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Client APIs and toolsYou can use the HCL OneDB™ implementation of client APIs to develop applications for HCL OneDB™ database servers.
ESQL/C GuideThe HCL OneDB™ ESQL/C Programmer's Manual explains how to use , the HCL OneDB™ 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 HCL® OneDB® ESQL/C program can interact with a database server.
Interact with the database server

Interact with the database server

Within your program, you can interact with the database server in the following ways:

Start a new database server process. This process does not exist when an application begins execution.
Switch between multiple connections. An application can establish several connections.
Identify an explicit connection. An application can obtain the name of the database server and connection.
Identify the databases that the database server of the current connection can access.
Check on the status of the database server process. For some actions the database server must be busy, for others the database server must be idle.
Detaching from the current connection. An application must detach a child process from the current connection.
Interrupt the database server process. If an SQL request executes for a long time, the application can interrupt it.
Terminate the database server process. The application can close an unused connection to free resources.