ClickHouse/src/Storages/StorageInMemoryMetadata.cpp
2021-12-13 17:21:05 +03:00

692 lines
20 KiB
C++

#include <Storages/StorageInMemoryMetadata.h>
#include <Common/HashTable/HashMap.h>
#include <Common/HashTable/HashSet.h>
#include <Common/quoteString.h>
#include <Common/StringUtils/StringUtils.h>
#include <Core/ColumnWithTypeAndName.h>
#include <DataTypes/DataTypeEnum.h>
#include <IO/ReadBufferFromString.h>
#include <IO/ReadHelpers.h>
#include <IO/Operators.h>
namespace DB
{
namespace ErrorCodes
{
extern const int COLUMN_QUERIED_MORE_THAN_ONCE;
extern const int DUPLICATE_COLUMN;
extern const int EMPTY_LIST_OF_COLUMNS_QUERIED;
extern const int NO_SUCH_COLUMN_IN_TABLE;
extern const int NOT_FOUND_COLUMN_IN_BLOCK;
extern const int TYPE_MISMATCH;
extern const int EMPTY_LIST_OF_COLUMNS_PASSED;
}
StorageInMemoryMetadata::StorageInMemoryMetadata(const StorageInMemoryMetadata & other)
: columns(other.columns)
, secondary_indices(other.secondary_indices)
, constraints(other.constraints)
, projections(other.projections.clone())
, minmax_count_projection(
other.minmax_count_projection ? std::optional<ProjectionDescription>(other.minmax_count_projection->clone()) : std::nullopt)
, partition_key(other.partition_key)
, primary_key(other.primary_key)
, sorting_key(other.sorting_key)
, sampling_key(other.sampling_key)
, column_ttls_by_name(other.column_ttls_by_name)
, table_ttl(other.table_ttl)
, settings_changes(other.settings_changes ? other.settings_changes->clone() : nullptr)
, select(other.select)
, comment(other.comment)
{
}
StorageInMemoryMetadata & StorageInMemoryMetadata::operator=(const StorageInMemoryMetadata & other)
{
if (&other == this)
return *this;
columns = other.columns;
secondary_indices = other.secondary_indices;
constraints = other.constraints;
projections = other.projections.clone();
if (other.minmax_count_projection)
minmax_count_projection = other.minmax_count_projection->clone();
else
minmax_count_projection = std::nullopt;
partition_key = other.partition_key;
primary_key = other.primary_key;
sorting_key = other.sorting_key;
sampling_key = other.sampling_key;
column_ttls_by_name = other.column_ttls_by_name;
table_ttl = other.table_ttl;
if (other.settings_changes)
settings_changes = other.settings_changes->clone();
else
settings_changes.reset();
select = other.select;
comment = other.comment;
return *this;
}
void StorageInMemoryMetadata::setComment(const String & comment_)
{
comment = comment_;
}
void StorageInMemoryMetadata::setColumns(ColumnsDescription columns_)
{
if (columns_.getAllPhysical().empty())
throw Exception("Empty list of columns passed", ErrorCodes::EMPTY_LIST_OF_COLUMNS_PASSED);
columns = std::move(columns_);
}
void StorageInMemoryMetadata::setSecondaryIndices(IndicesDescription secondary_indices_)
{
secondary_indices = std::move(secondary_indices_);
}
void StorageInMemoryMetadata::setConstraints(ConstraintsDescription constraints_)
{
constraints = std::move(constraints_);
}
void StorageInMemoryMetadata::setProjections(ProjectionsDescription projections_)
{
projections = std::move(projections_);
}
void StorageInMemoryMetadata::setTableTTLs(const TTLTableDescription & table_ttl_)
{
table_ttl = table_ttl_;
}
void StorageInMemoryMetadata::setColumnTTLs(const TTLColumnsDescription & column_ttls_by_name_)
{
column_ttls_by_name = column_ttls_by_name_;
}
