Mercurial > libervia-pubsub
annotate db/sat_pubsub_update_4_5.sql @ 451:0e6e176cb572
pgsql: fix items order:
Due to a misinterpretation, items where returned in wrong order when RSM was used.
Pubsub vanilla `max_items` is reversing the items order to get last items, but when this
attribute is not used (RSM being used or not), the items must be in chronological order.
This patch fixes it, so RSM returns oldest items by defaut, and empty `<before/>` must be
used to get last page (and thus most recent items).
Items are always finally ordered chronologically inside the returned page (default by
`update` time, but this can be modified when a specific order is requested).
Reference field is also fixed to use `updated` instead of `item_id` when item are ordered
by `update`.
author | Goffi <goffi@goffi.org> |
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date | Sun, 06 Jun 2021 19:42:57 +0200 |
parents | 1dc606612405 |
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403
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1 -- we check version of the database before doing anything |
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2 -- and stop execution if not good |
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3 \set ON_ERROR_STOP |
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4 DO $$ |
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5 DECLARE ver text; |
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6 BEGIN |
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7 SELECT value INTO ver FROM metadata WHERE key='version'; |
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8 IF NOT FOUND OR ver!='4' THEN |
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9 RAISE EXCEPTION 'This update file needs to be applied on database schema version 4, you use version %',ver; |
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10 END IF; |
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11 END$$; |
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12 \unset ON_ERROR_STOP |
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13 -- end of version check |
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14 |
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15 /* new "max_items" and "consistent publisher" options */ |
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16 ALTER TABLE nodes ADD COLUMN max_items integer NOT NULL DEFAULT 0 |
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17 CHECK (max_items >= 0); |
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18 ALTER TABLE nodes ADD COLUMN consistent_publisher boolean NOT NULL DEFAULT FALSE; |
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19 |
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20 UPDATE metadata SET value='5' WHERE key='version'; |