(SQL Server) Simple REST Example

Demonstrates a very simple RESTful API call to get a stock time series daily (quotes) from Alpha Vantage.

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)
    -- This example requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    DECLARE @rest int
    -- Use "Chilkat_9_5_0.Rest" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Rest', @rest OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Connect to the REST server.
    DECLARE @bTls int
    SELECT @bTls = 1
    DECLARE @port int
    SELECT @port = 443
    DECLARE @bAutoReconnect int
    SELECT @bAutoReconnect = 1
    DECLARE @success int
    EXEC sp_OAMethod @rest, 'Connect', @success OUT, 'www.alphavantage.co', @port, @bTls, @bAutoReconnect
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @rest
        RETURN
      END

    -- Get a stock quote:
    -- Sending GET request to https://www.alphavantage.co/query?function=TIME_SERIES_DAILY&symbol=MSFT&apikey=my_api_key
    EXEC sp_OAMethod @rest, 'AddQueryParam', @success OUT, 'function', 'TIME_SERIES_DAILY'
    EXEC sp_OAMethod @rest, 'AddQueryParam', @success OUT, 'symbol', 'AAPL'
    EXEC sp_OAMethod @rest, 'AddQueryParam', @success OUT, 'apikey', 'my_api_key'
    DECLARE @responseJson nvarchar(4000)
    EXEC sp_OAMethod @rest, 'FullRequestNoBody', @responseJson OUT, 'GET', '/query'
    EXEC sp_OAGetProperty @rest, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @rest
        RETURN
      END


    PRINT @responseJson

    -- Sample response:
    -- {
    --     "Meta Data": {
    --         "1. Information": "Daily Prices (open, high, low, close) and Volumes",
    --         "2. Symbol": "AAPL",
    --         "3. Last Refreshed": "2019-12-06",
    --         "4. Output Size": "Compact",
    --         "5. Time Zone": "US/Eastern"
    --     },
    --     "Time Series (Daily)": {
    --         "2019-12-06": {
    --             "1. open": "267.4800",
    --             "2. high": "271.0000",
    --             "3. low": "267.3000",
    --             "4. close": "270.7100",
    --             "5. volume": "25447644"
    --         },
    --         "2019-12-05": {
    --             "1. open": "263.7900",
    --             "2. high": "265.8900",
    --             "3. low": "262.7300",
    --             "4. close": "265.5800",
    --             "5. volume": "18661343"
    --         },
    --         "2019-12-04": {
    --             "1. open": "261.0700",
    --             "2. high": "263.3100",
    --             "3. low": "260.6800",
    --             "4. close": "261.7400",
    --             "5. volume": "16810388"
    --         },
    -- ...
    --         "2019-07-18": {
    --             "1. open": "204.0000",
    --             "2. high": "205.8800",
    --             "3. low": "203.7000",
    --             "4. close": "205.6600",
    --             "5. volume": "18582161"
    --         }
    --     }
    -- }

    EXEC @hr = sp_OADestroy @rest


END
GO