void StorageInMemoryMetadata::setSettingsChanges(const ASTPtr & settings_changes_)
{
if (settings_changes_)
settings_changes = settings_changes_;
else
settings_changes = nullptr;
}
void StorageInMemoryMetadata::setSelectQuery(const SelectQueryDescription & select_)
{
select = select_;
}
const ColumnsDescription & StorageInMemoryMetadata::getColumns() const
{
return columns;
}
const IndicesDescription & StorageInMemoryMetadata::getSecondaryIndices() const
{
return secondary_indices;
}
bool StorageInMemoryMetadata::hasSecondaryIndices() const
{
return !secondary_indices.empty();
}
const ConstraintsDescription & StorageInMemoryMetadata::getConstraints() const
{
return constraints;
}
const ProjectionsDescription & StorageInMemoryMetadata::getProjections() const
{
return projections;
}
bool StorageInMemoryMetadata::hasProjections() const
{
return !projections.empty();
}
TTLTableDescription StorageInMemoryMetadata::getTableTTLs() const
{
return table_ttl;
}
bool StorageInMemoryMetadata::hasAnyTableTTL() const
{
return hasAnyMoveTTL() || hasRowsTTL() || hasAnyRecompressionTTL() || hasAnyGroupByTTL() || hasAnyRowsWhereTTL();
}
TTLColumnsDescription StorageInMemoryMetadata::getColumnTTLs() const
{
return column_ttls_by_name;
}
bool StorageInMemoryMetadata::hasAnyColumnTTL() const
{
return !column_ttls_by_name.empty();
}
TTLDescription StorageInMemoryMetadata::getRowsTTL() const
{
return table_ttl.rows_ttl;
}
bool StorageInMemoryMetadata::hasRowsTTL() const
{
return table_ttl.rows_ttl.expression != nullptr;
}
TTLDescriptions StorageInMemoryMetadata::getRowsWhereTTLs() const
{
return table_ttl.rows_where_ttl;
}
bool StorageInMemoryMetadata::hasAnyRowsWhereTTL() const
{
return !table_ttl.rows_where_ttl.empty();
}
TTLDescriptions StorageInMemoryMetadata::getMoveTTLs() const
{
return table_ttl.move_ttl;
}
bool StorageInMemoryMetadata::hasAnyMoveTTL() const
{
return !table_ttl.move_ttl.empty();
}
TTLDescriptions StorageInMemoryMetadata::getRecompressionTTLs() const
{
return table_ttl.recompression_ttl;
}
bool StorageInMemoryMetadata::hasAnyRecompressionTTL() const
{
return !table_ttl.recompression_ttl.empty();
}
TTLDescriptions StorageInMemoryMetadata::getGroupByTTLs() const
{
return table_ttl.group_by_ttl;
}
bool StorageInMemoryMetadata::hasAnyGroupByTTL() const
{
return !table_ttl.group_by_ttl.empty();
}
ColumnDependencies StorageInMemoryMetadata::getColumnDependencies(const NameSet & updated_columns, bool include_ttl_target) const
{
if (updated_columns.empty())
return {};
ColumnDependencies res;
NameSet indices_columns;
NameSet projections_columns;
NameSet required_ttl_columns;
NameSet updated_ttl_columns;
auto add_dependent_columns = [&updated_columns](const auto & expression, auto & to_set)
{
auto required_columns = expression->getRequiredColumns();
for (const auto & dependency : required_columns)
{
if (updated_columns.count(dependency))
{
to_set.insert(required_columns.begin(), required_columns.end());
return true;
}
}
return false;
};
for (const auto & index : getSecondaryIndices())
add_dependent_columns(index.expression, indices_columns);
for (const auto & projection : getProjections())
add_dependent_columns(&projection, projections_columns);
auto add_for_rows_ttl = [&](const auto & expression, auto & to_set)
{
if (add_dependent_columns(expression, to_set) && include_ttl_target)
{
/// Filter all columns, if rows TTL expression have to be recalculated.
