SQL Server

Insert JSON Object into another JSON Object

See more JSON Examples

Demonstrates how to insert one JSON object into another. Effectively, the JSON object must be copied into the other.. 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)
    -- Imagine we have two separate JSON objects.
    DECLARE @jsonA int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @jsonA OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @success int
    EXEC sp_OAMethod @jsonA, 'UpdateString', @success OUT, 'animal', 'zebra'
    EXEC sp_OAMethod @jsonA, 'UpdateString', @success OUT, 'colors[0]', 'white'
    EXEC sp_OAMethod @jsonA, 'UpdateString', @success OUT, 'colors[1]', 'black'

    EXEC sp_OASetProperty @jsonA, 'EmitCompact', 0
    EXEC sp_OAMethod @jsonA, 'Emit', @sTmp0 OUT
    PRINT @sTmp0

    -- jsonA contains:

    -- {
    --   "animal": "zebra",
    --   "colors": [
    --     "white",
    --     "black"
    --   ]
    -- }

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

    EXEC sp_OAMethod @jsonB, 'UpdateString', @success OUT, 'type', 'mammal'
    EXEC sp_OAMethod @jsonB, 'UpdateBool', @success OUT, 'carnivore', 0

    EXEC sp_OASetProperty @jsonB, 'EmitCompact', 0
    EXEC sp_OAMethod @jsonB, 'Emit', @sTmp0 OUT
    PRINT @sTmp0

    -- jsonB contains:

    -- {
    --   "type": "mammal",
    --   "carnivore": false
    -- }

    -- Let's say we want to insert jsonB into jsonA to get this:

    -- {
    --   "animal": "zebra",
    --   "info" " {
    --       "type": "mammal",
    --       "carnivore": false
    -- 	},
    --   "colors": [
    --     "white",
    --     "black"
    --   ]
    -- }

    EXEC sp_OAMethod @jsonA, 'AddObjectCopyAt', @success OUT, 1, 'info', @jsonB

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

    -- The result is this:

    -- {
    --   "animal": "zebra",
    --   "info": {
    --     "type": "mammal",
    --     "carnivore": false
    --   },
    --   "colors": [
    --     "white",
    --     "black"
    --   ]
    -- }

    EXEC @hr = sp_OADestroy @jsonA
    EXEC @hr = sp_OADestroy @jsonB


END
GO