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 '}',
'$.root[*]'
Columns( "Code" VarChar(5),
"Name" VarChar(50))) x;
This web service returns:
[{"Code": "AF", "Name": "Afghanistan"},{"Code": "AX", "Name": "\u00c5land
Islands"}, ....]
Mit freundlichen Grüßen / Best regards
Birgitta Hauser
"Shoot for the moon, even if you miss, you'll land among the stars." (Les
Brown)
"If you think education is expensive, try ignorance." (Derek Bok)
"What is worse than training your staff and losing them? Not training them
and keeping them!"
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don't want to.? (Richard Branson)
-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxx> On Behalf Of Mendoza, Lynelle
I. M.
Sent: Donnerstag, 2. August 2018 14:01
To: rpg400-l@xxxxxxxxxxxx
Subject: Using JSON_TABLE on an array that starts with a square bracket
Hello All,
I was able to get the name and country of JSON array below if it starts with
a curly bracket:
{"items":[{"name": "MyFirstCompany","country": "DE"},{"id": 2,"name":
"MySecondCompany", "country": "DE"}]}
using this SQL command:
with y as (
Select * from JSON_TABLE(get_clob_from_file('/test.json'), '$'
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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