for (const auto & column : getColumns().getAllPhysical())
updated_ttl_columns.insert(column.name);
}
};
if (hasRowsTTL())
add_for_rows_ttl(getRowsTTL().expression, required_ttl_columns);
for (const auto & entry : getRowsWhereTTLs())
add_for_rows_ttl(entry.expression, required_ttl_columns);
for (const auto & entry : getGroupByTTLs())
add_for_rows_ttl(entry.expression, required_ttl_columns);
for (const auto & entry : getRecompressionTTLs())
add_dependent_columns(entry.expression, required_ttl_columns);
for (const auto & [name, entry] : getColumnTTLs())
{
if (add_dependent_columns(entry.expression, required_ttl_columns) && include_ttl_target)
updated_ttl_columns.insert(name);
}
for (const auto & entry : getMoveTTLs())
add_dependent_columns(entry.expression, required_ttl_columns);
//TODO what about rows_where_ttl and group_by_ttl ??
for (const auto & column : indices_columns)
res.emplace(column, ColumnDependency::SKIP_INDEX);
for (const auto & column : projections_columns)
res.emplace(column, ColumnDependency::PROJECTION);
for (const auto & column : required_ttl_columns)
res.emplace(column, ColumnDependency::TTL_EXPRESSION);
for (const auto & column : updated_ttl_columns)
res.emplace(column, ColumnDependency::TTL_TARGET);
return res;
}
Block StorageInMemoryMetadata::getSampleBlockNonMaterialized() const
{
Block res;
for (const auto & column : getColumns().getOrdinary())
res.insert({column.type->createColumn(), column.type, column.name});
return res;
}
Block StorageInMemoryMetadata::getSampleBlockWithVirtuals(const NamesAndTypesList & virtuals) const
{
auto res = getSampleBlock();
/// Virtual columns must be appended after ordinary, because user can
/// override them.
for (const auto & column : virtuals)
res.insert({column.type->createColumn(), column.type, column.name});
return res;
}
Block StorageInMemoryMetadata::getSampleBlock() const
{
Block res;
for (const auto & column : getColumns().getAllPhysical())
res.insert({column.type->createColumn(), column.type, column.name});
return res;
}
Block StorageInMemoryMetadata::getSampleBlockForColumns(
const Names & column_names, const NamesAndTypesList & virtuals, const StorageID & storage_id) const
{
Block res;
HashMapWithSavedHash<StringRef, const DataTypePtr *, StringRefHash> virtuals_map;
/// Virtual columns must be appended after ordinary, because user can
/// override them.
for (const auto & column : virtuals)
virtuals_map[column.name] = &column.type;
for (const auto & name : column_names)
{
auto column = getColumns().tryGetColumnOrSubcolumn(ColumnsDescription::All, name);
if (column)
{
res.insert({column->type->createColumn(), column->type, column->name});
}
else if (auto * it = virtuals_map.find(name); it != virtuals_map.end())
{
const auto & type = *it->getMapped();
res.insert({type->createColumn(), type, name});
}
else
throw Exception(
"Column " + backQuote(name) + " not found in table " + (storage_id.empty() ? "" : storage_id.getNameForLogs()),
ErrorCodes::NOT_FOUND_COLUMN_IN_BLOCK);
}
return res;
}
const KeyDescription & StorageInMemoryMetadata::getPartitionKey() const
{
return partition_key;
}
bool StorageInMemoryMetadata::isPartitionKeyDefined() const
{
return partition_key.definition_ast != nullptr;
}
bool StorageInMemoryMetadata::hasPartitionKey() const
{
return !partition_key.column_names.empty();
}
Names StorageInMemoryMetadata::getColumnsRequiredForPartitionKey() const
{
if (hasPartitionKey())
return partition_key.expression->getRequiredColumns();
return {};
}
const KeyDescription & StorageInMemoryMetadata::getSortingKey() const
{
return sorting_key;
}
bool StorageInMemoryMetadata::isSortingKeyDefined() const
{
return sorting_key.definition_ast != nullptr;
}
bool StorageInMemoryMetadata::hasSortingKey() const
{
return !sorting_key.column_names.empty();
}
Names StorageInMemoryMetadata::getColumnsRequiredForSortingKey() const
{
if (hasSortingKey())
