ApsaraDB RDS:Release notes for AliSQL

• New features:
  • Version 5.1 of Ganos is supported. For more information, see Release notes for Ganos.
  • The Transparent Data Encryption (TDE) feature is supported for tables.
  • Version 1.0 of the rds_tde_utils extension is supported.
  • Version 4.1 of the pg_profile extension is supported.
  • Version 2.2.1 of the pg_stat_kcache extension is supported.
  • Version 1.1 of the mysql_fdw extension is supported.
  • Version 1.4.7 of the pg_repack extension is supported.
  • Version 1.0 of the zhparser extension is supported.
  • Version 1.3 of the rum extension is supported.
  • Version 2.3.15 of the plv8 extension is supported.
  • Version 1.4.0 of the pg_hint_plan extension is supported.
  • Version 2.0.3 of the tds_fdw extension is supported.
• Bug fixes:

  None.

• New features:
  • Version 1.1.1 of the EncDB extension is supported.
  • Version 1.1 of the oss_fdw extension is supported.
  • Version 2.5.0 of the TimescaleDB extension is supported.
  • The memory usage of the index_adviser extension is optimized.
• Bug fixes:

  The bug due to which the index_adviser extension accesses memory out of bounds in complex queries is fixed.

• New features:
  • Version 4.9 of Ganos is supported. For more information, see Release notes for Ganos.
    • The ST_Intersection aggregate function is supported. This function is used to aggregate an array of geometry objects.
    • The ST_AddZ function is supported. This function accepts z-axis values as the value of an input parameter and is used to convert a 2D or 3DM geometry to a 3D or 4D geometry.
    • The ST_SetValue function is enhanced to support the settings of pixel values based on the spatial range of a geometry object.
    • The S​T_ExportTo function is enhanced to export raster objects as COG files.
    • The ST_CreateRast function is enhanced to convert multiple raster records or arrays into raster objects.
    • The ST_Split function is enhanced to support the settings of the start time when you want to split a trajectory by time. The enhanced function also supports the splitting of a trajectory by trajectory point index.
    • The ST_Union function is enhanced to support batch execution based on memory usage to prevent out-of-memory (OOM) errors caused by large data volumes.
    • HDFS-based operations on raster data are supported.
  • The pg_jieba extension that is used to segment Chinese text is supported. The extension supports custom dictionaries and allows you to switch between dictionaries. The extension displays segmentation results based on the offset of each field.
• Bug fixes:

  The bug due to which the index_adviser extension fails to respond when all recommended indexes already exist is fixed.

• New features:
  Version 4.7 of Ganos is supported. For more information, see Release notes for Ganos.

  • The ST_makeTrajectory function is enhanced to convert rows in a table into a trajectory.
  • The ST_AsTable function is added to convert trajectories into tables.
• Bug fixes:

  The bug of silent corruption of indexes caused by "CREATE INDEX CONCURRENTLY" / "REINDEX CONCURRENTLY" is fixed.

• New features:
  • Version 1.0.2 of the sequential-uuids extension is supported.
  • Version 1.1.9 of the EncDB extension is supported.
  • Version 4.6 of Ganos is supported. For more information, see Release notes for Ganos.
    • Raster data can be accessed by using self-managed MinIO servers. For more information, see Object storage paths.
    • The ST_PointValues raster function is added. This function is used to return the pixel values of all bands.
  • Standard accounts are granted the permissions to execute the LOAD statement to load the index_adviser and pg_hint_plan extensions.
  • Privileged accounts are granted the permissions to configure the BYPASSRLS parameter in the CREATE ROLE statement.
• Bug fixes:

  The bug that causes missing parameter values in slow SQL logs is fixed.

• New features:
  • Version 5.1 of Ganos is supported. For more information, see Release notes for Ganos.
  • The TDE feature is supported for tables.
  • Version 1.0 of the rds_tde_utils extension is supported.
  • Version 4.1 of the pg_profile extension is supported.
  • Version 2.2.1 of the pg_stat_kcache extension is supported.
  • Version 2.0.3 of the tds_fdw extension is supported.
• Bug fixes:

  None.

• New features:
  • Version 1.1.1 of the EncDB extension is supported.
  • The memory usage of the index_adviser extension is optimized.
• Bug fixes:

  The bug due to which the index_adviser extension accesses memory out of bounds in complex queries is fixed.

• New features:
  • Version 4.9 of Ganos is supported. For more information, see Release notes for Ganos.
    • The ST_Intersection aggregate function is supported. This function is used to aggregate an array of geometry objects.
    • The ST_AddZ function is supported. This function accepts z-axis values as the value of an input parameter and is used to convert a 2D or 3DM geometry to a 3D or 4D geometry.
    • The ST_SetValue function is enhanced to support the settings of pixel values based on the spatial range of a geometry object.
    • The S​T_ExportTo function is enhanced to export raster objects as COG files.
    • The ST_CreateRast function is enhanced to convert multiple raster records or arrays into raster objects.
    • The ST_Split function is enhanced to support the settings of the start time when you want to split a trajectory by time. The enhanced function also supports the splitting of a trajectory by trajectory point index.
    • The ST_Union function is enhanced to support batch execution based on memory usage to prevent out-of-memory (OOM) errors caused by large data volumes.
    • HDFS-based operations on raster data are supported.
  • The pg_jieba extension that is used to segment Chinese words is supported. The extension supports custom dictionaries and allows you to switch between dictionaries. The extension displays segmentation results based on the offset of each field.
• Bug fixes:

  The bug due to which the index_adviser extension fails to respond when all recommended indexes already exist is fixed.

• New features:
  • Version 1.0.2 of the sequential-uuids extension is supported.
  • Version 1.1.9 of the EncDB extension is supported.
  • Version 4.6 of Ganos is supported. For more information, see Release notes for Ganos.
    • Raster data can be accessed by using self-managed MinIO servers. For more information, see Object storage paths.
    • The ST_PointValues raster function is added. This function is used to return the pixel values of all bands.
  • Standard accounts are granted the permissions to execute the LOAD statement to load the index_adviser and pg_hint_plan extensions.
  • Privileged accounts are granted the permissions to configure the BYPASSRLS parameter in the CREATE ROLE statement.
• Bug fixes:

  The bug that causes missing parameter values in slow SQL logs is fixed.

