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Title: Неблокирующее перестроение PK таблицы (по отдельной опции конечно) · Issue #139 · pgcodekeeper/pgcodekeeper · GitHub

Open Graph Title: Неблокирующее перестроение PK таблицы (по отдельной опции конечно) · Issue #139 · pgcodekeeper/pgcodekeeper

X Title: Неблокирующее перестроение PK таблицы (по отдельной опции конечно) · Issue #139 · pgcodekeeper/pgcodekeeper

Description: Уважаемые разработчики, предлагаю реализовать неблокирующее перестроение PK таблицы (по отдельной опции конечно) сейчас выполняется обычный DROP/CREATE ALTER TABLE bankrupt.message DROP CONSTRAINT pk_message; ALTER TABLE bankrupt.message...

Open Graph Description: Уважаемые разработчики, предлагаю реализовать неблокирующее перестроение PK таблицы (по отдельной опции конечно) сейчас выполняется обычный DROP/CREATE ALTER TABLE bankrupt.message DROP CONSTRAINT ...

X Description: Уважаемые разработчики, предлагаю реализовать неблокирующее перестроение PK таблицы (по отдельной опции конечно) сейчас выполняется обычный DROP/CREATE ALTER TABLE bankrupt.message DROP CONSTRAINT ...

Opengraph URL: https://github.com/pgcodekeeper/pgcodekeeper/issues/139

X: @github

direct link

Domain: patch-diff.githubusercontent.com


Hey, it has json ld scripts:
{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Неблокирующее перестроение PK таблицы (по отдельной опции конечно)","articleBody":"Уважаемые разработчики,\r\nпредлагаю реализовать неблокирующее перестроение PK таблицы (по отдельной опции конечно)\r\nсейчас выполняется обычный DROP/CREATE\r\n```\r\nALTER TABLE bankrupt.message\r\n\tDROP CONSTRAINT pk_message;\r\n\r\nALTER TABLE bankrupt.message\r\n\tADD CONSTRAINT pk_message PRIMARY KEY (id_message) INCLUDE (id_annulment_message);\r\n```\r\nили так:\r\n```\r\nALTER TABLE bankrupt.message\r\n\tDROP CONSTRAINT pk_message;\r\n\r\nDO $$\r\nBEGIN\r\n\tALTER TABLE bankrupt.message\r\n\t\tADD CONSTRAINT pk_message PRIMARY KEY (id_message) INCLUDE (id_annulment_message);\r\nEXCEPTION WHEN OTHERS THEN\r\n\tIF (SQLSTATE = '42P16') THEN\r\n\t\tRAISE NOTICE '%, skip', SQLERRM;\r\n\tELSE\r\n\t\tRAISE;\r\n\tEND IF;\r\nEND; $$\r\nLANGUAGE 'plpgsql';\r\n```\r\n\r\nПредлагаю вот такой механизм замены PK\r\n```\r\nCREATE UNIQUE INDEX CONCURRENTLY tmp1052687613_unq ON bankrupt.message USING btree (id_message) INCLUDE (id_annulment_message);\r\n--\r\nDO $$ \r\nDECLARE\r\n    v_indexname text;\r\nBEGIN\r\n    v_indexname = (SELECT c.relname FROM pg_index i INNER JOIN pg_class c ON i.indexrelid = c.oid WHERE NOT indisvalid LIMIT 1); -- In INVALID state\r\n    IF v_indexname is not null THEN\r\n            RAISE 'In INVALID state - CREATE INDEX CONCURRENTLY %', v_indexname;\r\n    END IF;\r\nEND; $$\r\nLANGUAGE 'plpgsql';\r\n\r\nALTER TABLE bankrupt.message DROP CONSTRAINT pk_message,\r\n    ADD CONSTRAINT pk_message PRIMARY KEY USING INDEX tmp1052687613_unq;\r\n```\r\nт.е. создаем в конкурентном режиме новый индекс, а потом одной командой выполняем удаление и добавление. 1 команда 1 транзакция.\r\n\r\nКстати на сейчас pgcodekeeper такие команды считает ошибочными:\r\n![изображение](https://github.com/pgcodekeeper/pgcodekeeper/assets/10084993/5eac83be-6451-4919-a465-dce09d0c6412)\r\n","author":{"url":"https://github.com/sgrinko","@type":"Person","name":"sgrinko"},"datePublished":"2024-03-19T11:52:32.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/139/pgcodekeeper/issues/139"}

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Неблокирующее перестроение PK таблицы (по отдельной опции конечно)https://patch-diff.githubusercontent.com/pgcodekeeper/pgcodekeeper/issues/139#top
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on Mar 19, 2024https://github.com/pgcodekeeper/pgcodekeeper/issues/139#issue-2194760493
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