int caTable::qt_metacall(QMetaObject::Call _c, int _id, void **_a)
{
_id = QTableWidget::qt_metacall(_c, _id, _a);
if (_id < 0)
return _id;
if (_c == QMetaObject::InvokeMetaMethod) {
if (_id < 1)
qt_static_metacall(this, _c, _id, _a);
_id -= 1;
}
#ifndef QT_NO_PROPERTIES
else if (_c == QMetaObject::ReadProperty) {
void *_v = _a[0];
switch (_id) {
case 0: *reinterpret_cast< QString*>(_v) = getPVS(); break;
case 1: *reinterpret_cast< QString*>(_v) = getColumnSizes(); break;
case 2: *reinterpret_cast< colMode*>(_v) = getColorMode(); break;
case 3: *reinterpret_cast< int*>(_v) = getPrecision(); break;
case 4: *reinterpret_cast< SourceMode*>(_v) = getPrecisionMode(); break;
case 5: *reinterpret_cast< SourceMode*>(_v) = getLimitsMode(); break;
case 6: *reinterpret_cast< double*>(_v) = getMaxValue(); break;
case 7: *reinterpret_cast< double*>(_v) = getMinValue(); break;
}
_id -= 8;
} else if (_c == QMetaObject::WriteProperty) {
void *_v = _a[0];
switch (_id) {
case 0: setPVS(*reinterpret_cast< QString*>(_v)); break;
case 1: setColumnSizes(*reinterpret_cast< QString*>(_v)); break;
case 2: setColorMode(*reinterpret_cast< colMode*>(_v)); break;
case 3: setPrecision(*reinterpret_cast< int*>(_v)); break;
case 4: setPrecisionMode(*reinterpret_cast< SourceMode*>(_v)); break;
case 5: setLimitsMode(*reinterpret_cast< SourceMode*>(_v)); break;
case 6: setMaxValue(*reinterpret_cast< double*>(_v)); break;
case 7: setMinValue(*reinterpret_cast< double*>(_v)); break;
}
_id -= 8;
} else if (_c == QMetaObject::ResetProperty) {
_id -= 8;
} else if (_c == QMetaObject::QueryPropertyDesignable) {
_id -= 8;
} else if (_c == QMetaObject::QueryPropertyScriptable) {
_id -= 8;
} else if (_c == QMetaObject::QueryPropertyStored) {
_id -= 8;
} else if (_c == QMetaObject::QueryPropertyEditable) {
_id -= 8;
} else if (_c == QMetaObject::QueryPropertyUser) {
_id -= 8;
}
#endif // QT_NO_PROPERTIES
return _id;
}
BlockInputStreams StorageSystemColumns::read(
const Names & column_names,
ASTPtr query,
const Context & context,
const Settings & settings,
QueryProcessingStage::Enum & processed_stage,
const size_t max_block_size,
const unsigned threads)
{
check(column_names);
processed_stage = QueryProcessingStage::FetchColumns;
Block block;
std::map<std::pair<std::string, std::string>, StoragePtr> storages;
{
Databases databases = context.getDatabases();
/// Добавляем столбец database.
ColumnPtr database_column = std::make_shared<ColumnString>();
for (const auto & database : databases)
database_column->insert(database.first);
block.insert(ColumnWithTypeAndName(database_column, std::make_shared<DataTypeString>(), "database"));
/// Отфильтруем блок со столбцом database.
VirtualColumnUtils::filterBlockWithQuery(query, block, context);
if (!block.rows())
return BlockInputStreams();
database_column = block.getByName("database").column;
size_t rows = database_column->size();
/// Добавляем столбец table.
ColumnPtr table_column = std::make_shared<ColumnString>();
IColumn::Offsets_t offsets(rows);
for (size_t i = 0; i < rows; ++i)
{
const std::string database_name = (*database_column)[i].get<std::string>();
const DatabasePtr database = databases.at(database_name);
offsets[i] = i ? offsets[i - 1] : 0;
for (auto iterator = database->getIterator(); iterator->isValid(); iterator->next())
{
const String & table_name = iterator->name();
storages.emplace(std::piecewise_construct,
std::forward_as_tuple(database_name, table_name),
std::forward_as_tuple(iterator->table()));
table_column->insert(table_name);
offsets[i] += 1;
}
}
for (size_t i = 0; i < block.columns(); ++i)
{
ColumnPtr & column = block.getByPosition(i).column;
column = column->replicate(offsets);
}
block.insert(ColumnWithTypeAndName(table_column, std::make_shared<DataTypeString>(), "table"));
}
/// Отфильтруем блок со столбцами database и table.