• New features:
  • Version 4.4 of Ganos is supported. For more information, see Release notes for Ganos.
  • Version 3.1.4 of PostGIS is supported.
  • The pg_jieba extension is supported. This extension is used for Chinese tokenization.
  • The pldebugger extension is supported. This extension is used to debug stored procedures.
  • Version 2.5.0 of the TimescaleDB extension is supported.
  • The log_statement parameter can be set for a session, a user, or a database.
• Bug fixes:
  • The bug due to which privileged accounts do not have permissions to execute the SHOW SHARED_PRELOAD_LIBRARIES statement is fixed.
  • The bug due to which standard accounts do not have the permissions to call the pg_stat_reset() function is fixed.

• New features:

  The fully encrypted database feature can identify the versions of the EncDB SDK and EncJDBC. For more information, see Overview.

• Performance improvements:
  • The audit log feature is optimized. After the optimization, the audit log feature is enabled by default.
  • Ganos is optimized. After the optimization, the extensions of Ganos can be identified based on their descriptions and can be updated. For more information, see How do I update the plug-ins of Ganos?.
• Bug fixes:

  The bug due to which the extensions of Ganos report errors when functions are invoked is fixed. This bug is triggered if the extensions of Ganos are not updated at the earliest opportunity.

• New features:
  • Version 4.1 of Ganos is supported. In version 4.1, some functions are added, and some functions are enhanced. For more information, see Release notes for Ganos.
  • The rdsutils extension is provided. This extension is a proprietary extension of Alibaba Cloud and provides the failove_slots view.
  • Version 1.3.8 of the RUM extension is supported.
  • Version 2.4.0 of the pglogical extension is supported.
  • Version 2.3.15 of the PLV8 extension is supported.
• Performance improvements:
  • GCC is updated to version 9.2, and glibc is updated to version 2.30. After the updates, LTO is supported. If LTO is enabled, the overall performance can be improved by 5%.
  • The audit log feature is optimized. If the log_statement parameter is set to all, database performance can be improved by approximately four times in scenarios in which more than 50 active connections are established.
  • The default value of the rds_failover_slot_mode parameter is changed to async. This default value specifies that the Logical Replication Slot Failover feature is enabled. For more information, see Logical Replication Slot Failover.
• Bug fixes:
  • The bug due to which the mysql_fdw extension causes memory leaks in some scenarios is fixed.
  • The bug due to which the pg_cron extension causes memory leaks in some scenarios is fixed.

• New features:
  • Version 3.8 of Ganos is supported.
    • The ST_AsDatasetFile function is added. This function is used to convert a specified part of a raster into a BYTEA-type file.
    • The ST_RasterDrivers function is added. This function is used to query all drivers that are supported by raster data sources in Ganos.
    • The bug due to which the ST_Clip function encounters reprojection failures when a spatial reference system is specified is fixed.
  • The pglogical extension is supported. This extension provides logical streaming replication by using a publish/subscribe pattern.
  • The pgAudit extension is supported. This extension is used to generate audit logs.
• Performance improvements:
  • Permission management is optimized. When the GRANT role1 TO role2 statement is executed, role2 does not carry over the CREATEDB or CREATEROLE permission from role1.
    Important The CREATEDB and CREATEROLE permissions are removed from the roles to which the GRANT statement is executed to grant these permissions.
  • Privileged accounts are granted the permissions to call the pg_ls_waldir() function.
  • The scanning method that is used by the monitoring and alerting feature is optimized to improve CPU performance.
  • The major version upgrade feature is optimized. For more information, see Upgrade the major engine version of an ApsaraDB RDS for PostgreSQL instance. This feature can be used to update extensions such as postgis and pgRouting with no downtime. This feature can also be used to update account permissions from PostgreSQL 9.4 to a later version with no downtime.
  • The maximum length per log record is increased from 1,024 bytes to 4,096 bytes when SQL statements cause insufficient memory or unexpected exits.
• Bug fixes:

  The bug due to which the oss_fdw extension accesses memory out of bounds in some scenarios is fixed.

• New features:
  • Version 3.7 of Ganos is supported.
  • The pg_repack extension is supported. This extension is used to clear tablespaces and mitigate table bloats.
  • Version 1.1 of the mysql_fdw extension is supported.
  • The major version upgrade feature is provided to migrate the user permissions, the mysql_fdw and oss_fdw extensions, and the permissions on these extensions with no downtime. For more information, see Upgrade the major engine version of an ApsaraDB RDS for PostgreSQL instance.
• Bug fixes:

  The bug due to which the oss_fdw extension cannot be used after a minor engine version update or a major engine version upgrade is fixed.

• New features:
  • Version 3.6 of Ganos is supported.
  • The decoderbufs extension is supported. This extension is used to generate data that is compatible with the Debezium platform based on Protocol Buffers.
  • The pg_pathman extension is supported. This extension is used to improve the performance of partitioned tables.
  • The PLV8 extension is supported. This extension is a trusted JavaScript extension.
  • The oss_fdw extension is supported. This extension is used to read and write data to OSS buckets.
  • The mysql_fdw extension is supported. This extension is used to read and write data to ApsaraDB RDS for MySQL instances or self-managed MySQL databases.
  • Privileged accounts are granted the permissions to create event triggers and specify the maximum length per log record.
• Bug fixes:
  • The bug due to which ApsaraDB RDS cannot display slow query logs in an expected manner is fixed.
  • The bug due to which privileged accounts cannot use the zhparser extension to customize word libraries is fixed.
  • The bug that triggers log-related online alerts if the archive_mode parameter is set to on is fixed.

