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JSON array is not updated if updating with empty array - Mailing list pgsql-bugs

From Radics Geza
Subject JSON array is not updated if updating with empty array
Date
Msg-id CAJFbfO84H34Fqyxgk2S8erN+FarooDeKS+vMM1dvvs9gPkq5oA@mail.gmail.com
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Re: JSON array is not updated if updating with empty array
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Json column is not updated if the update is an empty array '[]'.

UPDATE table SET "jsonbcol" = '[{"a":1}]';
UPDATE table SET "jsonbcol = '[]' RETURNING "jsonbcol";

jsonbcol
------------
 [{"a": 1}]
(1 row)

It worked in postgres 9.6, but not in 11.7 / 12.2

thanks!

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