What is the equivalent for coalesce
in the new jOOQ 3.14 SQL/JSON supporting version (in PostgreSQL)?
select coalesce(json_agg(t.*), '[]'::json)
from (select 'test' as mycol where 1 = 2) t;
The following unfortunately fails with the error "COALESCE types json and uuid[] cannot be matched".
coalesce(jsonArrayAgg(mycol), emptyArray<type>())
JSON.json()
or JSONB.jsonb()
, eg:
coalesce(jsonArrayAgg(mycol), inline(json("[]")))
coalesce(jsonbArrayAgg(mycol), inline(jsonb("[]")))
But you can also use the jsonArray()
or jsonbArray()
constructors:
coalesce(jsonArrayAgg(mycol), jsonArray())
coalesce(jsonbArrayAgg(mycol), jsonbArray())
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