• New features:
  • Indexes can be deleted in parallel.
  • More types of data from different data sources are supported.
  • An enhanced partitioning feature is provided. This feature can directly join partitioned tables to reduce the overall amount of time that is required to run a query. In addition, this feature supports row-level BEFORE triggers and full logical replications.
  • An advanced hash aggregation feature is released. This feature is used to aggregate and group various types of data. This way, a query that requires ApsaraDB RDS to aggregate a large amount of data does not need to run only in the memory.
  • The Logical Replication Slot Failover feature is supported. For more information, see Logical Replication Slot Failover.
• Performance improvements:

  The indexing and search features are optimized to adapt to large database systems.

For more information about PostgreSQL 13, see the PostgreSQL official documentation.

• New features:
  • Version 5.1 of Ganos is supported. For more information, see Release notes for Ganos.
  • The Transparent Data Encryption (TDE) feature is supported to implement TDE for tables.
  • Version 1.0 of the rds_tde_utils extension is supported.
  • Version 4.1 of the pg_profile extension is supported.
  • Version 2.2.1 of the pg_stat_kcache extension is supported.
• Bug fixes:

  None.

• New features:
  • Version 1.1.1 of the EncDB extension is supported.
  • The memory usage of the index_adviser extension is optimized.
• Bug fixes:

  The bug due to which the index_adviser extension accesses memory out of bounds in complex queries is fixed.

• New features:
  • Version 4.9 of Ganos is supported. For more information, see Release notes for Ganos.
    • The ST_Intersection aggregate function is supported. This function is used to aggregate an array of geometry objects.
    • The ST_AddZ function is supported. This function accepts z-axis values as the value of an input parameter and is used to convert a 2D or 3DM geometry to a 3D or 4D geometry.
    • The ST_SetValue function is enhanced to support the settings of pixel values based on the spatial range of a geometry object.
    • The S​T_ExportTo function is enhanced to export raster objects as COG files.
    • The ST_CreateRast function is enhanced to convert multiple raster records or arrays into raster objects.
    • The ST_Split function is enhanced to support the settings of the start time when you want to split a trajectory by time. The enhanced function also supports the splitting of a trajectory by trajectory point index.
    • The ST_Union function is enhanced to support batch execution based on memory usage to prevent out-of-memory (OOM) errors caused by large data volumes.
    • HDFS-based operations on raster data are supported.
  • The pg_jieba extension that is used to segment Chinese words is supported. The extension supports custom dictionaries and allows you to switch between dictionaries. The extension displays segmentation results based on the offset of each field.
• Bug fixes:

  The bug due to which the index_adviser extension fails to respond when all recommended indexes already exist is fixed.

• New features:
  • Version 1.0.2 of the sequential-uuids extension is supported.
  • Version 1.18.0 of the MADlib extension is supported.
  • Version 1.1.9 of the EncDB extension is supported.
  • Version 4.6 of Ganos is supported. For more information, see Release notes for Ganos.
    • Raster data can be accessed by using self-managed MinIO servers. For more information, see Object storage paths.
    • The ST_PointValues raster function is added. This function is used to return the pixel values of all bands.
  • Standard accounts are granted the permissions to execute the LOAD statement to load the index_adviser and pg_hint_plan extensions.
  • Privileged accounts are granted the permissions to configure the BYPASSRLS parameter in the CREATE ROLE statement.
• Bug fixes:

  The bug that causes missing parameter values in slow SQL logs is fixed.

• New features:
  • Version 4.4 of Ganos is supported. For more information, see Release notes for Ganos.
  • Version 3.1.4 of PostGIS is supported.
  • The pg_jieba extension is supported. This extension is used for Chinese tokenization.
  • The pldebugger extension is supported. This extension is used to debug stored procedures.
  • The log_statement parameter can be configured for a session, a user, or a database.
• Bug fixes:
  • The bug due to which the pg_cron extension causes memory leaks when users view the task records in the cron.job_log data table is fixed.
  • The bug due to which privileged accounts do not have permissions to execute the SHOW SHARED_PRELOAD_LIBRARIES statement is fixed.
  • The bug due to which standard accounts do not have the permissions to call the pg_stat_reset() function is fixed.

• New features:

  The fully encrypted database feature can identify the versions of the EncDB SDK and EncJDBC. For more information, see Overview.

• Performance improvements:
  • The audit log feature is optimized. After the optimization, the audit log feature is enabled by default.
  • Ganos is optimized. After the optimization, the extensions of Ganos can be identified based on their descriptions and can be updated. For more information, see How do I update the plug-ins of Ganos?.
• Bug fixes:

  The bug due to which the extensions of Ganos report errors when functions are invoked is fixed. This bug is triggered if the extensions of Ganos are not updated at the earliest opportunity.

• New features:
  • Version 4.1 of Ganos is supported. In version 4.1, some functions are added, and some functions are enhanced. For more information, see Release notes for Ganos.
  • The rdsutils extension is provided. This extension is a proprietary extension of Alibaba Cloud and provides the failove_slots view.
  • Version 1.3.8 of the RUM extension is supported.
  • Version 1.5.12 of the pg_pathman extension is supported.
  • Version 2.4.0 of the pglogical extension is supported.
  • Version 2.3.15 of the PLV8 extension is supported.
  • Version 2020_09_05 of the RDKit extension is supported.
• Performance improvements:
  • GCC is updated to version 9.2, and glibc is updated to version 2.30. After the updates, LTO is supported. If LTO is enabled, the overall performance can be improved by 5%.
  • The audit log feature is optimized. If the log_statement parameter is set to all, database performance can be improved by approximately four times in scenarios in which more than 50 active connections are established.
  • The default value of the rds_failover_slot_mode parameter is changed to async. This default value specifies that the Logical Replication Slot Failover feature is enabled. For more information, see Logical Replication Slot Failover.
• Bug fixes:
  • The bug due to which TimescaleDB loses the metadata of system tables after the VACUUM FULL pg_catalog.pg_attribute statement is executed is fixed.
  • The bug due to which the mysql_fdw extension causes memory leaks in some scenarios is fixed.
  • The bug due to which the pg_cron extension causes memory leaks in some scenarios is fixed.

