SQL Server

Copy JSON Object from one JSON Array to Another

See more JSON Examples

Demonstrates how to copy an object in a JSON array to another JSON array. SQL Server

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @arr1 int
    EXEC @hr = sp_OACreate 'Chilkat.JsonArray', @arr1 OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @arr2 int
    EXEC @hr = sp_OACreate 'Chilkat.JsonArray', @arr2 OUT

    DECLARE @s nvarchar(4000)
    SELECT @s = '[{"a":1}, {"b":2}, {"c":3}]'
    DECLARE @sEmpty nvarchar(4000)
    SELECT @sEmpty = '[]'

    DECLARE @success int
    EXEC sp_OAMethod @arr1, 'Load', @success OUT, @s
    EXEC sp_OAMethod @arr2, 'Load', @success OUT, @sEmpty

    DECLARE @jObj int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @jObj OUT

    EXEC sp_OAMethod @arr1, 'ObjectAt2', @success OUT, 1, @jObj

    EXEC sp_OAMethod @arr2, 'AddObjectCopyAt', @success OUT, -1, @jObj

    EXEC sp_OAMethod @arr2, 'Emit', @sTmp0 OUT
    PRINT @sTmp0

    -- output is:   [{"b":2}]

    EXEC @hr = sp_OADestroy @arr1
    EXEC @hr = sp_OADestroy @arr2
    EXEC @hr = sp_OADestroy @jObj


END
GO