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

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Isolation and Lock Levels Supported

PostgreSQL supports isolation level 0 (read uncommitted), level 1 (read committed), 2 (Repeatable read), and level 3 (serializable). PostgreSQL supports record-level locking.
Refer to "Locking and Isolation Levels" in the DataDirect Connect Series for ODBC Reference for details.