(SQL Server) Append New Item to JSON Array

Demonstrates the notations that can be used in a JSON array index to append to the end of an array.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

-- 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)
    -- Starting in Chilkat v9.5.0.77, the following notations are possible to specify that the value
    -- should be appended to the end of the array. (In other words, if the array currenty has N elements, then "-1", "", or "*" 
    -- indicate an index of N+1.

    DECLARE @json int
    -- Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @json OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @success int
    EXEC sp_OAMethod @json, 'UpdateInt', @success OUT, 'lanes[-1]', 0
    EXEC sp_OAMethod @json, 'UpdateInt', @success OUT, 'lanes[]', 1
    EXEC sp_OAMethod @json, 'UpdateInt', @success OUT, 'lanes[*]', 2
    EXEC sp_OAMethod @json, 'UpdateInt', @success OUT, 'lanes[-1]', 3

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

    -- Output is:  {"lanes":[0,1,2,3]}

    EXEC @hr = sp_OADestroy @json


END
GO