsToTableBuiltin rewrite.

Bugfix: Fixed a crash that occurred during spilling when executing a query with a large number of GROUP BY columns.

Bugfix: Fixed performance regression in Vector Search when using DOT_PRODUCT metric.

Bugfix: Added an optional 'swap_time' argument to UUID_TO_BIN and BIN_TO_UUID functions.

Bugfix: Allowed cached table memory to be freed for empty tables in replica databases.

Bugfix: Fixed a lateral join parsing bug.