JSONPaths file: Parse a JSON object contained within a JSON array - json

Question

I have rows of the following JSON form:
[
{
"id": 1,
"costs": [
{
"blue": 100,
"location":"courts",
"sport": "football"
}
]
}
]
I want to upload this into a redshift table as follows:
id | blue | location | sport
--------+------+---------+------
1 | 100 | courts |football
The following JSONPaths file is not successful:
{
"jsonpaths": [
"$.id",
"$.costs[0].blue",
"$.costs[0].location",
"$.costs[0].sport"
]
}
Redshift returns the following error code:
err_code: 1216 Invalid JSONPath format: Member is not an object.
How can I change the jsonpaths file to be able to upload the json as desired?

Answer 1

The answer to this is provided by John Rotenstein in the comments. I am just formalizing the answer here.
As shown in the documentation, the input JSON records have to be a new line delimited sequence of JSON objects. The examples show the JSON objects as pretty printed, but typically the input stream of records would be one JSON object per line.
{ "id": 1, "costs": [ { "blue": 100, "location":"courts", "sport": "football" } ] }
{ "id": 2, "costs": [ { "blue": 200, "location":"fields", "sport": "cricket" } ] }
So, technically the input record stream is not required to be a valid JSON, but a stream of delimited valid JSON objects.