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In this video, we are going to describing existing Dynamo DB tables with using the Dynamo DB packets.

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In order to do that, please open the our visual code and I have created separate lecture folder in

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here and follow the same steps.

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What we have done in the last videos is remember that we have installed required DB packets and create

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dynamo db client separate Node.js module and now we will develop our actual code into the describing

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tables command.

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So for that purpose or for that purpose, I have create describe table JavaScript file and create a

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run method with the basic implementation.

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As you remember, that is the structure of our implementation.

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We will make our call in this two step.

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So before this step I would like to search for the describe table command.

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In our API reference documentation, you can come to the dynamic DB client object and search for the

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describe table command.

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If you click these describe table command, we can see the import statement in here.

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We will import dynamo DB, describe table command and this is the usage.

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And we can also see how we can send input parameters and get the outputs in these objects.

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Please click the describe table command input and see that we should provide the table name as a property

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of this command.

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So I'm going to send the request for the describe table command and send the table name as a parameter

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of this command.

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So please open the OR we just record and come to implementation part.

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Now we are going to implement our logic, which is the sending request to the describe table command.

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In order to do that, I'm going to copy and paste this line of code.

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This is the or core line of the code which basically using the client object and assigned the describe

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table command.

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So let's record import statements in our application, okay?

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If you come this line of code and come to control space and click the first result, you can see that

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we have successfully import describe table command from the our dynamic DB SDK and it's the same way

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we should import dynamo DB client module which comes from the our.

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Object.

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You can see in here.

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I have saved the file and come here and again put the input statement, click that JS file.

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Okay, very good.

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Now we have imported required statement and it is time to invoke these.

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Describe table command.

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Please open the terminal and go to correct folder structure and run the node command.

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So I'm going to run the node.

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Scrap table.

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JS So hit the answer and see the result.

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So as you can see that we've got the parameters we have to add the parameters for our case parameters

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should be include a table name for that purpose before running the our method.

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Come here and create a parameters object in here.

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And we basically placing the table name.

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Our table name is order.

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So after defining the parameters, we passing the parameters to the described table command.

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If you come to our terminal and run our node command again.

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See that this time we will get describing documentation of the table or table definition and all properties,

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including in this JSON file that we can successfully run.

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Describe command and get back response from the Dynamo DB.