What is the WordPress `wpdb::last_error` and `SAVEPOINTDB` pattern for nested database transactions?

WordPress Expert Hard

WordPress Expert — Hard

What is the WordPress `wpdb::last_error` and `SAVEPOINTDB` pattern for nested database transactions?

Key points

  • WordPress doesn't abstract transactions
  • SAVEPOINT creates named savepoints for partial rollback
  • Manual transaction handling required in WordPress
  • Checking $wpdb->last_error crucial for error handling

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