(SQL Server) Load a JSON Array

The Chilkat JSON API requires the top-level JSON to be an object. Therefore, to load an array requires that it first be wrapped as an object.

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
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int

    -- Imagine we want to load this JSON array for parsing:
    DECLARE @jsonArrayStr nvarchar(4000)
    SELECT @jsonArrayStr = '[{"id":200},{"id":196}]'

    -- First wrap it in a JSON object by prepending "{ "array":" and appending "}"
    DECLARE @sbJson int
    -- Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sbJson OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    EXEC sp_OAMethod @sbJson, 'Append', @success OUT, '{"array":'
    EXEC sp_OAMethod @sbJson, 'Append', @success OUT, @jsonArrayStr
    EXEC sp_OAMethod @sbJson, 'Append', @success OUT, '}'

    DECLARE @json int
    -- Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @json OUT

    EXEC sp_OAMethod @sbJson, 'GetAsString', @sTmp0 OUT
    EXEC sp_OAMethod @json, 'Load', @success OUT, @sTmp0

    -- Now we can get the JSON array
    DECLARE @jArray int
    EXEC sp_OAMethod @json, 'ArrayAt', @jArray OUT, 0

    -- Do what you want with the JSON array...
    -- For example:
    DECLARE @jObjId int
    EXEC sp_OAMethod @jArray, 'ObjectAt', @jObjId OUT, 0
    EXEC sp_OAMethod @jObjId, 'IntOf', @iTmp0 OUT, 'id'
    PRINT @iTmp0
    EXEC @hr = sp_OADestroy @jObjId

    EXEC @hr = sp_OADestroy @jArray


    EXEC @hr = sp_OADestroy @sbJson
    EXEC @hr = sp_OADestroy @json


END
GO