• New features:
  • Version 3.8 of Ganos is supported.
    • The ST_AsDatasetFile function is added. This function is used to convert a specified part of a raster into a BYTEA-type file.
    • The ST_RasterDrivers function is added. This function is used to query all drivers that are supported by raster data sources in Ganos.
    • The bug due to which the ST_Clip function encounters reprojection failures when a spatial reference system is specified is fixed.
  • The pglogical extension is supported. This extension provides logical streaming replication by using a publish/subscribe pattern.
  • The pgAudit extension is supported. This extension is used to generate audit logs.
• Performance improvements:
  • Permission management is optimized. When the GRANT role1 TO role2 statement is executed, role2 does not carry over the CREATEDB or CREATEROLE permission from role1.
    Important The CREATEDB and CREATEROLE permissions are removed from the roles to which the GRANT statement is executed to grant these permissions.
  • Privileged accounts are granted the permissions to use the pg_ls_waldir() function.
  • The scanning method that is used by the monitoring and alerting feature is optimized to improve CPU performance.
  • The major version upgrade feature is optimized. For more information, see Upgrade the major engine version of an ApsaraDB RDS for PostgreSQL instance. This feature can be used to update extensions such as postgis and pgRouting with no downtime. This feature can also be used to update account permissions from PostgreSQL 9.4 to a later version with no downtime.
  • The maximum length per log record is increased from 1,024 bytes to 4,096 bytes when SQL statements cause insufficient memory or unexpected exits.
• Bug fixes:

  The bug due to which the oss_fdw extension accesses memory out of bounds in some scenarios is fixed.

• New features:
  • Version 3.7 of Ganos is supported.
  • The pg_repack extension is supported. This extension is used to clear tablespaces and mitigate table bloats.
  • Version 1.1 of the mysql_fdw extension is supported.
  • The major version upgrade feature is provided to migrate the user permissions, the mysql_fdw and oss_fdw extensions, and the permissions on these extensions with no downtime. For more information, see Upgrade the major engine version of an ApsaraDB RDS for PostgreSQL instance.
• Bug fixes:

  The bug due to which the oss_fdw extension cannot be used after a minor engine version update or a major engine version upgrade is fixed.

• New features:
  • Version 3.6 of Ganos is supported.
  • The decoderbufs extension is supported. This extension is used to generate data that is compatible with the Debezium platform based on Protocol Buffers.
  • The pg_pathman extension is supported. This extension is used to improve the performance of partitioned tables.
  • The PLV8 extension is supported. This extension is a trusted JavaScript extension.
  • The oss_fdw extension is supported. This extension is used to read data from and write data to OSS buckets.
• Bug fixes:
  • The bug due to which privileged accounts cannot use the zhparser extension to customize word libraries is fixed.
  • The bug that triggers log-related online alerts if the archive_mode parameter is set to on is fixed.

• New features:
  • Version 3.3 of Ganos is supported.
  • The pg_hint_plan extension is supported. This extension is used to add hints, which are used to change the query plans that are provided.
  • The zhparser extension is supported.
  • The RUM extension is supported. This extension is used to run full-text searches at high speeds.
  • The Bloom extension is supported.
  • The Logical Replication Slot Failover feature is supported.
• Bug fixes:

  The bug that is caused by the conflict between the tds_fdw extension and the plan cache is fixed.

• New features:
  • Privileged accounts are granted the permissions to create accounts that have the REPLICATION permission on data streams.
  • Privileged accounts are granted the permissions to create event triggers.
  • The rds_auditlog_max_query_length parameter is added. This parameter specifies the maximum length per audit log record.
  • An updated pg_cron extension is provided. After the update, this extension can be used to create and run cross-instance tasks. In addition, this extension provides a data table named cron.job_log from which users can view task records.
  • The pg_freespacemap extension is supported.
  • Spatio-temporal memory topology indexes are supported by Ganos.
  • Version 3.2 of Ganos is supported.
• Bug fixes:
  • The bug due to which DTS reports check errors when more than one child transaction is started or committed during data migration is fixed.
  • The CVE-2020-14349 vulnerability is fixed. This vulnerability prevents ApsaraDB RDS from cleaning search paths in an expected manner during logical replications.
  • The CVE-2020-14350 vulnerability is fixed. This vulnerability allows the CREATE EXTENSION statement to contain uncontrolled search path elements.
  • The CVE-2020-25695 vulnerability is fixed. Attackers can exploit this vulnerability to create permanent objects and call all SQL functions by using the credentials of a superuser account.

• New features:
  • Version 3.0 of Ganos is supported.
  • The sql_firewall extension is supported. This extension is used to prevent malicious injection of SQL statements.
  • The pg_bigm extension is supported. This extension is used to support fuzzy match.
• Bug fixes:
  • The bug due to which the backend cannot identify the rds_ prefix in parameters is fixed.
  • The bug due to which the pg_cron extension cannot be installed or used in an expected manner is fixed.
  • The bug due to which the RDKit extension cannot be loaded when dependencies are not provided is fixed.

• New features:
  • Version 2.7 of Ganos is supported.
  • Version 2.14 of the hll extension is supported.
  • Version 2.9.0 of the PL/Proxy extension is supported.
  • Version 1.0 of the tsm_system_rows extension is supported.
  • Version 1.0 of the tsm_system_time extension is supported.
  • Version 1.0 of the smlar extension is supported.
  • Version 1.0 of the tds_fdw extension is supported.
• Bug fixes:

  The bug due to which RDS instances restart when logical subscriptions time out is fixed.

• New features:
  • A specified number of connections can be reserved for the rds_superuser role. If users assume this role, they can log on to an RDS instance to troubleshoot issues even if the number of established connections to the RDS instance reaches the upper limit.
  • The wal2json extension is supported.
  • Version 2.6 of Ganos is supported.
• Bug fixes:

  Some permission-related bugs are fixed.

