Gets a binary chunk from the column.
public virtual size_t GetByteChunk( ul_column_num cid, ul_byte * dst, size_t len, size_t offset )
cid The 1-based ordinal column number.
dst The buffer to hold the bytes.
len The size of the buffer in bytes.
offset The offset into the value at which to start reading or UL_BLOB_CONTINUE to continue from where the last read ended.
The number of bytes copied to the destination buffer. If dst is NULL, the number of bytes left is returned.
The end of the value has been reached if 0 is returned.
Syntax