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Gets a binary chunk from the column.
public virtual size_t GetByteChunk(
const char * cname,
ul_byte * dst,
The name of the column.
The buffer to hold the bytes.
The size of the buffer in bytes.
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.