API Reference 5. WPostgreSQL Class 6. Connection Management 6.1. Connection Managers 6.2. Transactions 7. Table Sync 8. Exceptions WPostgreSQLError ConnectionError TableSyncError ValidationError OperationError SQLInjectionError TransactionError 8.1. Exception Hierarchy 8.2. Usage Example 9. Query Builder validate_identifier() QueryBuilder 9.1. Usage