Looks correct to me. As I understand it the ::jsonb is NOT an operator! It is a syntactic construct for a CAST(). An equivalent which might make more sense is:
My issue is nothing to do with the ::jsonb cast, it's the precedence of the ->> operator.
As far as I can see the ->> operator has predence below '- +' but above 'IS', but there's no entry for it in that place in the precedence table.
Ah. I see your point now. Sorry about that.
Geoff
--
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Yoda of Borg, we are. Futile, resistance is, yes. Assimilated, you will be.