### What?
With Postgres, before join to self like:
```ts
import type { CollectionConfig } from 'payload'
export const SelfJoins: CollectionConfig = {
slug: 'self-joins',
fields: [
{
name: 'rel',
type: 'relationship',
relationTo: 'self-joins',
},
{
name: 'joins',
type: 'join',
on: 'rel',
collection: 'self-joins',
},
],
}
```
wasn't possible, even though it's a valid usage.
### How?
Now, to differentiate parent `self_joins` and children `self_joins` we
do additional alias for the nested select -
`"4d3cf2b6_1adf_46a8_b6d2_3e1c3809d737"`:
```sql
select
"id",
"rel_id",
"updated_at",
"created_at",
(
select
coalesce(
json_agg(
json_build_object('id', "joins_alias".id)
),
'[]' :: json
)
from
(
select
"created_at",
"rel_id",
"id"
from
"self_joins" "4d3cf2b6_1adf_46a8_b6d2_3e1c3809d737"
where
"4d3cf2b6_1adf_46a8_b6d2_3e1c3809d737"."rel_id" = "self_joins"."id"
order by
"4d3cf2b6_1adf_46a8_b6d2_3e1c3809d737"."created_at" desc
limit
$1
) "joins_alias"
) as "joins_alias"
from
"self_joins"
where
"self_joins"."id" = $2
order by
"self_joins"."created_at" desc
limit
$3
```
Fixes https://github.com/payloadcms/payload/issues/10144
-->
a0d8131649
