(SQL Server) Load JSON Data at Path

Demonstrates how to load JSON data into a path within a JSON database. For example, we begin with this JSON:

{
  "a": 1,
  "b": 2,
  "c": {
    "x": 1,
    "y": 2
  }
}

{
  "a": 1,
  "b": 2,
  "c": {
    "mm": 11,
    "nn": 22
  }
}

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)
    -- Demonstrates how to load replace the data at a location within a JSON database.

    DECLARE @p nvarchar(4000)
    SELECT @p = '{"a": 1, "b": 2, "c": { "x": 1, "y": 2 } }'

    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, 'Load', @success OUT, @p
    EXEC sp_OASetProperty @json, 'EmitCompact', 0
    EXEC sp_OAMethod @json, 'Emit', @sTmp0 OUT
    PRINT @sTmp0

    DECLARE @q nvarchar(4000)
    SELECT @q = '{"mm": 11, "nn": 22}'

    DECLARE @c int
    EXEC sp_OAMethod @json, 'ObjectOf', @c OUT, 'c'
    EXEC sp_OAMethod @c, 'Load', @success OUT, @q
    EXEC @hr = sp_OADestroy @c

    -- See that x and y are replaced with mm and nn.
    EXEC sp_OAMethod @json, 'Emit', @sTmp0 OUT
    PRINT @sTmp0

    EXEC @hr = sp_OADestroy @json


END
GO