Guruprasad has proposed merging ~lgp171188/launchpad:add-locked-column-to-bug-table into launchpad:db-devel.
Commit message: Add 'locked' field to Bug This will be used to store the values of an enum containing the possible values. Requested reviews: Launchpad code reviewers (launchpad-reviewers) For more details, see: https://code.launchpad.net/~lgp171188/launchpad/+git/launchpad/+merge/413934 -- Your team Launchpad code reviewers is requested to review the proposed merge of ~lgp171188/launchpad:add-locked-column-to-bug-table into launchpad:db-devel.
diff --git a/database/schema/patch-2210-38-0.sql b/database/schema/patch-2210-38-0.sql new file mode 100644 index 0000000..fca2fec --- /dev/null +++ b/database/schema/patch-2210-38-0.sql @@ -0,0 +1,18 @@ +-- Copyright 2022 Canonical Ltd. This software is licensed under the +-- GNU Affero General Public License version 3 (see the file LICENSE). + +SET client_min_messages=ERROR; + +ALTER TABLE Bug + ADD COLUMN locked INTEGER; + +-- ALTER COLUMN ... SET DEFAULT doesn't trigger a table rewrite, +-- while ADD COLUMN ... DEFAULT xx does. In pg <11 this operation is slow. +-- That's why we first create, and then we set the default value. +-- Data backfilling will be done in a hot patch instead of a fast downtime. + +ALTER TABLE Bug ALTER COLUMN locked SET DEFAULT 1; + +COMMENT ON COLUMN Bug.locked IS 'The current lock status of this bug.'; + +INSERT INTO LaunchpadDatabaseRevision VALUES (2210, 38, 0);
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