How to use waitUntilTableNotExists in DynamoDb describe table

Question

I am trying to delete and then create a DynamoDB table using nodejs aws sdk (version 3.142.0) and I wanted to use the waiters (waitUntilTableNotExists / waitUntilTableExists), but I don't understand how they are supposed to be used and I cannot find a good example online.

Regards

Answer 1

Here is one way after a createTable command in aws-sdk-js-v3 to wait for the table to complete. A note is that if you do NOT use waitUntilTableExists and instead attempt to use DescribeTableCommand it will incorrectly report TableStatus == 'ACTIVE' even though you cannot Read/Write to the table, you must use waitUntilTableExists.

import {
  CreateTableCommandInput,
  CreateTableCommandOutput,  
  waitUntilTableExists
} from "@aws-sdk/client-dynamodb";

const client = new DynamoDBClient({ region: "us-east-1" });


const data = await client.send(
      new CreateTableCommand({
        TableName: tableName,
        AttributeDefinitions: partitionAndSortKeyDefinitions,
        KeySchema: columnSchema,
        ProvisionedThroughput: {
          ReadCapacityUnits: 4,
          WriteCapacityUnits: 2,
        },
      })
);


// maxWaitTime - seconds
const results = await waitUntilTableExists({client: client, maxWaitTime: 120}, {TableName: tableName})
if (results.state == 'SUCCESS') {
  return results.reason.Table
}
console.error(`${results.state} ${results.reason}`);