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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.
What is HCL OneDB™ ESQL/C?
Simple large objectsA simple large object is a large object that is stored in a blobspace on disk and is not recoverable.
Locate simple large objects in memory
Allocate the memory bufferWhen your program selects simple-large-object data into memory, uses a memory buffer.

Allocate the memory buffer

When your program selects simple-large-object data into memory, uses a memory buffer.

Before your program fetches TEXT or BYTE data, you must set the loc_bufsize (lc_union.lc_mem.lc_bufsize) field as follows to indicate how allocates this memory buffer:

If you set the loc_bufsize to -1, allocates the memory buffer to hold the simple-large-object data.
If you set the loc_bufsize to a value that is not -1, assumes that the program handles memory-buffer allocation and deallocation.

Important: When you locate simple large objects in memory, you must always set loc_mflags (lc_union.lc_mem.lc_mflags) and loc_oflags to 0 initially.