Function isProbeSideQualified

src/optimizer/acc_hash_join_optimizer.cpp:147–154

Probe side is qualified if it is selective.

// Probe side is qualified if it is selective.
static bool isProbeSideQualified(LogicalOperator* probeRoot) {
    if (probeRoot->getOperatorType() == LogicalOperatorType::ACCUMULATE) {
        // No Acc hash join if probe side has already been accumulated. This can be solved.
        return false;
    }
    // Probe side is not selective. So we don't apply acc hash join.
    return subPlanContainsFilter(probeRoot);
}

// Find all ScanNodeIDs under root which scans parameter nodeID. Note that there might be
// multiple ScanNodeIDs matches because both node and rel table scans will trigger scanNodeIDs.