(SQL Server) Swap JSON Objects

Demonstrates how to swap two JSON objects within a JSON document.

Note: This example requires Chilkat v11.0.0 or greater.

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)
    DECLARE @success int
    SELECT @success = 0

    DECLARE @json int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @json OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    EXEC sp_OASetProperty @json, 'EmitCompact', 0

    -- Load the following JSON:

    -- {
    --   "petter": {
    --     "DOB": "26/02/1986",
    --     "gender": "male",
    --     "country": "US"
    --   },
    --   "Sara": {
    --     "DOB": "13/05/1982",
    --     "gender": "female",
    --     "country": "FR"
    --   },
    --   "Jon": {
    --     "DOB": "19/03/1984",
    --     "gender": "male",
    --     "country": "UK"
    --   }
    -- }

    EXEC sp_OAMethod @json, 'LoadFile', @success OUT, 'qa_data/json/people.json'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @json, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @json
        RETURN
      END

    -- Swap the positions of Jon and Sara.
    DECLARE @index1 int
    EXEC sp_OAMethod @json, 'IndexOf', @index1 OUT, 'Jon'
    DECLARE @index2 int
    EXEC sp_OAMethod @json, 'IndexOf', @index2 OUT, 'Sara'
    EXEC sp_OAMethod @json, 'Swap', @success OUT, @index1, @index2

    -- We have this now:
    EXEC sp_OAMethod @json, 'Emit', @sTmp0 OUT
    PRINT @sTmp0

    -- {
    --   "petter": {
    --     "DOB": "26/02/1986",
    --     "gender": "male",
    --     "country": "US"
    --   },
    --   "Jon": {
    --     "DOB": "19/03/1984",
    --     "gender": "male",
    --     "country": "UK"
    --   },
    --   "Sara": {
    --     "DOB": "13/05/1982",
    --     "gender": "female",
    --     "country": "FR"
    --   }
    -- }

    -- To swap an inner member:

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

    EXEC sp_OAMethod @json, 'ObjectOf2', @success OUT, 'Sara', @jsonSara

    EXEC sp_OAMethod @jsonSara, 'IndexOf', @index1 OUT, 'DOB'
    EXEC sp_OAMethod @jsonSara, 'IndexOf', @index2 OUT, 'country'
    EXEC sp_OAMethod @jsonSara, 'Swap', @success OUT, @index1, @index2

    -- We now have this:
    EXEC sp_OAMethod @json, 'Emit', @sTmp0 OUT
    PRINT @sTmp0

    -- {
    --   "petter": {
    --     "DOB": "26/02/1986",
    --     "gender": "male",
    --     "country": "US"
    --   },
    --   "Jon": {
    --     "DOB": "19/03/1984",
    --     "gender": "male",
    --     "country": "UK"
    --   },
    --   "Sara": {
    --     "country": "FR",
    --     "gender": "female",
    --     "DOB": "13/05/1982"
    --   }
    -- }

    EXEC @hr = sp_OADestroy @json
    EXEC @hr = sp_OADestroy @jsonSara


END
GO