Part 2: The 32-Bit/64-Bit Drivers : The Informix Wire Protocol Driver : Isolation and Lock Levels Supported

Isolation and Lock Levels Supported
Informix supports isolation levels 0 (read uncommitted), 1 (read committed), and 3 (serializable). The default is 1. Informix supports record-level locking.
Refer to "Locking and Isolation Levels" in the DataDirect Connect Series for ODBC Reference for details.

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