return sorting_key.expression->getRequiredColumns();
return {};
}
Names StorageInMemoryMetadata::getSortingKeyColumns() const
{
if (hasSortingKey())
return sorting_key.column_names;
return {};
}
const KeyDescription & StorageInMemoryMetadata::getSamplingKey() const
{
return sampling_key;
}
bool StorageInMemoryMetadata::isSamplingKeyDefined() const
{
return sampling_key.definition_ast != nullptr;
}
bool StorageInMemoryMetadata::hasSamplingKey() const
{
return !sampling_key.column_names.empty();
}
Names StorageInMemoryMetadata::getColumnsRequiredForSampling() const
{
if (hasSamplingKey())
return sampling_key.expression->getRequiredColumns();
return {};
}
const KeyDescription & StorageInMemoryMetadata::getPrimaryKey() const
{
return primary_key;
}
bool StorageInMemoryMetadata::isPrimaryKeyDefined() const
{
return primary_key.definition_ast != nullptr;
}
bool StorageInMemoryMetadata::hasPrimaryKey() const
{
return !primary_key.column_names.empty();
}
Names StorageInMemoryMetadata::getColumnsRequiredForPrimaryKey() const
{
if (hasPrimaryKey())
return primary_key.expression->getRequiredColumns();
return {};
}
Names StorageInMemoryMetadata::getPrimaryKeyColumns() const
{
if (!primary_key.column_names.empty())
return primary_key.column_names;
return {};
}
ASTPtr StorageInMemoryMetadata::getSettingsChanges() const
{
if (settings_changes)
return settings_changes->clone();
return nullptr;
}
const SelectQueryDescription & StorageInMemoryMetadata::getSelectQuery() const
{
return select;
}
bool StorageInMemoryMetadata::hasSelectQuery() const
{
return select.select_query != nullptr;
}
namespace
{
using NamesAndTypesMap = HashMapWithSavedHash<StringRef, const IDataType *, StringRefHash>;
using UniqueStrings = HashSetWithSavedHash<StringRef, StringRefHash>;
String listOfColumns(const NamesAndTypesList & available_columns)
{
WriteBufferFromOwnString ss;
for (auto it = available_columns.begin(); it != available_columns.end(); ++it)
{
if (it != available_columns.begin())
ss << ", ";
ss << it->name;
}
return ss.str();
}
NamesAndTypesMap getColumnsMap(const NamesAndTypesList & columns)
{
NamesAndTypesMap res;
for (const auto & column : columns)
res.insert({column.name, column.type.get()});
return res;
}
/*
* This function checks compatibility of enums. It returns true if:
* 1. Both types are enums.
* 2. The first type can represent all possible values of the second one.
* 3. Both types require the same amount of memory.
*/
bool isCompatibleEnumTypes(const IDataType * lhs, const IDataType * rhs)
{
if (IDataTypeEnum const * enum_type = dynamic_cast<IDataTypeEnum const *>(lhs))
{
if (!enum_type->contains(*rhs))
return false;
return enum_type->getMaximumSizeOfValueInMemory() == rhs->getMaximumSizeOfValueInMemory();
}
return false;
}
}
void StorageInMemoryMetadata::check(const Names & column_names, const NamesAndTypesList & virtuals, const StorageID & storage_id) const
{
if (column_names.empty())
{
auto list_of_columns = listOfColumns(getColumns().getAllPhysicalWithSubcolumns());
throw Exception(ErrorCodes::EMPTY_LIST_OF_COLUMNS_QUERIED,
"Empty list of columns queried. There are columns: {}", list_of_columns);
}
const auto virtuals_map = getColumnsMap(virtuals);
UniqueStrings unique_names;
for (const auto & name : column_names)
{
bool has_column = getColumns().hasColumnOrSubcolumn(ColumnsDescription::AllPhysical, name)
|| virtuals_map.find(name) != nullptr;
if (!has_column)
{
auto list_of_columns = listOfColumns(getColumns().getAllPhysicalWithSubcolumns());
throw Exception(ErrorCodes::NO_SUCH_COLUMN_IN_TABLE,
"There is no column with name {} in table {}. There are columns: {}",
backQuote(name), storage_id.getNameForLogs(), list_of_columns);
}
if (unique_names.end() != unique_names.find(name))
throw Exception(ErrorCodes::COLUMN_QUERIED_MORE_THAN_ONCE, "Column {} queried more than once", name);
unique_names.insert(name);
}
}
