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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 topics explain how to use HCL OneDB™ ESQL/C, the HCL OneDB™ implementation of Embedded Structured Query Language (SQL) for C (ESQL/C), to create client applications with database-management capabilities. The HCL® OneDB® ESQL/C Programmer's Manual explains how to use HCL OneDB™ ESQL/C, 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
HCL OneDB™ librariesThese topics describe how to link the static, shared, and thread-safe HCL OneDB™ general libraries with your HCL OneDB™ ESQL/C application.
Create thread-safe ESQL/C applications
Program a thread-safe ESQL/C applicationThis section provides useful hints for how to create thread-safe HCL OneDB™ ESQL/C applications.
DCE restrictions (UNIX™)
The fork() operating-system call

The fork() operating-system call

In the DCE environment, restrict use of the fork() operating-system call. In general, terminate all threads but one before you call fork(). An exception to this rule is when a call to the fork() system call immediately follows the fork() call. If your application uses fork(), it is recommended that the child process call sqldetach() before it executes any HCL OneDB™ ESQL/C statements.