/**
* @brief Take the intersection of this TupleIdSequence with another's
* complement (i.e. set difference), modifying this TupleIdSequence
* in-place.
* @warning This TupleIdSequence must be the same length as the other, and
* the set-difference only has semantic meaning if both
* TupleIdSequences refer to tuples in the same block.
*
* @param other Another TupleIdSequence to intersect with the complement of.
**/
inline void intersectWithComplement(const TupleIdSequence &other) {
DEBUG_ASSERT(length() == other.length());
internal_bitvector_.unsetFrom(other.internal_bitvector_);
}
TupleIdSequence* PatternMatchingUncheckedComparator<is_like_pattern, is_negation,
left_nullable, right_nullable>
::compareValueAccessorAndStaticValue(
ValueAccessor *accessor,
const attribute_id value_accessor_attr_id,
const TypedValue &static_value,
const TupleIdSequence *filter) const {
// Specialized implementation for matching a ValueAccessor of strings to a
// single pattern. In this situation, the pattern will be compiled only once
// in advance and then matched by each of the string in the ValueAccessor.
return InvokeOnValueAccessorMaybeTupleIdSequenceAdapter(
accessor,
[&](auto *accessor) -> TupleIdSequence* { // NOLINT(build/c++11)
#ifdef QUICKSTEP_ENABLE_VECTOR_PREDICATE_SHORT_CIRCUIT
static constexpr bool short_circuit = true;
#else
static constexpr bool short_circuit = false;
#endif
TupleIdSequence *result = new TupleIdSequence(accessor->getEndPosition());
if (right_nullable && static_value.isNull()) {
return result;
}
// Transform and compile pattern in advance before the loop.
const char *pattern = static_cast<const char *>(static_value.getDataPtr());
std::string regex_pattern;
re2::StringPiece pattern_piece;
std::size_t orig_pattern_len = strnlen(pattern, right_length_);
if (is_like_pattern) {
regex_pattern = this->transformLikeToRegex(pattern, orig_pattern_len);
pattern_piece.set(regex_pattern.c_str(), regex_pattern.size());
} else {
pattern_piece.set(pattern, orig_pattern_len);
}
const re2::RE2 re2_pattern(pattern_piece);
if (short_circuit && (filter != nullptr)) {
DCHECK_EQ(filter->length(), result->length());
for (TupleIdSequence::const_iterator filter_it = filter->begin();
filter_it != filter->end();
++filter_it) {
const void *va_value
= accessor->template getUntypedValueAtAbsolutePosition<left_nullable>(value_accessor_attr_id,
*filter_it);
result->set(*filter_it,
this->matchDataPtrWithPattern(va_value, re2_pattern));
}
} else {
accessor->beginIteration();
if (accessor->isColumnAccessorSupported()) {
// If ColumnAccessor is supported on the underlying accessor, we have a fast strided
// column accessor available for the iteration on the underlying block.
std::unique_ptr<const ColumnAccessor<left_nullable>>
column_accessor
(accessor->template getColumnAccessor<left_nullable>(value_accessor_attr_id));
DCHECK(column_accessor != nullptr);
while (accessor->next()) {
const void *va_value = column_accessor->getUntypedValue();
result->set(accessor->getCurrentPosition(),
this->matchDataPtrWithPattern(va_value, re2_pattern));
}
} else {
while (accessor->next()) {
const void *va_value
= accessor->template getUntypedValue<left_nullable>(value_accessor_attr_id);
result->set(accessor->getCurrentPosition(),
this->matchDataPtrWithPattern(va_value, re2_pattern));
}
}
if (!short_circuit && (filter != nullptr)) {
result->intersectWith(*filter);
}
}
return result;
});
}
