1. Cost in Euros and Currency Conversion through API
To calculate the cost in euros, you need to convert the cost from USD to EUR using the current exchange rate. Unfortunately, BigQuery does not provide cost calculations in different currencies directly through its API. You will need to use an external currency conversion API to get the current exchange rate and apply it to the cost in USD.
Here’s how you can handle it:
-
Fetch Exchange Rates: Use an external API like ExchangeRate-API or Open Exchange Rates to get the current USD to EUR conversion rate.
-
Apply Conversion: Convert the cost from USD to EUR using the fetched exchange rate.
Here's how you can integrate currency conversion:
import java.net.HttpURLConnection;
import java.net.URL;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import org.json.JSONObject;
public class CurrencyConverter {
public static double getUsdToEurRate() throws Exception {
String apiKey = "YOUR_API_KEY"; // Replace with your API key
URL url = new URL("https://api.exchangerate-api.com/v4/latest/USD?apiKey=" + apiKey);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String inputLine;
StringBuilder content = new StringBuilder();
while ((inputLine = in.readLine()) != null) {
content.append(inputLine);
}
in.close();
JSONObject json = new JSONObject(content.toString());
return json.getJSONObject("rates").getDouble("EUR");
}
public static void main(String[] args) {
try {
double usdToEurRate = getUsdToEurRate();
System.out.printf("Current USD to EUR rate: %.4f\n", usdToEurRate);
// Assume costInUsd is calculated from the dry run
double costInUsd = 0.00488;
double costInEur = costInUsd * usdToEurRate;
System.out.printf("Estimated cost in EUR: %.4f\n", costInEur);
} catch (Exception e) {
e.printStackTrace();
}
}
}
2. Access Permissions for Job Statistics
To get the values for JobStatistics.QueryStatistics fields, your service account needs appropriate permissions. Here are the key permissions and roles required:
Granting Permissions
Use the Google Cloud Console or gcloud command-line tool to grant permissions:
Via Console:
-
Go to the IAM & Admin page in the Google Cloud Console.
-
Select your project.
-
Click on the service account.
-
Click "Edit" and then "Add another role."
-
Add the BigQuery Job User and BigQuery Data Viewer roles.
Via gcloud:
gcloud projects add-iam-policy-binding PROJECT_ID \ --member="serviceAccount:SERVICE_ACCOUNT_EMAIL" \ --role="roles/bigquery.jobUser"
gcloud projects add-iam-policy-binding PROJECT_ID \ --member="serviceAccount:SERVICE_ACCOUNT_EMAIL" \ --role="roles/bigquery.dataViewer"
3. TotalBytesBilled vs TotalBytesProcessed
-
getTotalBytesProcessed(): This field shows the amount of data your query processes. It’s useful for understanding the scope of the query but does not account for free tier or billing policies.
-
getTotalBytesBilled(): This field indicates the amount of data billed for the query. It includes only the data that counts towards billing, accounting for any free tier, rounding policies, or minimum billing requirements.
Which to Use for Cost Calculation:
Example of Retrieving Job Statistics
Here’s how you might retrieve and use these statistics in Java:
Job job = bigquery.create(JobInfo.of(queryConfig));
job = job.waitFor();
if (job != null && job.getStatus().getError() == null) {
JobStatistics.QueryStatistics stats = job.getStatistics();
Long totalBytesBilled = stats.getTotalBytesBilled();
Long totalBytesProcessed = stats.getTotalBytesProcessed();
System.out.printf("Total Bytes Processed: %d\n", totalBytesProcessed);
System.out.printf("Total Bytes Billed: %d\n", totalBytesBilled);
// Calculate cost in USD
double costPerTB = 5.0; // USD
double costInUsd = (totalBytesBilled / (double) (1L << 40)) * costPerTB;
System.out.printf("Estimated cost in USD: %.6f\n", costInUsd);
// Convert to EUR as needed
} else {
System.out.println("Error: " + job.getStatus().getError().toString());
}
LinkedIn
Twitter
