SQL Server

Sort JSON Object by Member Key Name

See more JSON Examples

Demonstrates how to sort the members of a JSON object by the key name. 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)
    DECLARE @json int
    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, 'UpdateString', @success OUT, 'xyz', '1234'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'abc.xyz', '1234'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'abc.def', '1234'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'abc.aaa', '1234'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'ghi', '1234'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'nmo', '1234'

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

    -- This is our initial JSON:

    -- {
    --   "xyz": "1234",
    --   "abc": {
    --     "xyz": "1234",
    --     "def": "1234",
    --     "aaa": "1234"
    --   },
    --   "ghi": "1234",
    --   "nmo": "1234"
    -- }

    -- Sort the top-level JSON object by key.
    DECLARE @ascending int
    SELECT @ascending = 1
    DECLARE @caseSensitive int
    SELECT @caseSensitive = 1
    EXEC sp_OAMethod @json, 'Sort', NULL, @ascending, @caseSensitive

    -- Look at the sorted JSON..
    EXEC sp_OAMethod @json, 'Emit', @sTmp0 OUT
    PRINT @sTmp0

    -- {
    --   "abc": {
    --     "xyz": "1234",
    --     "def": "1234",
    --     "aaa": "1234"
    --   },
    --   "ghi": "1234",
    --   "nmo": "1234",
    --   "xyz": "1234"
    -- }

    -- Now sort the members of the "abc" object..
    DECLARE @jsonAbc int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @jsonAbc OUT

    EXEC sp_OAMethod @json, 'ObjectOf2', @success OUT, 'abc', @jsonAbc

    EXEC sp_OAMethod @jsonAbc, 'Sort', NULL, @ascending, @caseSensitive

    -- Now look at the JSON with the members under "abc" also sorted..
    EXEC sp_OAMethod @json, 'Emit', @sTmp0 OUT
    PRINT @sTmp0

    -- {
    --   "abc": {
    --     "aaa": "1234",
    --     "def": "1234",
    --     "xyz": "1234"
    --   },
    --   "ghi": "1234",
    --   "nmo": "1234",
    --   "xyz": "1234"
    -- }

    EXEC @hr = sp_OADestroy @json
    EXEC @hr = sp_OADestroy @jsonAbc


END
GO