A bug with the TimeStampTZ data type and the 'AT TIME ZONE' clause

-- A bug with the TimeStampTZ data type and the 'AT TIME ZONE' clause

--

-- I'm in the CST time zone.

-- A friend in the EST zone wants me to call him at 11:00 EST. I insert
that row.

-- To find the time I should call him, I select the row back for my time
zone, expecting 10:00 CST as: 11:00 EST = 10:00 CST... google: 11:00 EST to
CST

-- Troy Frericks, 07-Feb-2022

*SELECT* *version*() -- Get my Version, returns 14.0

*SELECT* *abbrev* -- Get my time zone, returns CST

*FROM* pg_timezone_names

*WHERE* *name* = *current_setting*('TIMEZONE');

-- DROP TABLE tsTable;

*CREATE* *TABLE* tsTable (tsCol *timestamptz*);

*INSERT* *INTO* tsTable *VALUES* ('2022-02-07 11:00:00' *AT* *TIME* *ZONE*
'EST'); -- 11:00 AM EST

*SELECT*

tsCol *AT* *time* *ZONE* 'CST' *AS* "CST" -- Query time as CST, Returns
2022-02-07 12:00:00.000, should be 10:00

*FROM* tsTable;

-- ###

--

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