New features:

• The pg_roaringbitmap extension, RDKit extension, mysql_fdw extension, and Ganos are supported.
• Privileged accounts are granted the permissions to publish all tables at a time and create subscriptions.

• New features:
  • Version 5.1 of Ganos is supported. For more information, see Release notes for Ganos.
  • The TDE feature is supported for tables.
  • Version 1.0 of the rds_tde_utils extension is supported.
  • Version 4.1 of the pg_profile extension is supported.
  • Version 2.2.1 of the pg_stat_kcache extension is supported.
• Bug fixes:

  None.

• New features:
  • Version 1.1.1 of the EncDB extension is supported.
  • The memory usage of the index_adviser extension is optimized.
• Bug fixes:

  The bug due to which the index_adviser extension accesses memory out of bounds in complex queries is fixed.

• New features:
  • Version 4.9 of Ganos is supported. For more information, see Release notes for Ganos.
    • The ST_Intersection aggregate function is supported. This function is used to aggregate an array of geometry objects.
    • The ST_AddZ function is supported. This function accepts z-axis values as the value of an input parameter and is used to convert a 2D or 3DM geometry to a 3D or 4D geometry.
    • The ST_SetValue function is enhanced to support the settings of pixel values based on the spatial range of a geometry object.
    • The S​T_ExportTo function is enhanced to export raster objects as COG files.
    • The ST_CreateRast function is enhanced to convert multiple raster records or arrays into raster objects.
    • The ST_Split function is enhanced to support the settings of the start time when you want to split a trajectory by time. The enhanced function also supports the splitting of a trajectory by trajectory point index.
    • The ST_Union function is enhanced to support batch execution based on memory usage to prevent out-of-memory (OOM) errors caused by large data volumes.
    • HDFS-based operations on raster data are supported.
  • The pg_jieba extension that is used to segment Chinese words is supported. The extension supports custom dictionaries and allows you to switch between dictionaries. The extension displays segmentation results based on the offset of each field.
• Bug fixes:

  The bug due to which the index_adviser extension fails to respond when all recommended indexes already exist is fixed.

• New features:
  • Version 1.0.2 of the sequential-uuids extension is supported.
  • Version 1.18.0 of the MADlib extension is supported.
  • Version 1.1.9 of the EncDB extension is supported.
  • Version 4.6 of Ganos is supported. For more information, see Release notes for Ganos.
    • Raster data can be accessed by using self-managed MinIO servers. For more information, see Object storage paths.
    • The ST_PointValues raster function is added. This function is used to return the pixel values of all bands.
  • Standard accounts are granted the permissions to execute the LOAD statement to load the index_adviser and pg_hint_plan extensions.
  • Privileged accounts are granted the permissions to configure the BYPASSRLS parameter in the CREATE ROLE statement.
• Bug fixes:

  The bug that causes missing parameter values in slow SQL logs is fixed.

• New features:
  • Version 4.4 of Ganos is supported. For more information, see Release notes for Ganos.
  • Version 3.1.4 of PostGIS is supported.
  • The pg_jieba extension is supported. This extension is used for Chinese tokenization.
  • The pldebugger extension is supported. This extension is used to debug stored procedures.
  • The log_statement parameter can be configured for a session, a user, or a database.
• Bug fixes:
  • The bug due to which the pg_cron extension causes memory leaks when users view the task records in the cron.job_log data table is fixed.
  • The bug due to which privileged accounts do not have permissions to execute the SHOW SHARED_PRELOAD_LIBRARIES statement is fixed.
  • The bug due to which standard accounts do not have the permissions to call the pg_stat_reset() function is fixed.

• New features:

  The fully encrypted database feature can identify the versions of the EncDB SDK and EncJDBC. For more information, see Overview.

• Performance improvements:
  • The audit log feature is optimized. After the optimization, the audit log feature is enabled by default.
  • Ganos is optimized. After the optimization, the extensions of Ganos can be identified based on their descriptions and can be updated. For more information, see How do I update the plug-ins of Ganos?.
• Bug fixes:

  The bug due to which the extensions of Ganos report errors when functions are invoked is fixed. This bug is triggered if the extensions of Ganos are not updated at the earliest opportunity.

• New features:
  • Version 4.1 of Ganos is supported. In version 4.1, some functions are added, and some functions are enhanced. For more information, see Release notes for Ganos.
  • The rdsutils extension is provided. This extension is a proprietary extension of Alibaba Cloud and provides the failove_slots view.
  • Version 1.3.8 of the RUM extension is supported.
  • Version 1.5.12 of the pg_pathman extension is supported.
  • Version 2.4.0 of the pglogical extension is supported.
  • Version 2.3.15 of the PLV8 extension is supported.
• Performance improvements:
  • GCC is updated to version 9.2, and glibc is updated to version 2.30. After the updates, LTO is supported. If LTO is enabled, the overall performance can be improved by 5%.
  • The audit log feature is optimized. If the log_statement parameter is set to all, database performance can be improved by approximately four times in scenarios in which more than 50 active connections are established.
  • The default value of the rds_failover_slot_mode parameter is changed to async. This default value specifies that the Logical Replication Slot Failover feature is enabled. For more information, see Logical Replication Slot Failover.
  • The logging mechanism is optimized. ApsaraDB RDS no longer provides incomplete startup packet log records that are triggered by empty packets.
• Bug fixes:
  • The bug due to which the mysql_fdw extension causes memory leaks in some scenarios is fixed.
  • The bug due to which the pg_cron extension causes memory leaks in some scenarios is fixed.

