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fix(coderd/database): migrate workspaces.last_used_at to timestamptz #9699

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Merged
merged 8 commits into from
Sep 18, 2023
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fix(coderd/database): migrate workspaces.last_used_at to timestamptz #9699

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0fedbd3
fix(coderd/database): migrate workspaces.last_used_at to timestamptz
johnstcn Sep 15, 2023
0fcfe57
stop using utc loc in test
johnstcn Sep 15, 2023
d5babdf
stop using utc loc in test
johnstcn Sep 15, 2023
cd580fb
fixup! stop using utc loc in test
johnstcn Sep 15, 2023
19663d7
Merge remote-tracking branch 'origin/main' into cj/workspaces-last-us…
johnstcn Sep 15, 2023
939938e
Merge remote-tracking branch 'origin/main' into cj/workspaces-last-us…
johnstcn Sep 18, 2023
8953f64
Merge remote-tracking branch 'origin/main' into cj/workspaces-last-us…
johnstcn Sep 18, 2023
672f3e1
Merge remote-tracking branch 'origin/main' into cj/workspaces-last-us…
johnstcn Sep 18, 2023
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fix(coderd/database): migrate workspaces.last_used_at to timestamptz
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@johnstcn
johnstcn committed Sep 15, 2023
commit 0fedbd3bfc6fd215ece6c9e37afffb4e9838ccd9
2 changes: 1 addition & 1 deletion coderd/database/dump.sql
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6 changes: 6 additions & 0 deletions coderd/database/migrations/000155_workspaces_last_used_at_timestamptz.down.sql
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Original file line number Diff line number Diff line change
@@ -0,0 +1,6 @@
ALTER TABLE ONLY workspaces
ALTER COLUMN last_used_at
SET DATA TYPE timestamp
USING last_used_at::timestamptz,
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If we want to be 100% correct, this could use an AT TIME ZONE 'UTC' too because during the up migration we are changing the time (correctly) if the db time zone is non-UTC.

This demonstrates how the timestamp would be coerced into the wrong time without

woop=# create temp table testy (ts timestamp, tsz timestamptz);
CREATE TABLE
woop=# insert into testy (ts, tsz) values ('0001-01-01 00:00:00+00', '0001-01-01 00:00:00+00'); select * from testy;
INSERT 0 1
         ts          |             tsz
---------------------+------------------------------
 0001-01-01 00:00:00 | 0001-01-01 01:39:49+01:39:49
(1 row)

woop=# update testy set ts = tsz::timestamptz; select * from testy;
UPDATE 1
         ts          |             tsz
---------------------+------------------------------
 0001-01-01 01:39:49 | 0001-01-01 01:39:49+01:39:49
(1 row)

Whereas with the time zone change:

woop=# truncate table testy;
TRUNCATE TABLE
woop=# insert into testy (ts, tsz) values ('0001-01-01 00:00:00+00', '0001-01-01 00:00:00+00'); select * from testy;
INSERT 0 1
         ts          |             tsz
---------------------+------------------------------
 0001-01-01 00:00:00 | 0001-01-01 01:39:49+01:39:49
(1 row)

woop=# update testy set ts = tsz at time zone 'utc'; select * from testy;
UPDATE 1
         ts          |             tsz
---------------------+------------------------------
 0001-01-01 00:00:00 | 0001-01-01 01:39:49+01:39:49
(1 row)

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Updated!

ALTER COLUMN last_used_at
SET DEFAULT '0001-01-01 00:00:00'::timestamp;
6 changes: 6 additions & 0 deletions coderd/database/migrations/000155_workspaces_last_used_at_timestamptz.up.sql
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Original file line number Diff line number Diff line change
@@ -0,0 +1,6 @@
ALTER TABLE ONLY workspaces
ALTER COLUMN last_used_at
SET DATA TYPE timestamptz
USING last_used_at::timestamp AT TIME ZONE 'UTC',
ALTER COLUMN last_used_at
SET DEFAULT '0001-01-01 00:00:00+00:00'::timestamptz;