Informix Driver: !!exclusive!!

| Isolation Level | Dirty Read | Non-repeatable Read | Phantom Read | |----------------|------------|---------------------|---------------| | Dirty Read | Yes | Yes | Yes | | Committed Read | No | Yes | Yes | | Cursor Stability | No | No (for current row) | Yes | | Repeatable Read | No | No | No | | Last Committed | No | No (but older snapshot) | Yes |

Informix, database driver, ODBC, JDBC, CSDK, connectivity, performance tuning, transaction isolation informix driver

The Informix Driver serves as a critical connectivity bridge between applications and IBM Informix database servers. This paper provides a complete technical examination of the Informix Driver ecosystem, including native (CSDK) interfaces, ODBC, JDBC, .NET, and Python drivers. We analyze architectural patterns, connection management, data type mappings, transaction handling, and performance tuning strategies. Empirical results demonstrate that driver selection and configuration can impact application throughput by up to 40%. The paper concludes with best practices for high-availability and ETL environments. | Isolation Level | Dirty Read | Non-repeatable

using (IfxConnection conn = new IfxConnection("Host=myhost;Database=mydb;User Id=user;Password=pass;Server=ol_informix1170")) including native (CSDK) interfaces

ol_informix1170 onsoctcp primary 9088 ol_informix1170 onsoctcp secondary 9088