## Ariadne Conill (aria...@dereferenced.org):
> update users set info=jsonb_set(info, '{bar}', info->'foo');
>
> Typically, this works nicely, except for cases where evaluating
> info->'foo' results in an SQL null being returned. When that happens,
> jsonb_set() returns an SQL null, which then results in data loss.[3]
So why don't you use the facilities of SQL to make sure to only
touch the rows which match the prerequisites?
UPDATE users SET info = jsonb_set(info, '{bar}', info->'foo')
WHERE info->'foo' IS NOT NULL;
No special wrappers required.
Regards,
Christoph
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Spare Space
