TupleIdSequence* TupleStorageSubBlock::getMatchesForPredicate(const Predicate *pred) const {
TupleIdSequence *matches = new TupleIdSequence();
tuple_id max_tid = getMaxTupleID();
if (pred == NULL) {
if (isPacked()) {
for (tuple_id tid = 0; tid <= max_tid; ++tid) {
matches->append(tid);
}
} else {
for (tuple_id tid = 0; tid <= max_tid; ++tid) {
if (hasTupleWithID(tid)) {
matches->append(tid);
}
}
}
} else {
if (isPacked()) {
for (tuple_id tid = 0; tid <= max_tid; ++tid) {
if (pred->matchesForSingleTuple(*this, tid)) {
matches->append(tid);
}
}
} else {
for (tuple_id tid = 0; tid <= max_tid; ++tid) {
if (hasTupleWithID(tid) && (pred->matchesForSingleTuple(*this, tid))) {
matches->append(tid);
}
}
}
}
return matches;
}
TupleIdSequence* CompressedPackedRowStoreTupleStorageSubBlock::getCodesInRange(
const attribute_id attr_id,
const std::pair<std::uint32_t, std::uint32_t> range) const {
TupleIdSequence *matches = new TupleIdSequence();
const char *attr_location = static_cast<const char*>(tuple_storage_)
+ attribute_offsets_[attr_id];
switch (compression_info_.attribute_size(attr_id)) {
case 1:
for (tuple_id tid = 0;
tid < *static_cast<const tuple_id*>(sub_block_memory_);
++tid, attr_location += tuple_length_bytes_) {
if (range.first <= (*reinterpret_cast<const uint8_t*>(attr_location))
&& (*reinterpret_cast<const uint8_t*>(attr_location) < range.second)) {
matches->append(tid);
}
}
break;
case 2:
for (tuple_id tid = 0;
tid < *static_cast<const tuple_id*>(sub_block_memory_);
++tid, attr_location += tuple_length_bytes_) {
if (range.first <= (*reinterpret_cast<const uint16_t*>(attr_location))
&& (*reinterpret_cast<const uint16_t*>(attr_location) < range.second)) {
matches->append(tid);
}
}
break;
case 4:
for (tuple_id tid = 0;
tid < *static_cast<const tuple_id*>(sub_block_memory_);
++tid, attr_location += tuple_length_bytes_) {
if (range.first <= (*reinterpret_cast<const uint32_t*>(attr_location))
&& (*reinterpret_cast<const uint32_t*>(attr_location) < range.second)) {
matches->append(tid);
}
}
break;
default:
FATAL_ERROR("Unexpected byte-length (not 1, 2, or 4) for compressed "
"attribute ID " << attr_id
<< " in CompressedPackedRowStoreTupleStorageSubBlock::getCodesInRange()");
}
return matches;
}
TupleIdSequence* SortColumnPredicateEvaluator::EvaluatePredicateForUncompressedSortColumn(
const Predicate &predicate,
const CatalogRelation &relation,
const attribute_id sort_attribute_id,
void *sort_attribute_stripe,
const tuple_id num_tuples) {
// Determine if the predicate is a comparison of the sort column with a literal.
if (predicate.isAttributeLiteralComparisonPredicate()) {
const ComparisonPredicate &comparison_predicate = static_cast<const ComparisonPredicate&>(predicate);
const CatalogAttribute *comparison_attribute = NULL;
bool left_literal = false;
if (comparison_predicate.getLeftOperand().hasStaticValue()) {
DEBUG_ASSERT(comparison_predicate.getRightOperand().getDataSource() == Scalar::kAttribute);
comparison_attribute
= &(static_cast<const ScalarAttribute&>(comparison_predicate.getRightOperand()).getAttribute());
left_literal = true;
} else {
DEBUG_ASSERT(comparison_predicate.getLeftOperand().getDataSource() == Scalar::kAttribute);
comparison_attribute
= &(static_cast<const ScalarAttribute&>(comparison_predicate.getLeftOperand()).getAttribute());
left_literal = false;
}
DEBUG_ASSERT(comparison_attribute->getParent().getID() == relation.getID());
if (comparison_attribute->getID() == sort_attribute_id) {
const LiteralTypeInstance* comparison_literal;
if (left_literal) {
comparison_literal = &(comparison_predicate.getLeftOperand().getStaticValue());
} else {
comparison_literal = &(comparison_predicate.getRightOperand().getStaticValue());
}
// NOTE(chasseur): A standards-compliant implementation of lower_bound
// always compares the iterator on the left with the literal on the right,
// while upper_bound compares the literal on the left with the iterator
// on the right. These will work even if comparison_attribute and
// comparison_literal are different types.