• New features:
  • Version 3.8 of Ganos is supported.
    • The ST_AsDatasetFile function is added. This function is used to convert a specified part of a raster into a BYTEA-type file.
    • The ST_RasterDrivers function is added. This function is used to query all drivers that are supported by raster data sources in Ganos.
    • The bug due to which the ST_Clip function encounters reprojection failures when a spatial reference system is specified is fixed.
  • The pglogical extension is supported. This extension provides logical streaming replication by using a publish/subscribe pattern.
  • The pgAudit extension is supported. This extension is used to generate audit logs.
  • The fully encrypted database feature is supported. This feature is used to encrypt data on the user side before the data is transmitted to RDS instances. This feature helps defend against security threats inside and outside the cloud to protect user data at all times.
• Performance improvements:
  • Permission management is optimized. When the GRANT role1 TO role2 statement is executed, role2 does not carry over the CREATEDB or CREATEROLE permission from role1.
    Important The CREATEDB and CREATEROLE permissions are removed from the roles to which the GRANT statement is executed to grant these permissions.
  • Privileged accounts are granted the permissions to call the pg_ls_waldir() function.
  • The scanning method that is used by the monitoring and alerting feature is optimized to improve CPU performance.
  • The major version upgrade feature is optimized. For more information, see Upgrade the major engine version of an ApsaraDB RDS for PostgreSQL instance. This feature can be used to update extensions such as postgis and pgRouting with no downtime. This feature can also be used to update account permissions from PostgreSQL 9.4 to a later version with no downtime.
  • The maximum length per log record is increased from 1,024 bytes to 4,096 bytes when SQL statements cause insufficient memory or unexpected exits.
• Bug fixes:
  • The bug that causes the PASE extension to index data out of bounds is fixed.
  • The bug due to which the oss_fdw extension accesses memory out of bounds in some scenarios is fixed.

• New features:
  • Version 3.7 of Ganos is supported.
  • The pg_repack extension is supported. This extension is used to clear tablespaces and mitigate table bloats.
  • Version 1.1 of the mysql_fdw extension is supported.
  • The major version upgrade feature is provided to migrate the user permissions, the mysql_fdw and oss_fdw extensions, and the permissions on these extensions with no downtime. For more information, see Upgrade the major engine version of an ApsaraDB RDS for PostgreSQL instance.
• Bug fixes:

  The bug due to which the oss_fdw extension cannot be used after a minor engine version update or a major engine version upgrade is fixed.

• New features:
  • The extensions of Ganos are updated to version 3.6.
  • The mysql_fdw extension is supported. This extension is used to read data from and write data to ApsaraDB RDS for MySQL instances or self-managed MySQL databases.
• Bug fixes:

  The bug that triggers log-related online alerts if the archive_mode parameter is set to on is fixed.

• New features:
  • Version 3.3 of Ganos is supported.
  • The pg_hint_plan extension is supported. This extension is used to add hints, which are used to change the query plans that are provided.
  • The Bloom extension is supported.
• Bug fixes:
  • The bug that causes data loss in synchronous mode is fixed by optimizing the Logical Replication Slot Failover feature. This feature can help prevent data loss even in extreme circumstances. For more information, see Logical Replication Slot Failover.
  • The bug that is caused by the conflict between the tds_fdw extension and the plan cache is fixed.

• New features:
  • Privileged accounts are granted the permissions to create accounts that have the REPLICATION permission on data streams.
  • Privileged accounts are granted the permissions to create event triggers.
  • The rds_auditlog_max_query_length parameter is added. This parameter specifies the maximum length per audit log record.
  • An updated pg_cron extension is provided. After the update, this extension can be used to create and run cross-instance tasks. In addition, this extension provides a table named cron.job_log from which users can view task records.
  • The pg_freespacemap extension is supported.
  • Spatio-temporal memory topology indexes are supported by Ganos.
  • Version 3.2 of Ganos is supported.
• Bug fixes:
  • The bug due to which DTS reports check errors when more than one child transaction is started or committed during data migration is fixed.
  • The CVE-2020-14349 vulnerability is fixed. This vulnerability prevents ApsaraDB RDS from cleaning search paths in an expected manner during logical replications.
  • The CVE-2020-14350 vulnerability is fixed. This vulnerability allows CREATE EXTENSION statements to contain uncontrolled search path elements.
  • The CVE-2020-25695 vulnerability is fixed. Attackers can exploit this vulnerability to create permanent objects and call all SQL functions by using the credentials of a superuser account.

• New features:
  • Version 3.0 of Ganos is supported.
  • The sql_firewall extension is supported. This extension is used to prevent malicious injection of SQL statements.
  • The pg_bigm extension is supported. This extension is used to support fuzzy match.
  • The ZomboDB extension is supported. This extension is used to support text search and analysis.
• Bug fixes:
  • The bug due to which the backend cannot identify the rds_ prefix in parameters is fixed.
  • The bug due to which a secondary RDS instance unexpectedly exits when the failover slot has the same name as the streaming replication slot is fixed.
  • The bug due to which the pg_cron extension cannot be installed or used in an expected manner is fixed.
  • The bug in a global variable of the PASE extension is fixed.

New features:

• The pageinspect extension is supported by the rds_superuser role.
• The rds_superuser role can grant the REPLICATION permission to other users.

• New features:

  Version 2.8 of Ganos is supported.

• Bug fixes:

  The bug due to which the PASE extension executes the INSERT statement at a low speed based on Hierarchical Navigable Small World (HNSW) indexes is fixed.

New features:

• The Logical Replication Slot Failover feature is supported.
• Version 2.9.0 of the PL/Proxy extension is supported.
• Version 1.0 of the tsm_system_rows extension is supported.
• Version 1.0 of the tsm_system_time extension is supported.
• Version 1.0 of the smlar extension is supported.

• New features:
  • Version 2.14 of the hll extension is supported. This extension is used to support the HLL data type, respond to queries in milliseconds, and analyze approximate data at low costs and high speeds. For example, users can query page views (PVs) and unique visitors (UVs) in real time and check whether the approximate data that they analyze contains specified characteristic tags.
  • Version 1.1 of the oss_fdw extension is supported. This extension is used to store infrequently requested historical data to OSS buckets to reduce storage costs.
  • Version 2.0.1 of the tds_fdw extension is supported. This extension allows users to initiate requests on an RDS instance to query data from a Sybase or SQL Server database without the need to perform extract, transform and load (ETL) operations. This extension is also used to migrate data between an RDS instance and a Sybase or SQL Server database.
• Extension updates:
  • The extensions of Ganos are updated to version 2.7.
  • The wal2json extension is updated to version 2.2.
• Performance improvements:

  The shutdown -m fast command is optimized.

