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Client APIs and toolsYou can use the HCL Informix® implementation of client APIs to develop applications for Informix® database servers.
ESQL/C GuideThe Informix® ESQL/C Programmer's Manual explains how to use Informix® ESQL/C, the Informix® implementation of Embedded Structured Query Language (SQL) for C (ESQL/C), to create client applications with database-management capabilities.
Database server communication
Working with the database serverThese topics explain how the Informix® ESQL/C program can interact with a database server.
The client-server connectionThe Informix® ESQL/C application can establish a connection to any valid database environment. A database environment can be a database, a database server, or a database and a database server.
Connect to a database server
Multiplexed connections
Limitations for multiplexed connections

Limitations for multiplexed connections

Informix® ESQL/C imposes the following limitations on multiplexed connections:

Shared memory connections are not supported.
Multithreaded applications are not supported.
The database server ignores the sqlbreak() function on a multiplexed connection. If you call it, the database server does not interrupt the connection and does not return an error.

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