const Comparison &less_comparison = Comparison::GetComparison(Comparison::kLess);
ScopedPtr<UncheckedComparator> fast_comparator_lower(
less_comparison.makeUncheckedComparatorForTypes(comparison_attribute->getType(),
comparison_literal->getType()));
STLUncheckedComparatorWrapper comp_lower(*fast_comparator_lower);
ScopedPtr<UncheckedComparator> fast_comparator_upper(
less_comparison.makeUncheckedComparatorForTypes(comparison_literal->getType(),
comparison_attribute->getType()));
STLUncheckedComparatorWrapper comp_upper(*fast_comparator_upper);
// Find the bounds on the range of matching tuples.
tuple_id min_match = 0;
tuple_id max_match_bound = num_tuples;
ColumnStripeIterator begin_it(sort_attribute_stripe,
relation.getAttributeById(sort_attribute_id).getType().maximumByteLength(),
0);
ColumnStripeIterator end_it(sort_attribute_stripe,
relation.getAttributeById(sort_attribute_id).getType().maximumByteLength(),
num_tuples);
switch (comparison_predicate.getComparison().getComparisonID()) {
case Comparison::kEqual:
// Note: There is a special branch below for kNotEqual which takes the
// complement of the matched range.
case Comparison::kNotEqual:
min_match = lower_bound(begin_it,
end_it,
comparison_literal->getDataPtr(),
comp_lower).getTuplePosition();
max_match_bound = upper_bound(begin_it,
end_it,
comparison_literal->getDataPtr(),
comp_upper).getTuplePosition();
break;
case Comparison::kLess:
if (left_literal) {
min_match = upper_bound(begin_it,
end_it,
comparison_literal->getDataPtr(),
comp_upper).getTuplePosition();
} else {
max_match_bound = lower_bound(begin_it,
end_it,
comparison_literal->getDataPtr(),
comp_lower).getTuplePosition();
}
break;
case Comparison::kLessOrEqual:
if (left_literal) {
min_match = lower_bound(begin_it,
end_it,
comparison_literal->getDataPtr(),
comp_lower).getTuplePosition();
} else {
max_match_bound = upper_bound(begin_it,
end_it,
comparison_literal->getDataPtr(),
comp_upper).getTuplePosition();
}
break;
case Comparison::kGreater:
if (left_literal) {
max_match_bound = lower_bound(begin_it,
end_it,
comparison_literal->getDataPtr(),
comp_lower).getTuplePosition();
} else {
min_match = upper_bound(begin_it,
end_it,
comparison_literal->getDataPtr(),
comp_upper).getTuplePosition();
}
break;
case Comparison::kGreaterOrEqual:
if (left_literal) {
max_match_bound = upper_bound(begin_it,
end_it,
comparison_literal->getDataPtr(),
comp_upper).getTuplePosition();
} else {
min_match = lower_bound(begin_it,
end_it,
comparison_literal->getDataPtr(),
comp_lower).getTuplePosition();
}
break;
default:
FATAL_ERROR("Unknown Comparison in SortColumnPredicateEvaluator::"
"EvaluatePredicateForUncompressedSortColumn()");
}
// Create and return the sequence of matches.
TupleIdSequence *matches = new TupleIdSequence();
if (comparison_predicate.getComparison().getComparisonID() == Comparison::kNotEqual) {
// Special case: return all tuples NOT in the range for kEqual.
for (tuple_id tid = 0; tid < min_match; ++tid) {
matches->append(tid);
}
for (tuple_id tid = max_match_bound; tid < num_tuples; ++tid) {
matches->append(tid);
}
} else {
for (tuple_id tid = min_match; tid < max_match_bound; ++tid) {
matches->append(tid);
}
}
return matches;
} else {
return NULL;
}
} else {
// Can not evaluate a non-comparison predicate, so pass through.
return NULL;
}
}
