Re: Using vars in jsonbpath operator ?

Markur Sens schrieb am 16.06.2023 um 13:54:
> I understand that on a where clause a gin index can be used for the following predicate
>
> a.data @? '$.results.docs[*].accs[*] ? (@.id == “123")
>
> I have a join query however on the following condition
>
> jsonb_path_exists(a.data, '$.results.docs[*].accs[*] ? (@.number == $id)', jsonb_build_object(‘id', *b.id*))  but
thiscannot use a gin index afaik and results in a seq scan. 
>
> Is there anyway to use the operator syntax above by passing the b.id <http://b.id> variable somwehow so that the gin
indexcan be used ? ?  
>

I think you will need to pass the whole jsonpath as a parameter, e.g.


    a.data @? cast($1 as jsonpath)


At least that's the only way I could achieve this