Not able to parse JSON in synapse SQL with OPENJSON - sql-server

Question

This question has a reference to my earlier SO thread. Here it is.
In a nutshell, I am trying to parse a JSON input in Synapse SQL.
DECLARE #json nvarchar(max)
SET #json= '{"value": "{\"value\":[{\"ERDAT\":\"20210511\"},{\"ERDAT\":\"20210511\"},
{\"ERDAT\":\"20210511\"},{\"ERDAT\":\"20210511\"},"type": "String"}';
DECLARE #ReplacedDetails nvarchar(max), #ReplacedStringDetails nvarchar(max)
SET #ReplacedDetails = REPLACE(LTRIM(RTRIM(#json)),'\','');
SET #ReplacedStringDetails = REPLACE(#ReplacedDetails,',"type": "String"','');
SELECT #ReplacedStringDetails
CREATE TABLE #ValueTable_15
(
ColumnName varchar(200),
LastUpdatedValue varchar(200)
);
INSERT INTO #ValueTable_15 (ColumnName,LastUpdatedValue)
SELECT TOP(1) j2.[key],TRY_PARSE(j2.[value] as bigint) AS LastUpdatedValue
FROM OPENJSON(#ReplacedStringDetails, '$.value.value') j1
CROSS APPLY OPENJSON(j1.value) j2
ORDER BY LastUpdatedValue DESC;
Then when I am running the above query, I am getting error:
Microsoft][ODBC Driver 17 for SQL Server][SQL Server]JSON text is not properly formatted. Unexpected character 'v' is found at position 13
When I am simply trying to SELECT #ReplaceStringDetails it is giving the expected results.
What I am missing here?
P.S. I replaced $.value.value with simple $.value, but yielding no result.

Answer 1

As noted in the comments it appears that the characters ]}" got removed before ,"type": "String"}. If you correct that edit you should be able to parse the JSON using the normal OPENJSON() table-valued function, e.g.:
DECLARE #json nvarchar(max)
SET #json= '{"value": "{\"value\":[{\"ERDAT\":\"20210511\"},{\"ERDAT\":\"20210511\"},{\"ERDAT\":\"20210511\"},{\"ERDAT\":\"20210511\"}]}","type": "String"}';
SELECT [embedded].*
FROM OPENJSON(#json) WITH (
[value] nvarchar(max) --nope: AS JSON
) [wrapper]
CROSS APPLY OPENJSON(wrapper.value, '$.value') WITH (
[ERDAT] nvarchar(10)
) [embedded];
Which returns the results...
ERDAT
20210511
20210511
20210511
20210511