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Drivers for 32-Bit and 64-Bit Platforms : The Informix Wire Protocol Driver : Isolation and Lock Levels Supported
 

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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.