On 30th of July, Andrew Dunstan committed patch: Add IF NOT EXISTS processing to ALTER TABLE ADD COLUMN Fabrízio de Royes Mello, reviewed by Payal Singh, Alvaro Herrera and Michael Paquier.

On 5th of April, Simon Riggs committed patch: Reduce lock levels of some trigger DDL and add FKs Reduce lock levels to ShareRowExclusive for the following SQL CREATE TRIGGER (but not DROP or ALTER) ALTER TABLE ENABLE TRIGGER ALTER TABLE DISABLE TRIGGER ...

On 7th of December, Simon Riggs committed patch: Event Trigger for table_rewrite Generate a table_rewrite event when ALTER TABLE attempts to rewrite a table. Provide helper functions to identify table and reason. Intended use case is to help assess or to react to schema changes that ...

On 2nd of September, Fujii Masao committed patch: Support ALTER SYSTEM RESET command. This patch allows us to execute ALTER SYSTEM RESET command to remove the configuration entry from postgresql.auto.conf. Vik Fearing, reviewed by Amit Kapila and me.

On 22nd of August, Alvaro Herrera committed patch: Implement ALTER TABLE .. SET LOGGED / UNLOGGED This enables changing permanent (logged) tables to unlogged and vice-versa. (Docs for ALTER TABLE / SET TABLESPACE got shuffled in an order that hopefully makes more sense than the ...

On 18th of December, Tatsuo Ishii committed patch: Add ALTER SYSTEM command to edit the server configuration file. Patch contributed by Amit Kapila. Reviewed by Hari Babu, Masao Fujii, Boszormenyi Zoltan, Andres Freund, Greg Smith and others. On the next day, Fujii Masao committed ...

On 28th of June, Simon Riggs committed patch: ALTER TABLE ... ALTER CONSTRAINT for FKs Allow constraint attributes to be altered, so the default setting of NOT DEFERRABLE can be altered to DEFERRABLE and back. Review by Abhijit Menon-Sen

Three patches for you today, all committed by Robert Hass: On 7th of February, patch: Add a transform function for numeric typmod coercisions. This enables ALTER TABLE to skip table and index rebuilds when a column is changed to an unconstrained numeric, or when ...

On 23th of January, Simon Riggs committed patch: ALTER [IF EXISTS] ... allows silent DDL if required, e.g. ALTER FOREIGN TABLE IF EXISTS foo RENAME TO bar Pavel Stehule

On 18th of July, Robert Haas committed patch: Avoid index rebuild for no-rewrite ALTER TABLE .. ALTER TYPE. Noah Misch. Review and minor cosmetic changes by me.