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annotate db/sat_pubsub_update_3_4.sql @ 374:40e5edd7ea11

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storage: changed items order: items were so far ordered by item_id, i.e. by order of creation. This has been changed to order them by date of last update, so an item overwritting an old one appears on top (with former behaviour, it was staying at the same place). The XEP is not clear on that, but this seems more in correct with ยง 6.5.7 which says "implementations SHOULD return the N most recent (as opposed to the N oldest) items".
author Goffi <goffi@goffi.org>
date Thu, 03 Jan 2019 20:31:03 +0100
parents a772f7dac930
children 1dc606612405
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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367
a772f7dac930 backend, storage(pgsql): creation/update date + serial ids:
Goffi <goffi@goffi.org>
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1 -- we check version of the database before doing anything
a772f7dac930 backend, storage(pgsql): creation/update date + serial ids:
Goffi <goffi@goffi.org>
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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 $$
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5 DECLARE ver text;
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6 BEGIN
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7 SELECT value INTO ver FROM metadata WHERE key='version';
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8 IF NOT FOUND OR ver!='3' THEN
a772f7dac930 backend, storage(pgsql): creation/update date + serial ids:
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9 RAISE EXCEPTION 'This update file need to be applied on database schema version 3, you use version %',ver;
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10 END IF;
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11 END$$;
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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 "serial ids" option */
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16 ALTER TABLE nodes ADD COLUMN serial_ids boolean NOT NULL DEFAULT FALSE;
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17
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18 /* we want to keep creation and update times */
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19 ALTER TABLE items RENAME COLUMN date TO created;
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20 ALTER TABLE items ADD COLUMN updated timestamp with time zone NOT NULL DEFAULT now();
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21
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22 UPDATE metadata SET value='4' WHERE key='version';