FAQ

Metering and Billing FAQs

What are the billing differences between Document Databases and MySQL databases?

• Document Databases: Metering includes API calls and data storage usage
• MySQL Database: Metering includes compute resource usage and storage usage

Note

When using data models on both databases, calls to the data models will also record the number of API calls.

Usage-Related FAQs

Query conditions are correct but results are empty

When using database queries, if empty results are returned, there are usually two situations:

1. No data matches the query conditions
2. Data is filtered by permission control

Troubleshooting Methods

1. Confirm data existence

   • Check directly in the CloudBase console whether the target data exists in the collection
   • Verify that the creation time and field values of the data meet expectations

2. Check permission configuration

   • Check whether the basic permission settings of the collection allow the current user to read
   • Database read/write operations use the _openid field to determine data ownership
   • If using security rules, verify that the rule expressions are correct
   • Confirm that the query conditions include the necessary fields required by security rules

3. Verify query conditions

   • Simplify query conditions and gradually troubleshoot which condition causes empty results
   • Check whether field names, data types, and query syntax are correct