mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-02 04:22:03 +00:00
85 lines
3.4 KiB
C++
85 lines
3.4 KiB
C++
#include "Interpreters/Context_fwd.h"
|
|
#include <Interpreters/getHeaderForProcessingStage.h>
|
|
#include <Interpreters/InterpreterSelectQuery.h>
|
|
#include <Interpreters/AddDefaultDatabaseVisitor.h>
|
|
#include <Processors/Transforms/AddingDefaultsTransform.h>
|
|
#include <Processors/Sources/RemoteSource.h>
|
|
#include <Parsers/queryToString.h>
|
|
#include <QueryPipeline/RemoteQueryExecutor.h>
|
|
#include <Storages/StorageFileCluster.h>
|
|
#include <Storages/IStorage.h>
|
|
#include <Storages/StorageFile.h>
|
|
#include <Storages/extractTableFunctionArgumentsFromSelectQuery.h>
|
|
#include <Storages/VirtualColumnUtils.h>
|
|
#include <TableFunctions/TableFunctionFileCluster.h>
|
|
|
|
#include <memory>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int LOGICAL_ERROR;
|
|
}
|
|
|
|
StorageFileCluster::StorageFileCluster(
|
|
const ContextPtr & context,
|
|
const String & cluster_name_,
|
|
const String & filename_,
|
|
const String & format_name_,
|
|
const String & compression_method,
|
|
const StorageID & table_id_,
|
|
const ColumnsDescription & columns_,
|
|
const ConstraintsDescription & constraints_)
|
|
: IStorageCluster(cluster_name_, table_id_, getLogger("StorageFileCluster (" + table_id_.table_name + ")"))
|
|
, filename(filename_)
|
|
, format_name(format_name_)
|
|
{
|
|
StorageInMemoryMetadata storage_metadata;
|
|
|
|
size_t total_bytes_to_read; // its value isn't used as we are not reading files (just listing them). But it is required by getPathsList
|
|
paths = StorageFile::getPathsList(filename_, context->getUserFilesPath(), context, total_bytes_to_read);
|
|
|
|
if (columns_.empty())
|
|
{
|
|
ColumnsDescription columns;
|
|
if (format_name == "auto")
|
|
std::tie(columns, format_name) = StorageFile::getTableStructureAndFormatFromFile(paths, compression_method, std::nullopt, context);
|
|
else
|
|
columns = StorageFile::getTableStructureFromFile(format_name, paths, compression_method, std::nullopt, context);
|
|
|
|
storage_metadata.setColumns(columns);
|
|
}
|
|
else
|
|
{
|
|
if (format_name == "auto")
|
|
format_name = StorageFile::getTableStructureAndFormatFromFile(paths, compression_method, std::nullopt, context).second;
|
|
storage_metadata.setColumns(columns_);
|
|
}
|
|
|
|
storage_metadata.setConstraints(constraints_);
|
|
setInMemoryMetadata(storage_metadata);
|
|
setVirtuals(VirtualColumnUtils::getVirtualsForFileLikeStorage(storage_metadata.getColumns()));
|
|
}
|
|
|
|
void StorageFileCluster::updateQueryToSendIfNeeded(DB::ASTPtr & query, const 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 fileCluster, got '{}'", queryToString(query));
|
|
|
|
TableFunctionFileCluster::updateStructureAndFormatArgumentsIfNeeded(
|
|
expression_list->children, storage_snapshot->metadata->getColumns().getAll().toNamesAndTypesDescription(), format_name, context);
|
|
}
|
|
|
|
RemoteQueryExecutor::Extension StorageFileCluster::getTaskIteratorExtension(const ActionsDAG::Node * predicate, const ContextPtr & context) const
|
|
{
|
|
auto iterator = std::make_shared<StorageFileSource::FilesIterator>(paths, std::nullopt, predicate, getVirtualsList(), context);
|
|
auto callback = std::make_shared<TaskIterator>([iter = std::move(iterator)]() mutable -> String { return iter->next(); });
|
|
return RemoteQueryExecutor::Extension{.task_iterator = std::move(callback)};
|
|
}
|
|
|
|
}
|