ClickHouse/dbms/src/Dictionaries/ComplexKeyHashedDictionary.cpp
2017-06-08 15:00:11 +03:00

547 lines
21 KiB
C++

#include <ext/map.h>
#include <ext/range.h>
#include <Dictionaries/ComplexKeyHashedDictionary.h>
#include <Dictionaries/DictionaryBlockInputStream.h>
namespace DB
{
namespace ErrorCodes
{
extern const int TYPE_MISMATCH;
extern const int ARGUMENT_OUT_OF_BOUND;
extern const int BAD_ARGUMENTS;
extern const int DICTIONARY_IS_EMPTY;
}
ComplexKeyHashedDictionary::ComplexKeyHashedDictionary(
const std::string & name, const DictionaryStructure & dict_struct, DictionarySourcePtr source_ptr,
const DictionaryLifetime dict_lifetime, bool require_nonempty)
: name{name}, dict_struct(dict_struct), source_ptr{std::move(source_ptr)}, dict_lifetime(dict_lifetime),
require_nonempty(require_nonempty)
{
createAttributes();
try
{
loadData();
calculateBytesAllocated();
}
catch (...)
{
creation_exception = std::current_exception();
}
creation_time = std::chrono::system_clock::now();
}
ComplexKeyHashedDictionary::ComplexKeyHashedDictionary(const ComplexKeyHashedDictionary & other)
: ComplexKeyHashedDictionary{other.name, other.dict_struct, other.source_ptr->clone(), other.dict_lifetime, other.require_nonempty}
{
}
#define DECLARE(TYPE)\
void ComplexKeyHashedDictionary::get##TYPE(\
const std::string & attribute_name, const Columns & key_columns, const DataTypes & key_types,\
PaddedPODArray<TYPE> & out) const\
{\
dict_struct.validateKeyTypes(key_types);\
\
const auto & attribute = getAttribute(attribute_name);\
if (!isAttributeTypeConvertibleTo(attribute.type, AttributeUnderlyingType::TYPE))\
throw Exception{\
name + ": type mismatch: attribute " + attribute_name + " has type " + toString(attribute.type),\
ErrorCodes::TYPE_MISMATCH};\
\
const auto null_value = std::get<TYPE>(attribute.null_values);\
\
getItemsNumber<TYPE>(attribute, key_columns,\
[&] (const std::size_t row, const auto value) { out[row] = value; },\
[&] (const std::size_t) { return null_value; });\
}
DECLARE(UInt8)
DECLARE(UInt16)
DECLARE(UInt32)
DECLARE(UInt64)
DECLARE(Int8)
DECLARE(Int16)
DECLARE(Int32)
DECLARE(Int64)
DECLARE(Float32)
DECLARE(Float64)
#undef DECLARE
void ComplexKeyHashedDictionary::getString(
const std::string & attribute_name, const Columns & key_columns, const DataTypes & key_types,
ColumnString * out) const
{
dict_struct.validateKeyTypes(key_types);
const auto & attribute = getAttribute(attribute_name);
if (!isAttributeTypeConvertibleTo(attribute.type, AttributeUnderlyingType::String))
throw Exception{
name + ": type mismatch: attribute " + attribute_name + " has type " + toString(attribute.type),
ErrorCodes::TYPE_MISMATCH};
const auto & null_value = StringRef{std::get<String>(attribute.null_values)};
getItemsImpl<StringRef, StringRef>(attribute, key_columns,
[&] (const std::size_t row, const StringRef value) { out->insertData(value.data, value.size); },
[&] (const std::size_t) { return null_value; });
}
#define DECLARE(TYPE)\
void ComplexKeyHashedDictionary::get##TYPE(\
const std::string & attribute_name, const Columns & key_columns, const DataTypes & key_types,\
const PaddedPODArray<TYPE> & def, PaddedPODArray<TYPE> & out) const\
{\
dict_struct.validateKeyTypes(key_types);\
\
const auto & attribute = getAttribute(attribute_name);\
if (!isAttributeTypeConvertibleTo(attribute.type, AttributeUnderlyingType::TYPE))\
throw Exception{\
name + ": type mismatch: attribute " + attribute_name + " has type " + toString(attribute.type),\
ErrorCodes::TYPE_MISMATCH};\
\
getItemsNumber<TYPE>(attribute, key_columns,\
[&] (const std::size_t row, const auto value) { out[row] = value; },\
[&] (const std::size_t row) { return def[row]; });\
}
DECLARE(UInt8)
DECLARE(UInt16)
DECLARE(UInt32)
DECLARE(UInt64)
DECLARE(Int8)
DECLARE(Int16)
DECLARE(Int32)
DECLARE(Int64)
DECLARE(Float32)
DECLARE(Float64)
#undef DECLARE
void ComplexKeyHashedDictionary::getString(
const std::string & attribute_name, const Columns & key_columns, const DataTypes & key_types,
