Home
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.
What is HCL OneDB™ ESQL/C?
Compile programs
The esql command

The esql command

To create an executable C program from HCL OneDB™ ESQL/C source files, use the esql command. The HCL® OneDB installation script installs the esql command as part of the HCL OneDB ESQL/C product. This section describes what the esql command can do and how you use it.

The esql command performs the following steps:

Converts the embedded SQL statements to C language code.
Converts your ESQL/C source files to C language source files.
Compiles the files that result with the C compiler to create an object file.
Creates the resource compiler and links any resource files (.res) that you specify on the esql command line for Windows™.
Links the object file with the HCL OneDB ESQL/C libraries and your own libraries.