Re: Better explanation of unnest with ordinality

2021-01-27 Thread m7o...@gmail.com
On Wed, Jan 27, 2021 at 7:47 PM Tom Lane wrote: > > What is less clear is the definition of UNNEST, for which that text refers > you to 9.19 What about some json functions that return setof, e.g. jsonb_to_recordset (https://www.postgresql.org/docs/13/functions-json.html)? Should we keep the same

Re: Better explanation of unnest with ordinality

2021-01-27 Thread Tom Lane
- writes: > I’ve recently come across a query of the kind: > select * from unnest(array[1,2,3,4]) with ordinality t; > and was asked whether ordinality value is guaranteed to be the same as the > array index of the array element in the same tuple. The only relevant thing > about ordinality colum

Better explanation of unnest with ordinality

2021-01-27 Thread -
Hi guys! I’ve recently come across a query of the kind: select * from unnest(array[1,2,3,4]) with ordinality t; and was asked whether ordinality value is guaranteed to be the same as the array index of the array element in the same tuple. The only relevant thing about ordinality column I’ve found