@Override
public PlanNode rewriteTableScan(TableScanNode node, Expression inheritedPredicate, PlanRewriter<Expression> planRewriter)
{
DomainTranslator.ExtractionResult extractionResult = DomainTranslator.fromPredicate(inheritedPredicate, symbolAllocator.getTypes(), node.getAssignments());
Expression extractionRemainingExpression = extractionResult.getRemainingExpression();
TupleDomain tupleDomain = extractionResult.getTupleDomain();
if (node.getGeneratedPartitions().isPresent()) {
// Add back in the TupleDomain that was used to generate the previous set of Partitions if present
// And just for kicks, throw in the domain summary too (as that can only help prune down the ranges)
// The domains should never widen between each pass.
tupleDomain = tupleDomain.intersect(node.getGeneratedPartitions().get().getTupleDomainInput()).intersect(node.getPartitionsDomainSummary());
}
Stopwatch partitionTimer = Stopwatch.createStarted();
PartitionResult matchingPartitions = splitManager.getPartitions(node.getTable(), Optional.of(tupleDomain));
List<Partition> partitions = matchingPartitions.getPartitions();
TupleDomain undeterminedTupleDomain = matchingPartitions.getUndeterminedTupleDomain();
log.debug("Partition retrieval, table %s (%d partitions): %dms", node.getTable(), partitions.size(), partitionTimer.elapsed(TimeUnit.MILLISECONDS));
Expression unevaluatedDomainPredicate = DomainTranslator.toPredicate(undeterminedTupleDomain, ImmutableBiMap.copyOf(node.getAssignments()).inverse());
// Construct the post scan predicate. Add the unevaluated TupleDomain back first since those are generally cheaper to evaluate than anything we can't extract