void StorageInMemoryMetadata::check(const NamesAndTypesList & provided_columns) const
{
const NamesAndTypesList & available_columns = getColumns().getAllPhysical();
const auto columns_map = getColumnsMap(available_columns);
UniqueStrings unique_names;
for (const NameAndTypePair & column : provided_columns)
{
const auto * it = columns_map.find(column.name);
if (columns_map.end() == it)
throw Exception(
ErrorCodes::NO_SUCH_COLUMN_IN_TABLE,
"There is no column with name {}. There are columns: {}",
column.name,
listOfColumns(available_columns));
const auto * available_type = it->getMapped();
if (!column.type->equals(*available_type) && !isCompatibleEnumTypes(available_type, column.type.get()))
throw Exception(
ErrorCodes::TYPE_MISMATCH,
"Type mismatch for column {}. Column has type {}, got type {}",
column.name,
available_type->getName(),
column.type->getName());
if (unique_names.end() != unique_names.find(column.name))
throw Exception(ErrorCodes::COLUMN_QUERIED_MORE_THAN_ONCE,
"Column {} queried more than once",
column.name);
unique_names.insert(column.name);
}
}
void StorageInMemoryMetadata::check(const NamesAndTypesList & provided_columns, const Names & column_names) const
{
const NamesAndTypesList & available_columns = getColumns().getAllPhysical();
const auto available_columns_map = getColumnsMap(available_columns);
const auto & provided_columns_map = getColumnsMap(provided_columns);
if (column_names.empty())
throw Exception(
"Empty list of columns queried. There are columns: " + listOfColumns(available_columns),
ErrorCodes::EMPTY_LIST_OF_COLUMNS_QUERIED);
UniqueStrings unique_names;
for (const String & name : column_names)
{
const auto * it = provided_columns_map.find(name);
if (provided_columns_map.end() == it)
continue;
const auto * jt = available_columns_map.find(name);
if (available_columns_map.end() == jt)
throw Exception(
ErrorCodes::NO_SUCH_COLUMN_IN_TABLE,
"There is no column with name {}. There are columns: {}",
name,
listOfColumns(available_columns));
const auto * provided_column_type = it->getMapped();
const auto * available_column_type = jt->getMapped();
if (!provided_column_type->equals(*available_column_type) && !isCompatibleEnumTypes(available_column_type, provided_column_type))
throw Exception(
ErrorCodes::TYPE_MISMATCH,
"Type mismatch for column {}. Column has type {}, got type {}",
name,
available_column_type->getName(),
provided_column_type->getName());
if (unique_names.end() != unique_names.find(name))
throw Exception(ErrorCodes::COLUMN_QUERIED_MORE_THAN_ONCE,
"Column {} queried more than once",
name);
unique_names.insert(name);
}
}
void StorageInMemoryMetadata::check(const Block & block, bool need_all) const
{
const NamesAndTypesList & available_columns = getColumns().getAllPhysical();
const auto columns_map = getColumnsMap(available_columns);
NameSet names_in_block;
block.checkNumberOfRows();
for (const auto & column : block)
{
if (names_in_block.count(column.name))
throw Exception("Duplicate column " + column.name + " in block", ErrorCodes::DUPLICATE_COLUMN);
names_in_block.insert(column.name);
const auto * it = columns_map.find(column.name);
if (columns_map.end() == it)
throw Exception(
ErrorCodes::NO_SUCH_COLUMN_IN_TABLE,
"There is no column with name {}. There are columns: {}",
column.name,
listOfColumns(available_columns));
const auto * available_type = it->getMapped();
if (!column.type->equals(*available_type) && !isCompatibleEnumTypes(available_type, column.type.get()))
throw Exception(
ErrorCodes::TYPE_MISMATCH,
"Type mismatch for column {}. Column has type {}, got type {}",
column.name,
available_type->getName(),
column.type->getName());
}
if (need_all && names_in_block.size() < columns_map.size())
{
for (const auto & available_column : available_columns)
{
if (!names_in_block.count(available_column.name))
throw Exception("Expected column " + available_column.name, ErrorCodes::NOT_FOUND_COLUMN_IN_BLOCK);
}
}
}
}