Peter Eisentraut 8e72d914c5 Add UPDATE/DELETE FOR PORTION OF ... This is an extension of the UPDATE and DELETE commands to do a "temporal update/delete" based on a range or multirange column. The user can say UPDATE t FOR PORTION OF valid_at FROM '2001-01-01' TO '2002-01-01' SET ... (or likewise with DELETE) where valid_at is a range or multirange column. The command is automatically limited to rows overlapping the targeted portion, and only history within those bounds is changed. If a row represents history partly inside and partly outside the bounds, then the command truncates the row's application time to fit within the targeted portion, then it inserts one or more "temporal leftovers": new rows containing all the original values, except with the application-time column changed to only represent the untouched part of history. To compute the temporal leftovers that are required, we use the *_minus_multi set-returning functions defined in 5eed8ce50c. - Added bison support for FOR PORTION OF syntax. The bounds must be constant, so we forbid column references, subqueries, etc. We do accept functions like NOW(). - Added logic to executor to insert new rows for the "temporal leftover" part of a record touched by a FOR PORTION OF query. - Documented FOR PORTION OF. - Added tests. Author: Paul A. Jungwirth <pj@illuminatedcomputing.com> Reviewed-by: Peter Eisentraut <peter@eisentraut.org> Discussion: https://www.postgresql.org/message-id/flat/ec498c3d-5f2b-48ec-b989-5561c8aa2024%40illuminatedcomputing.com		2026-04-01 19:06:03 +02:00
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eval_plan_qual.out	postgres_fdw: Add more test coverage for EvalPlanQual testing.	2025-11-06 12:15:00 +09:00
postgres_fdw.out	Add UPDATE/DELETE FOR PORTION OF	2026-04-01 19:06:03 +02:00
query_cancel.out	postgres_fdw: re-issue cancel requests a few times if necessary.	2024-12-23 15:14:30 -05:00
query_cancel_1.out	postgres_fdw: Split out the query_cancel test to its own file	2024-07-22 12:49:57 +02:00