Thread

1. Using vars in jsonbpath operator ?

   Markur Sens <markursens@gmail.com> — 2023-06-16T11:54:35Z

   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 this cannot 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 index can be used ? ? 
   
   
   
   
   

2. Re: Using vars in jsonbpath operator ?

   shammat@gmx.net — 2023-06-16T13:24:54Z

   
   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 this cannot 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 index can 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