Below you will find a detailed account of the changes between PostgreSQL 11 and the previous major release. If you are using an older version, such as version9.6, see Database Migration from Version 9 to 10. PostgreSQL 15. Ensure that psql reports the proper user name when prompting for a password (Tom Lane). E.10.1. Retain WAL data for only a single checkpoint (Simon Riggs). pg_upgrade will check pg_controldata to make sure all settings are compatible before starting the upgrade. That is, the tables on the publication and on the subscription side must be normal tables, not views, materialized views, partition root tables, or foreign tables. pg_upgrade does its best to make sure the old and new clusters are binary-compatible, e.g., by checking for compatible compile-time settings, including 32/64-bit binaries. This new column more clearly distinguishes functions, procedures, aggregates, and window functions. Improve optimizer's row count estimates for EXISTS and NOT EXISTS queries (Tom Lane), Make the optimizer account for evaluation costs and selectivity of HAVING clauses (Tom Lane), Add Just-in-Time (JIT) compilation of some parts of query plans to improve execution speed (Andres Freund). PostgreSQL 14.3, 13.7, 12.11, 11.16, and 10.21 Released! Also improve PL/Python domain handling. The people I work for come from SQL Server. You will have to read the release notes for all 11 versions you haven't kept up with. Previously, option names in certain SQL commands were forcibly lower-cased even if entered with double quotes; thus for example "FillFactor" would be accepted as an index storage option, though properly its name is lower-case. You might need to set connection parameters to match your new cluster. Below is the complete archive of release notes for every version of PostgreSQL. Add pg_verify_checksums tool to verify database checksums while offline (Magnus Hagander), Allow pg_resetwal to change the WAL segment size via --wal-segsize (Nathan Bossart), Add long options to pg_resetwal and pg_controldata (Nathan Bossart, Peter Eisentraut), Add pg_receivewal option --no-sync to prevent synchronous WAL writes, for testing (Michael Paquier), Add pg_receivewal option --endpos to specify when WAL receiving should stop (Michael Paquier), Allow pg_ctl to send the SIGKILL signal to processes (Andres Freund). You can use the same port number for both clusters when doing an upgrade because the old and new clusters will not be running at the same time. Allow bitmap scans to perform index-only scans when possible (Alexander Kuzmenkov), Update the free space map during VACUUM (Claudio Freire). Previously, WAL was retained for two checkpoints. Make psql's \d+ command always show the table's partitioning information (Amit Langote, Ashutosh Bapat). Add support for large pages on Windows (Takayuki Tsunakawa, Thomas Munro). This speeds access to partitioned tables with many partitions. Prevent extensions from creating custom server parameters that take a quoted list of values (Tom Lane). The default TOAST threshold has not been changed.
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