const ColumnString * const def, ColumnString * const out) const
{
dict_struct.validateKeyTypes(key_types);
const auto & attribute = getAttribute(attribute_name);
if (!isAttributeTypeConvertibleTo(attribute.type, AttributeUnderlyingType::String))
throw Exception{
name + ": type mismatch: attribute " + attribute_name + " has type " + toString(attribute.type),
ErrorCodes::TYPE_MISMATCH};
getItemsImpl<StringRef, StringRef>(attribute, key_columns,
[&] (const std::size_t row, const StringRef value) { out->insertData(value.data, value.size); },
[&] (const std::size_t row) { return def->getDataAt(row); });
}
#define DECLARE(TYPE)\
void ComplexKeyHashedDictionary::get##TYPE(\
const std::string & attribute_name, const Columns & key_columns, const DataTypes & key_types,\
const TYPE def, PaddedPODArray<TYPE> & out) const\
{\
dict_struct.validateKeyTypes(key_types);\
\
const auto & attribute = getAttribute(attribute_name);\
if (!isAttributeTypeConvertibleTo(attribute.type, AttributeUnderlyingType::TYPE))\
throw Exception{\
name + ": type mismatch: attribute " + attribute_name + " has type " + toString(attribute.type),\
ErrorCodes::TYPE_MISMATCH};\
\
getItemsNumber<TYPE>(attribute, key_columns,\
[&] (const std::size_t row, const auto value) { out[row] = value; },\
[&] (const std::size_t) { return def; });\
}
DECLARE(UInt8)
DECLARE(UInt16)
DECLARE(UInt32)
DECLARE(UInt64)
DECLARE(Int8)
DECLARE(Int16)
DECLARE(Int32)
DECLARE(Int64)
DECLARE(Float32)
DECLARE(Float64)
#undef DECLARE
void ComplexKeyHashedDictionary::getString(
const std::string & attribute_name, const Columns & key_columns, const DataTypes & key_types,
const String & def, ColumnString * const out) const
{
dict_struct.validateKeyTypes(key_types);
const auto & attribute = getAttribute(attribute_name);
if (!isAttributeTypeConvertibleTo(attribute.type, AttributeUnderlyingType::String))
throw Exception{
name + ": type mismatch: attribute " + attribute_name + " has type " + toString(attribute.type),
ErrorCodes::TYPE_MISMATCH};
getItemsImpl<StringRef, StringRef>(attribute, key_columns,
[&] (const std::size_t row, const StringRef value) { out->insertData(value.data, value.size); },
[&] (const std::size_t) { return StringRef{def}; });
}
void ComplexKeyHashedDictionary::has(const Columns & key_columns, const DataTypes & key_types, PaddedPODArray<UInt8> & out) const
{
dict_struct.validateKeyTypes(key_types);
const auto & attribute = attributes.front();
switch (attribute.type)
{
case AttributeUnderlyingType::UInt8: has<UInt8>(attribute, key_columns, out); break;
case AttributeUnderlyingType::UInt16: has<UInt16>(attribute, key_columns, out); break;
case AttributeUnderlyingType::UInt32: has<UInt32>(attribute, key_columns, out); break;
case AttributeUnderlyingType::UInt64: has<UInt64>(attribute, key_columns, out); break;
case AttributeUnderlyingType::Int8: has<Int8>(attribute, key_columns, out); break;
case AttributeUnderlyingType::Int16: has<Int16>(attribute, key_columns, out); break;
case AttributeUnderlyingType::Int32: has<Int32>(attribute, key_columns, out); break;
case AttributeUnderlyingType::Int64: has<Int64>(attribute, key_columns, out); break;
case AttributeUnderlyingType::Float32: has<Float32>(attribute, key_columns, out); break;
case AttributeUnderlyingType::Float64: has<Float64>(attribute, key_columns, out); break;
case AttributeUnderlyingType::String: has<StringRef>(attribute, key_columns, out); break;
}
}
void ComplexKeyHashedDictionary::createAttributes()
{
const auto size = dict_struct.attributes.size();
attributes.reserve(size);
for (const auto & attribute : dict_struct.attributes)
{
attribute_index_by_name.emplace(attribute.name, attributes.size());
attributes.push_back(createAttributeWithType(attribute.underlying_type, attribute.null_value));
if (attribute.hierarchical)
throw Exception{
name + ": hierarchical attributes not supported for dictionary of type " + getTypeName(),
