Method putExtBlob

src/jrd/extds/ExtDS.cpp:2471–2512

read local blob, store it as external blob and put external blob_id in dst

// read local blob, store it as external blob and put external blob_id in dst
void Statement::putExtBlob(thread_db* tdbb, dsc& src, dsc& dst)
{
	blb* srcBlob = NULL;
	AutoPtr<Blob> extBlob(m_connection.createBlob());
	try
	{
		extBlob->create(tdbb, *m_transaction, dst, NULL);

		Request* request = tdbb->getRequest();
		bid* srcBid = (bid*) src.dsc_address;

		UCharBuffer bpb;
		BLB_gen_bpb_from_descs(&src, &dst, bpb);
		srcBlob = blb::open2(tdbb, request->req_transaction, srcBid, bpb.getCount(), bpb.begin());

		HalfStaticArray<UCHAR, 2048> buffer;
		const int bufSize = srcBlob->getMaxSegment();
		UCHAR* buff = buffer.getBuffer(bufSize);

		while (true)
		{
			USHORT length = srcBlob->BLB_get_segment(tdbb, buff, srcBlob->getMaxSegment());
			if (srcBlob->blb_flags & BLB_eof) {
				break;
			}

			extBlob->write(tdbb, buff, length);
		}

		srcBlob->BLB_close(tdbb);
		srcBlob = NULL;
		extBlob->close(tdbb);
	}
	catch (const Exception&)
	{
		if (srcBlob) {
			srcBlob->BLB_close(tdbb);
		}
		extBlob->cancel(tdbb);
		throw;
	}
}

void Statement::clearNames()
{