Interesting.

I had a play when I saw the original post and couldn't get JSON_TABLE
function to parse without the key - thanks for confirming that Birgitta.

Also I hadn't used systools.HTTPGETCLOB - that's really good to know.

Thanks so much for your time and information.
best regards,
Craig

On 2 August 2018 at 16:19, Birgitta Hauser <Hauser@xxxxxxxxxxxxxxx> wrote:

Currently you cannot directly consume json data that starts with an array.
It is not supported by JSON_TABLE
What you can do, is to embedd your array in an object and parse the result.

Something like this:
Select *
from JSON_TABLE('{ "root": ' concat

systools.HTTPGETCLOB('https://pkgstore.datahub.io/core/
country-list/latest/d
ata/json/data.json' , '')
concat '}',
'$.root[*]'
Columns( "Code" VarChar(5),
"Name" VarChar(50))) x;

This web service returns:
[{"Code": "AF", "Name": "Afghanistan"},{"Code": "AX", "Name": "\u00c5land
Islands"}, ....]

Mit freundlichen Grüßen / Best regards

Birgitta Hauser

"Shoot for the moon, even if you miss, you'll land among the stars." (Les
Brown)
"If you think education is expensive, try ignorance." (Derek Bok)
"What is worse than training your staff and losing them? Not training them
and keeping them!"
„Train people well enough so they can leave, treat them well enough so they
don't want to.“ (Richard Branson)


-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxx> On Behalf Of Mendoza,
Lynelle
I. M.
Sent: Donnerstag, 2. August 2018 14:01
To: rpg400-l@xxxxxxxxxxxx
Subject: Using JSON_TABLE on an array that starts with a square bracket

Hello All,

I was able to get the name and country of JSON array below if it starts
with
a curly bracket:
{"items":[{"name": "MyFirstCompany","country": "DE"},{"id": 2,"name":
"MySecondCompany", "country": "DE"}]}

using this SQL command:
with y as (
Select * from JSON_TABLE(get_clob_from_file('/test.json'), '$'
columns( nested '$.items[*]' columns(
"name" varchar(30),
"country" varchar(02)
) ) ) x ) select * from y with ur;

However, the JSON data I want to parse starts with a square bracket and
looks like this:
'[{"name": "MyFirstCompany","country": "DE"},{"id": 2,"name":
"MySecondCompany", "country": "DE"}]'

But I wasn't able to get any rows using this command:
with y as (
Select * from JSON_TABLE(
'[{"name": "MyFirstCompany","country": "DE"},{"id": 2,"name":
"MySecondCompany", "country": "DE"}]', '$'
columns(
nested 'lax $[*]' columns(
"name" varchar(30),
"country" varchar(02)
) ) ) x
) select * from y with ur;

Kindly advise on correct command on parsing JSON array that starts with a
square bracket.

Thanks,
Lynelle


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