ErrorCodes::TYPE_MISMATCH};
}
}
void ComplexKeyHashedDictionary::loadData()
{
auto stream = source_ptr->loadAll();
stream->readPrefix();
/// created upfront to avoid excess allocations
const auto keys_size = dict_struct.key.value().size();
StringRefs keys(keys_size);
const auto attributes_size = attributes.size();
while (const auto block = stream->read())
{
const auto rows = block.rows();
element_count += rows;
const auto key_column_ptrs = ext::map<Columns>(ext::range(0, keys_size),
[&] (const std::size_t attribute_idx) {
return block.safeGetByPosition(attribute_idx).column;
});
const auto attribute_column_ptrs = ext::map<Columns>(ext::range(0, attributes_size),
[&] (const std::size_t attribute_idx) {
return block.safeGetByPosition(keys_size + attribute_idx).column;
});
for (const auto row_idx : ext::range(0, rows))
{
/// calculate key once per row
const auto key = placeKeysInPool(row_idx, key_column_ptrs, keys, keys_pool);
auto should_rollback = false;
for (const auto attribute_idx : ext::range(0, attributes_size))
{
const auto & attribute_column = *attribute_column_ptrs[attribute_idx];
auto & attribute = attributes[attribute_idx];
const auto inserted = setAttributeValue(attribute, key, attribute_column[row_idx]);
if (!inserted)
should_rollback = true;
}
/// @note on multiple equal keys the mapped value for the first one is stored
if (should_rollback)
keys_pool.rollback(key.size);
}
}
stream->readSuffix();
if (require_nonempty && 0 == element_count)
throw Exception{
name + ": dictionary source is empty and 'require_nonempty' property is set.",
ErrorCodes::DICTIONARY_IS_EMPTY};
}
template <typename T>
void ComplexKeyHashedDictionary::addAttributeSize(const Attribute & attribute)
{
const auto & map_ref = std::get<ContainerPtrType<T>>(attribute.maps);
bytes_allocated += sizeof(ContainerType<T>) + map_ref->getBufferSizeInBytes();
bucket_count = map_ref->getBufferSizeInCells();
}
void ComplexKeyHashedDictionary::calculateBytesAllocated()
{
bytes_allocated += attributes.size() * sizeof(attributes.front());
for (const auto & attribute : attributes)
{
switch (attribute.type)
{
case AttributeUnderlyingType::UInt8: addAttributeSize<UInt8>(attribute); break;
case AttributeUnderlyingType::UInt16: addAttributeSize<UInt16>(attribute); break;
case AttributeUnderlyingType::UInt32: addAttributeSize<UInt32>(attribute); break;
case AttributeUnderlyingType::UInt64: addAttributeSize<UInt64>(attribute); break;
case AttributeUnderlyingType::Int8: addAttributeSize<Int8>(attribute); break;
case AttributeUnderlyingType::Int16: addAttributeSize<Int16>(attribute); break;
case AttributeUnderlyingType::Int32: addAttributeSize<Int32>(attribute); break;
case AttributeUnderlyingType::Int64: addAttributeSize<Int64>(attribute); break;
case AttributeUnderlyingType::Float32: addAttributeSize<Float32>(attribute); break;
case AttributeUnderlyingType::Float64: addAttributeSize<Float64>(attribute); break;
case AttributeUnderlyingType::String:
{
addAttributeSize<StringRef>(attribute);
bytes_allocated += sizeof(Arena) + attribute.string_arena->size();
break;
}
}
}
bytes_allocated += keys_pool.size();
}
template <typename T>
void ComplexKeyHashedDictionary::createAttributeImpl(Attribute & attribute, const Field & null_value)
{
std::get<T>(attribute.null_values) = null_value.get<typename NearestFieldType<T>::Type>();
std::get<ContainerPtrType<T>>(attribute.maps) = std::make_unique<ContainerType<T>>();
}
ComplexKeyHashedDictionary::Attribute ComplexKeyHashedDictionary::createAttributeWithType(const AttributeUnderlyingType type, const Field & null_value)
{
Attribute attr{type};
switch (type)
{
case AttributeUnderlyingType::UInt8: createAttributeImpl<UInt8>(attr, null_value); break;
case AttributeUnderlyingType::UInt16: createAttributeImpl<UInt16>(attr, null_value); break;
case AttributeUnderlyingType::UInt32: createAttributeImpl<UInt32>(attr, null_value); break;