VirtualColumnUtils::filterBlockWithQuery(query, block, context);
if (!block.rows())
return BlockInputStreams();
ColumnPtr filtered_database_column = block.getByName("database").column;
ColumnPtr filtered_table_column = block.getByName("table").column;
/// Составляем результат.
ColumnPtr database_column = std::make_shared<ColumnString>();
ColumnPtr table_column = std::make_shared<ColumnString>();
ColumnPtr name_column = std::make_shared<ColumnString>();
ColumnPtr type_column = std::make_shared<ColumnString>();
ColumnPtr default_type_column = std::make_shared<ColumnString>();
ColumnPtr default_expression_column = std::make_shared<ColumnString>();
ColumnPtr bytes_column = std::make_shared<ColumnUInt64>();
size_t rows = filtered_database_column->size();
for (size_t i = 0; i < rows; ++i)
{
const std::string database_name = (*filtered_database_column)[i].get<std::string>();
const std::string table_name = (*filtered_table_column)[i].get<std::string>();
NamesAndTypesList columns;
ColumnDefaults column_defaults;
std::unordered_map<String, size_t> column_sizes;
{
StoragePtr storage = storages.at(std::make_pair(database_name, table_name));
IStorage::TableStructureReadLockPtr table_lock;
try
{
table_lock = storage->lockStructure(false);
}
catch (const Exception & e)
{
/** There are case when IStorage::drop was called,
* but we still own the object.
* Then table will throw exception at attempt to lock it.
* Just skip the table.
*/
if (e.code() == ErrorCodes::TABLE_IS_DROPPED)
continue;
else
throw;
}
columns = storage->getColumnsList();
columns.insert(std::end(columns), std::begin(storage->alias_columns), std::end(storage->alias_columns));
column_defaults = storage->column_defaults;
/** Данные о размерах столбцов для таблиц семейства MergeTree.
* NOTE: В дальнейшем можно сделать интерфейс, позволяющий получить размеры столбцов у IStorage.
*/
if (auto storage_concrete = dynamic_cast<StorageMergeTree *>(storage.get()))
{
column_sizes = storage_concrete->getData().getColumnSizes();
}
else if (auto storage_concrete = dynamic_cast<StorageReplicatedMergeTree *>(storage.get()))
{
column_sizes = storage_concrete->getData().getColumnSizes();
auto unreplicated_data = storage_concrete->getUnreplicatedData();
if (unreplicated_data)
{
auto unreplicated_column_sizes = unreplicated_data->getColumnSizes();
for (const auto & name_size : unreplicated_column_sizes)
column_sizes[name_size.first] += name_size.second;
}
}
}
for (const auto & column : columns)
{
database_column->insert(database_name);
table_column->insert(table_name);
name_column->insert(column.name);
type_column->insert(column.type->getName());
{
const auto it = column_defaults.find(column.name);
if (it == std::end(column_defaults))
{
default_type_column->insertDefault();
default_expression_column->insertDefault();
}
else
{
default_type_column->insert(toString(it->second.type));
default_expression_column->insert(queryToString(it->second.expression));
}
}
{
const auto it = column_sizes.find(column.name);
if (it == std::end(column_sizes))
bytes_column->insertDefault();
else
bytes_column->insert(it->second);
}
}
}
block.clear();
block.insert(ColumnWithTypeAndName(database_column, std::make_shared<DataTypeString>(), "database"));
block.insert(ColumnWithTypeAndName(table_column, std::make_shared<DataTypeString>(), "table"));
block.insert(ColumnWithTypeAndName(name_column, std::make_shared<DataTypeString>(), "name"));
block.insert(ColumnWithTypeAndName(type_column, std::make_shared<DataTypeString>(), "type"));
block.insert(ColumnWithTypeAndName(default_type_column, std::make_shared<DataTypeString>(), "default_type"));
block.insert(ColumnWithTypeAndName(default_expression_column, std::make_shared<DataTypeString>(), "default_expression"));
block.insert(ColumnWithTypeAndName(bytes_column, std::make_shared<DataTypeUInt64>(), "bytes"));
return BlockInputStreams{ 1, std::make_shared<OneBlockInputStream>(block) };
}
