How are commits managed when using the SOAP API in Salesforce?

When using the SOAP API in Salesforce, data commits are managed in such a way that only records without errors are committed. This means that if a batch of records is being processed and some of them encounter issues or violations of data validation rules, those problematic records will not be saved to the database. However, any records that are valid and do not have errors will be committed successfully.

This behavior is crucial for maintaining data integrity. It ensures that valid data is not lost in the event of a failure due to data issues. If a bulk operation is being performed, Salesforce will attempt to save each record, and upon encountering an error, it will skip that particular record while committing others that are error-free.

The other options describe scenarios that do not align with how Salesforce manages commits. For example, automatic committing of all records regardless of errors would lead to invalid data being stored, undermining the reliability of the database. Similarly, rolling back all changes regardless of errors would negate any successful operations, leading to inefficiency and loss of valid data. Thus, the approach of committing only valid records while rejecting those with errors strikes a balance between integrity and functionality.