case AttributeUnderlyingType::UInt64: createAttributeImpl<UInt64>(attr, null_value); break;
case AttributeUnderlyingType::Int8: createAttributeImpl<Int8>(attr, null_value); break;
case AttributeUnderlyingType::Int16: createAttributeImpl<Int16>(attr, null_value); break;
case AttributeUnderlyingType::Int32: createAttributeImpl<Int32>(attr, null_value); break;
case AttributeUnderlyingType::Int64: createAttributeImpl<Int64>(attr, null_value); break;
case AttributeUnderlyingType::Float32: createAttributeImpl<Float32>(attr, null_value); break;
case AttributeUnderlyingType::Float64: createAttributeImpl<Float64>(attr, null_value); break;
case AttributeUnderlyingType::String:
{
std::get<String>(attr.null_values) = null_value.get<String>();
std::get<ContainerPtrType<StringRef>>(attr.maps) = std::make_unique<ContainerType<StringRef>>();
attr.string_arena = std::make_unique<Arena>();
break;
}
}
return attr;
}
template <typename OutputType, typename ValueSetter, typename DefaultGetter>
void ComplexKeyHashedDictionary::getItemsNumber(
const Attribute & attribute,
const Columns & key_columns,
ValueSetter && set_value,
DefaultGetter && get_default) const
{
if (false) {}
#define DISPATCH(TYPE) \
else if (attribute.type == AttributeUnderlyingType::TYPE) \
getItemsImpl<TYPE, OutputType>(attribute, key_columns, std::forward<ValueSetter>(set_value), std::forward<DefaultGetter>(get_default));
DISPATCH(UInt8)
DISPATCH(UInt16)
DISPATCH(UInt32)
DISPATCH(UInt64)
DISPATCH(Int8)
DISPATCH(Int16)
DISPATCH(Int32)
DISPATCH(Int64)
DISPATCH(Float32)
DISPATCH(Float64)
#undef DISPATCH
else
throw Exception("Unexpected type of attribute: " + toString(attribute.type), ErrorCodes::LOGICAL_ERROR);
}
template <typename AttributeType, typename OutputType, typename ValueSetter, typename DefaultGetter>
void ComplexKeyHashedDictionary::getItemsImpl(
const Attribute & attribute,
const Columns & key_columns,
ValueSetter && set_value,
DefaultGetter && get_default) const
{
const auto & attr = *std::get<ContainerPtrType<AttributeType>>(attribute.maps);
const auto keys_size = key_columns.size();
StringRefs keys(keys_size);
Arena temporary_keys_pool;
const auto rows = key_columns.front()->size();
for (const auto i : ext::range(0, rows))
{
/// copy key data to arena so it is contiguous and return StringRef to it
const auto key = placeKeysInPool(i, key_columns, keys, temporary_keys_pool);
const auto it = attr.find(key);
set_value(i, it != attr.end() ? it->second : get_default(i));
/// free memory allocated for the key
temporary_keys_pool.rollback(key.size);
}
query_count.fetch_add(rows, std::memory_order_relaxed);
}
template <typename T>
bool ComplexKeyHashedDictionary::setAttributeValueImpl(Attribute & attribute, const StringRef key, const T value)
{
auto & map = *std::get<ContainerPtrType<T>>(attribute.maps);
const auto pair = map.insert({ key, value });
return pair.second;
}
bool ComplexKeyHashedDictionary::setAttributeValue(Attribute & attribute, const StringRef key, const Field & value)
{
switch (attribute.type)
{
case AttributeUnderlyingType::UInt8: return setAttributeValueImpl<UInt8>(attribute, key, value.get<UInt64>());
case AttributeUnderlyingType::UInt16: return setAttributeValueImpl<UInt16>(attribute, key, value.get<UInt64>());
case AttributeUnderlyingType::UInt32: return setAttributeValueImpl<UInt32>(attribute, key, value.get<UInt64>());
case AttributeUnderlyingType::UInt64: return setAttributeValueImpl<UInt64>(attribute, key, value.get<UInt64>());
case AttributeUnderlyingType::Int8: return setAttributeValueImpl<Int8>(attribute, key, value.get<Int64>());
case AttributeUnderlyingType::Int16: return setAttributeValueImpl<Int16>(attribute, key, value.get<Int64>());
case AttributeUnderlyingType::Int32: return setAttributeValueImpl<Int32>(attribute, key, value.get<Int64>());
case AttributeUnderlyingType::Int64: return setAttributeValueImpl<Int64>(attribute, key, value.get<Int64>());
