mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-14 18:32:29 +00:00
107 lines
3.7 KiB
C++
107 lines
3.7 KiB
C++
#include "config.h"
|
|
#include "Interpreters/Context_fwd.h"
|
|
|
|
#if USE_HDFS
|
|
|
|
#include <Storages/HDFS/StorageHDFSCluster.h>
|
|
|
|
#include <Core/QueryProcessingStage.h>
|
|
#include <DataTypes/DataTypeString.h>
|
|
#include <Interpreters/getHeaderForProcessingStage.h>
|
|
#include <Interpreters/InterpreterSelectQuery.h>
|
|
#include <QueryPipeline/RemoteQueryExecutor.h>
|
|
|
|
#include <Processors/Transforms/AddingDefaultsTransform.h>
|
|
|
|
#include <Processors/Sources/RemoteSource.h>
|
|
#include <Parsers/ASTTablesInSelectQuery.h>
|
|
#include <Parsers/queryToString.h>
|
|
|
|
#include <Storages/HDFS/HDFSCommon.h>
|
|
#include <Storages/IStorage.h>
|
|
#include <Storages/SelectQueryInfo.h>
|
|
#include <Storages/extractTableFunctionArgumentsFromSelectQuery.h>
|
|
#include <Storages/VirtualColumnUtils.h>
|
|
|
|
#include <TableFunctions/TableFunctionHDFSCluster.h>
|
|
#include <memory>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int LOGICAL_ERROR;
|
|
}
|
|
|
|
StorageHDFSCluster::StorageHDFSCluster(
|
|
ContextPtr context_,
|
|
const String & cluster_name_,
|
|
const String & uri_,
|
|
const StorageID & table_id_,
|
|
const String & format_name_,
|
|
const ColumnsDescription & columns_,
|
|
const ConstraintsDescription & constraints_,
|
|
const String & compression_method)
|
|
: IStorageCluster(cluster_name_, table_id_, getLogger("StorageHDFSCluster (" + table_id_.table_name + ")"))
|
|
, uri(uri_)
|
|
, format_name(format_name_)
|
|
{
|
|
checkHDFSURL(uri_);
|
|
context_->getRemoteHostFilter().checkURL(Poco::URI(uri_));
|
|
|
|
StorageInMemoryMetadata storage_metadata;
|
|
|
|
if (columns_.empty())
|
|
{
|
|
ColumnsDescription columns;
|
|
if (format_name == "auto")
|
|
std::tie(columns, format_name) = StorageHDFS::getTableStructureAndFormatFromData(uri_, compression_method, context_);
|
|
else
|
|
columns = StorageHDFS::getTableStructureFromData(format_name, uri_, compression_method, context_);
|
|
storage_metadata.setColumns(columns);
|
|
}
|
|
else
|
|
{
|
|
if (format_name == "auto")
|
|
format_name = StorageHDFS::getTableStructureAndFormatFromData(uri_, compression_method, context_).second;
|
|
|
|
storage_metadata.setColumns(columns_);
|
|
}
|
|
|
|
storage_metadata.setConstraints(constraints_);
|
|
setInMemoryMetadata(storage_metadata);
|
|
|
|
virtual_columns = VirtualColumnUtils::getPathFileAndSizeVirtualsForStorage(storage_metadata.getSampleBlock().getNamesAndTypesList());
|
|
}
|
|
|
|
void StorageHDFSCluster::updateQueryToSendIfNeeded(DB::ASTPtr & query, const DB::StorageSnapshotPtr & storage_snapshot, const DB::ContextPtr & context)
|
|
{
|
|
ASTExpressionList * expression_list = extractTableFunctionArgumentsFromSelectQuery(query);
|
|
if (!expression_list)
|
|
throw Exception(ErrorCodes::LOGICAL_ERROR, "Expected SELECT query from table function hdfsCluster, got '{}'", queryToString(query));
|
|
|
|
TableFunctionHDFSCluster::updateStructureAndFormatArgumentsIfNeeded(
|
|
expression_list->children, storage_snapshot->metadata->getColumns().getAll().toNamesAndTypesDescription(), format_name, context);
|
|
}
|
|
|
|
|
|
RemoteQueryExecutor::Extension StorageHDFSCluster::getTaskIteratorExtension(const ActionsDAG::Node * predicate, const ContextPtr & context) const
|
|
{
|
|
auto iterator = std::make_shared<HDFSSource::DisclosedGlobIterator>(uri, predicate, virtual_columns, context);
|
|
auto callback = std::make_shared<std::function<String()>>([iter = std::move(iterator)]() mutable -> String { return iter->next().path; });
|
|
return RemoteQueryExecutor::Extension{.task_iterator = std::move(callback)};
|
|
}
|
|
|
|
NamesAndTypesList StorageHDFSCluster::getVirtuals() const
|
|
{
|
|
return NamesAndTypesList{
|
|
{"_path", std::make_shared<DataTypeLowCardinality>(std::make_shared<DataTypeString>())},
|
|
{"_file", std::make_shared<DataTypeLowCardinality>(std::make_shared<DataTypeString>())}};
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|