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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.
Dynamic SQL
Determine SQL statementsIf you do not know until run time what SQL statement to execute, you can dynamically determine that statement with the DESCRIBE statement and use a dynamic-management structure to hold any values that the statement sends to or receives from the database server.
Dynamic-management structureIf you do not know the number or data types of values sent to or received from the database server, use a dynamic-management structure. A dynamic-management structure allows you to pass a variable-length list of data to the database server, or receive a variable-length list of data from it.
An sqlda structureThe sqlda structure is a C structure (defined in the sqlda.h header file) that holds data returned from a prepared statement.
Descriptive information

Descriptive information

The following table summarizes the sqlda fields that describe the sqlda structure itself.

Table 1. Descriptive fields in the sqlda structure
Field	Data type	Description
desc_name	char[19]	The name of the descriptor; maximum of 18 characters
desc_occ	short	The size of the sqlda structure
desc_next	struct sqlda *	A pointer to the next sqlda structure

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