New features:

• The PASE extension is supported. This extension provides indexes that are used to recognize images.
• Privileged accounts are granted the permissions to publish all tables at a time and create subscriptions.

• New features:
  • Version 5.1 of Ganos is supported. For more information, see Release notes for Ganos.
  • The TDE feature is supported for tables.
  • Version 1.0 of the rds_tde_utils extension is supported.
  • Version 4.1 of the pg_profile extension is supported.
  • Version 2.2.1 of the pg_stat_kcache extension is supported.
• Bug fixes:

  None.

• New features:
  • Version 1.1.1 of the EncDB extension is supported.
  • The memory usage of the index_adviser extension is optimized.
• Bug fixes:

  The bug due to which the index_adviser extension accesses memory out of bounds in complex queries is fixed.

• New features:
  • Version 4.9 of Ganos is supported. For more information, see Release notes for Ganos.
    • The ST_Intersection aggregate function is supported. This function is used to aggregate an array of geometry objects.
    • The ST_AddZ function is supported. This function accepts z-axis values as the value of an input parameter and is used to convert a 2D or 3DM geometry to a 3D or 4D geometry.
    • The ST_SetValue function is enhanced to support the settings of pixel values based on the spatial range of a geometry object.
    • The S​T_ExportTo function is enhanced to export raster objects as COG files.
    • The ST_CreateRast function is enhanced to convert multiple raster records or arrays into raster objects.
    • The ST_Split function is enhanced to support the settings of the start time when you want to split a trajectory by time. The enhanced function also supports the splitting of a trajectory by trajectory point index.
    • The ST_Union function is enhanced to support batch execution based on memory usage to prevent out-of-memory (OOM) errors caused by large data volumes.
    • HDFS-based operations on raster data are supported.
  • The pg_jieba extension that is used to segment Chinese words is supported. The extension supports custom dictionaries and allows you to switch between dictionaries. The extension displays segmentation results based on the offset of each field.
• Bug fixes:
  • The bug due to which the index_adviser extension fails to respond when all recommended indexes already exist is fixed.
  • The bug that a privileged account cannot execute the CREATE PUBLICATION xxx FOR ALL TABLES; statement is fixed.

• New features:
  • Version 1.0.2 of the sequential-uuids extension is supported.
  • Version 1.1.9 of the EncDB extension is supported.
  • Version 4.6 of Ganos is supported. For more information, see Release notes for Ganos.
    • Raster data can be accessed by using self-managed MinIO servers. For more information, see Object storage paths.
    • The ST_PointValues raster function is added. This function is used to return the pixel values of all bands.
  • Standard accounts are granted the permissions to execute the LOAD statement to load the index_adviser and pg_hint_plan extensions.
  • Privileged accounts are granted the permissions to configure the BYPASSRLS parameter in the CREATE ROLE statement.
• Bug fixes:

  The bug that causes missing parameter values in slow SQL logs is fixed.

• New features:
  • Version 4.4 of Ganos is supported. For more information, see Release notes for Ganos.
  • PostGIS is updated to version 3.1.4, which supports ApsaraDB RDS for PostgreSQL. For more information, visit the PostGIS page
  • The pg_jieba extension is supported. This extension is used for Chinese tokenization.
  • The pldebugger extension is supported. This extension is used to debug stored procedures.
  • The log_statement parameter can be configured for a session, a user, or a database.
• Bug fixes:
  • The bug due to which the pg_cron extension causes memory leaks when users view the task records in the cron.job_log data table is fixed.
  • The bug due to which standard accounts do not have the permissions to call the pg_stat_reset() function is fixed.

• New features:

  The fully encrypted database feature can identify the versions of the EncDB SDK and EncJDBC. For more information, see Overview.

• Performance improvements:
  • The audit log feature is optimized. After the optimization, the audit log feature is enabled by default.
  • Ganos is optimized. After the optimization, the extensions of Ganos can be identified based on their descriptions and can be updated. For more information, see How do I update the plug-ins of Ganos?.
• Bug fixes:

  The bug due to which the extensions of Ganos report errors when functions are invoked is fixed. This bug is triggered if the extensions of Ganos are not updated at the earliest opportunity.

• New features:
  • Version 4.1 of Ganos is supported. In version 4.1, some functions are added, and some functions are enhanced. For more information, see Release notes for Ganos.
  • The rdsutils extension is provided. This extension is a proprietary extension of Alibaba Cloud and provides the failove_slots view.
  • Version 1.3.8 of the RUM extension is supported.
  • Version 2.4.0 of the pglogical extension is supported.
  • Version 2.3.15 of the PLV8 extension is supported.
• Performance improvements:
  • GCC is updated to version 9.2, and glibc is updated to version 2.30. After the updates, LTO is supported. If LTO is enabled, the overall performance can be improved by 5%.
  • The audit log feature is optimized. If the log_statement parameter is set to all, database performance can be improved by approximately four times in scenarios in which more than 50 active connections are established.
  • The default value of the rds_failover_slot_mode parameter is changed to async. This default value specifies that the Logical Replication Slot Failover feature is enabled. For more information, see Logical Replication Slot Failover.
  • The logging mechanism is optimized. ApsaraDB RDS no longer provides incomplete startup packet log records that are triggered by empty packets.
• Bug fixes:
  • The bug due to which the mysql_fdw extension causes memory leaks in some scenarios is fixed.
  • The bug due to which the pg_cron extension causes memory leaks in some scenarios is fixed.

