Method compileRelation

src/jrd/optimizer/Optimizer.cpp:1222–1257

//

void Optimizer::compileRelation(StreamType stream)
{
	// We have found a base relation; record its stream number in the streams array
	// as a candidate for merging into a river

	compileStreams.add(stream);

	// If we have any booleans or sort fields, we may be able to
	// use an index to optimize them; retrieve the current format of
	// all indices at this time so we can determine if it's possible

	const bool needIndices = conjuncts.hasData() || (rse->rse_sorted || rse->rse_aggregate);

	const auto tail = &csb->csb_rpt[stream];

	const auto relation = tail->csb_relation;
	fb_assert(relation);

	tail->csb_idx = nullptr;

	if (needIndices && !relation->rel_file && !relation->isVirtual())
	{
		const auto relPages = relation->getPages(tdbb);
		IndexDescList idxList;
		BTR_all(tdbb, relation, idxList, relPages);

		if (idxList.hasData())
			tail->csb_idx = FB_NEW_POOL(getPool()) IndexDescList(getPool(), idxList);

		if (tail->csb_plan)
			markIndices(tail, relation->rel_id);
	}

	const auto format = CMP_format(tdbb, csb, stream);
	tail->csb_cardinality = getCardinality(tdbb, relation, format);
}


//