case AttributeUnderlyingType::Float32: return setAttributeValueImpl<Float32>(attribute, key, value.get<Float64>());
case AttributeUnderlyingType::Float64: return setAttributeValueImpl<Float64>(attribute, key, value.get<Float64>());
case AttributeUnderlyingType::String:
{
auto & map = *std::get<ContainerPtrType<StringRef>>(attribute.maps);
const auto & string = value.get<String>();
const auto string_in_arena = attribute.string_arena->insert(string.data(), string.size());
const auto pair = map.insert({ key, StringRef{string_in_arena, string.size()} });
return pair.second;
}
}
return {};
}
const ComplexKeyHashedDictionary::Attribute & ComplexKeyHashedDictionary::getAttribute(const std::string & attribute_name) const
{
const auto it = attribute_index_by_name.find(attribute_name);
if (it == std::end(attribute_index_by_name))
throw Exception{
name + ": no such attribute '" + attribute_name + "'",
ErrorCodes::BAD_ARGUMENTS};
return attributes[it->second];
}
StringRef ComplexKeyHashedDictionary::placeKeysInPool(
const std::size_t row, const Columns & key_columns, StringRefs & keys, Arena & pool)
{
const auto keys_size = key_columns.size();
size_t sum_keys_size{};
const char * block_start = nullptr;
for (size_t j = 0; j < keys_size; ++j)
{
keys[j] = key_columns[j]->serializeValueIntoArena(row, pool, block_start);
sum_keys_size += keys[j].size;
}
auto key_start = block_start;
for (size_t j = 0; j < keys_size; ++j)
{
keys[j].data = key_start;
key_start += keys[j].size;
}
return { block_start, sum_keys_size };
}
template <typename T>
void ComplexKeyHashedDictionary::has(const Attribute & attribute, const Columns & key_columns, PaddedPODArray<UInt8> & out) const
{
const auto & attr = *std::get<ContainerPtrType<T>>(attribute.maps);
const auto keys_size = key_columns.size();
StringRefs keys(keys_size);
Arena temporary_keys_pool;
const auto rows = key_columns.front()->size();
for (const auto i : ext::range(0, rows))
{
/// copy key data to arena so it is contiguous and return StringRef to it
const auto key = placeKeysInPool(i, key_columns, keys, temporary_keys_pool);
const auto it = attr.find(key);
out[i] = it != attr.end();
/// free memory allocated for the key
temporary_keys_pool.rollback(key.size);
}
query_count.fetch_add(rows, std::memory_order_relaxed);
}
std::vector<StringRef> ComplexKeyHashedDictionary::getKeys() const
{
const Attribute & attribute = attributes.front();
switch (attribute.type)
{
case AttributeUnderlyingType::UInt8: return getKeys<UInt8>(attribute); break;
case AttributeUnderlyingType::UInt16: return getKeys<UInt16>(attribute); break;
case AttributeUnderlyingType::UInt32: return getKeys<UInt32>(attribute); break;
case AttributeUnderlyingType::UInt64: return getKeys<UInt64>(attribute); break;
case AttributeUnderlyingType::Int8: return getKeys<Int8>(attribute); break;
case AttributeUnderlyingType::Int16: return getKeys<Int16>(attribute); break;
case AttributeUnderlyingType::Int32: return getKeys<Int32>(attribute); break;
case AttributeUnderlyingType::Int64: return getKeys<Int64>(attribute); break;
case AttributeUnderlyingType::Float32: return getKeys<Float32>(attribute); break;
case AttributeUnderlyingType::Float64: return getKeys<Float64>(attribute); break;
case AttributeUnderlyingType::String: return getKeys<StringRef>(attribute); break;
}
return {};
}
template <typename T>
std::vector<StringRef> ComplexKeyHashedDictionary::getKeys(const Attribute & attribute) const
{
const ContainerType<T> & attr = *std::get<ContainerPtrType<T>>(attribute.maps);
std::vector<StringRef> keys;
keys.reserve(attr.size());
for (const auto & key : attr)
keys.push_back(key.first);
return keys;
}
BlockInputStreamPtr ComplexKeyHashedDictionary::getBlockInputStream(const Names & column_names, size_t max_block_size) const
{
using BlockInputStreamType = DictionaryBlockInputStream<ComplexKeyHashedDictionary, UInt64>;
return std::make_shared<BlockInputStreamType>(shared_from_this(), max_block_size, getKeys(), column_names);
}
}