• New features:
  • Version 3.8 of Ganos is supported.
    • The ST_AsDatasetFile function is added. This function is used to convert a specified part of a raster into a BYTEA-type file.
    • The ST_RasterDrivers function is added. This function is used to query all drivers that are supported by raster data sources in Ganos.
    • The bug due to which the ST_Clip function encounters reprojection failures when a spatial reference system is specified is fixed.
  • The pglogical extension is supported. This extension provides logical streaming replication by using a publish/subscribe pattern.
  • The pgAudit extension is supported. This extension is used to generate audit logs.
• Performance improvements:
  • Permission management is optimized. When the GRANT role1 TO role2 statement is executed, role2 does not carry over the CREATEDB or CREATEROLE permission from role1.
    Important The CREATEDB and CREATEROLE permissions are removed from the roles to which the GRANT statement is executed to grant these permissions.
  • Privileged accounts are granted the permissions to call the pg_ls_waldir() function.
  • The scanning method that is used by the monitoring and alerting feature is optimized to improve CPU performance.
  • The major version upgrade feature is optimized. For more information, see Upgrade the major engine version of an ApsaraDB RDS for PostgreSQL instance. This feature can be used to update extensions such as postgis and pgRouting with no downtime. This feature can also be used to update account permissions from PostgreSQL 9.4 to a later version with no downtime.
  • The maximum length per log record is increased from 1,024 bytes to 4,096 bytes when SQL statements cause insufficient memory or unexpected exits.
• Bug fixes:

  The bug due to which the oss_fdw extension accesses memory out of bounds in some scenarios is fixed.

• New features:
  • Version 3.7 of Ganos is supported.
  • The pg_repack extension is supported. This extension is used to clear tablespaces and mitigate table bloats.
  • PostgreSQL 10 is supported by the mysql_fdw extension.
  • Version 1.1 of the mysql_fdw extension is supported.
  • The major version upgrade feature is provided to migrate the user permissions, the mysql_fdw and oss_fdw extensions, and the permissions on these extensions with no downtime. For more information, see Upgrade the major engine version of an ApsaraDB RDS for PostgreSQL instance.
• Bug fixes:

  The bug due to which the oss_fdw extension cannot be used after a minor engine version update or a major engine version upgrade is fixed.

• New features:

  Version 3.6 of Ganos is supported.

• Bug fixes:

  The bug that triggers log-related online alerts if the archive_mode parameter is set to on is fixed.

New features:

• Version 3.3 of Ganos is supported.
• The Bloom extension is supported.
• The Logical Replication Slot Failover feature is supported.

• New features:
  • Privileged accounts are granted the permissions to create accounts that have the REPLICATION permission on data streams.
  • Privileged accounts are granted the permissions to create event triggers.
  • The rds_auditlog_max_query_length parameter is added. This parameter specifies the maximum length per audit log record.
  • An updated pg_cron extension is provided. After the update, this extension can be used to create and run cross-instance tasks. In addition, this extension provides a table named cron.job_log from which users can view task records.
  • The pg_freespacemap extension is supported.
  • Spatio-temporal memory topology indexes are supported by Ganos.
  • Version 3.2 of Ganos is supported.
• Bug fixes:
  • The bug due to which DTS reports check errors when more than one child transaction is started or committed during data migration is fixed.
  • The CVE-2020-14349 vulnerability is fixed. This vulnerability prevents ApsaraDB RDS from cleaning search paths in an expected manner during logical replications.
  • The CVE-2020-14350 vulnerability is fixed. This vulnerability allows CREATE EXTENSION statements to contain uncontrolled search path elements.
  • The CVE-2020-25695 vulnerability is fixed. Attackers can exploit this vulnerability to create permanent objects and call all SQL functions by using the credentials of a superuser account.

• New features:
  • Version 3.0 of Ganos is supported.
  • The sql_firewall extension is supported. This extension is used to prevent malicious injection of SQL statements.
  • The pg_bigm extension is supported. This extension is used to support fuzzy match.
• Bug fixes:

  The bug due to which the pg_cron extension cannot be installed or used in an expected manner is fixed.

• New features:
  • A specified number of connections can be reserved for the rds_superuser role. If users assume this role, they can log on to an RDS instance to troubleshoot issues even if the number of established connections to the RDS instance reaches the upper limit.
  • Version 2.6 of Ganos is supported.
• Bug fixes:

  The bug that triggers long waits during streaming replication is fixed.

• New features:
  • AliPG is updated to adapt to PostgreSQL 10.9.
  • The synchronous replication mode can be demoted to the asynchronous replication mode when the ongoing replication times out.
• Bug fixes:
  • The bug due to which the pg_hint_plan extension cannot be installed is fixed.

Performance improvements:

The major version upgrade feature is optimized. For more information, see Upgrade the major engine version of an ApsaraDB RDS for PostgreSQL instance. This feature can be used to update extensions such as postgis and pgRouting with no downtime. This feature can also be used to update account permissions from PostgreSQL 9.4 to a later version with no downtime.

Bug fixes:

• The CVE-2020-25694 vulnerability is fixed. This vulnerability may cause ApsaraDB RDS to lose security parameters when RDS instances are switched over to other connections. If security parameters are lost, these RDS instances are vulnerable to attacks.
• The CVE-2020-25695 vulnerability is fixed. Attackers can exploit this vulnerability to create permanent objects and call all SQL functions by using the credentials of a superuser account.
• The CVE-2020-25696 vulnerability is fixed. This vulnerability allows the gset command to overwrite the variables that are processed based on specified conditions.

• New features:
  • Version 2.2 of the wal2json extension is supported.
  • Version 1.0 of the xml2 extension is supported.
• Bug fixes:

  The bug due to which memory resources are exhausted when the wal2json extension runs is fixed.

New features:

A specified number of connections can be reserved for the rds_superuser role. If users assume this role, they can log on to an RDS instance to troubleshoot issues even if the number of established connections to the RDS instance reaches the upper limit.

AliPG is updated to adapt to PostgreSQL 9.4.19.