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#include "Interpreters/Context_fwd.h"
#include <Storages/StorageURLCluster.h>
#include <Core/QueryProcessingStage.h>
#include <DataTypes/DataTypeString.h>
#include <Interpreters/getHeaderForProcessingStage.h>
#include <Interpreters/InterpreterSelectQuery.h>
#include <Interpreters/TranslateQualifiedNamesVisitor.h>
#include <Interpreters/AddDefaultDatabaseVisitor.h>
#include <QueryPipeline/RemoteQueryExecutor.h>
#include <Processors/Transforms/AddingDefaultsTransform.h>
#include <Processors/Sources/RemoteSource.h>
#include <Parsers/queryToString.h>
#include <Storages/IStorage.h>
#include <Storages/SelectQueryInfo.h>
#include <Storages/StorageURL.h>
#include <Storages/extractTableFunctionArgumentsFromSelectQuery.h>
#include <Storages/VirtualColumnUtils.h>
#include <TableFunctions/TableFunctionURLCluster.h>
#include <memory>
namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
}
StorageURLCluster::StorageURLCluster(
ContextPtr context_,
const String & cluster_name_,
const String & uri_,
const String & format_,
const String & compression_method_,
const StorageID & table_id_,
const ColumnsDescription & columns_,
const ConstraintsDescription & constraints_,
const StorageURL::Configuration & configuration_,
bool structure_argument_was_provided_)
: IStorageCluster(cluster_name_, table_id_, &Poco::Logger::get("StorageURLCluster (" + table_id_.table_name + ")"), structure_argument_was_provided_)
, uri(uri_)
{
context_->getRemoteHostFilter().checkURL(Poco::URI(uri));
context_->getHTTPHeaderFilter().checkHeaders(configuration_.headers);
StorageInMemoryMetadata storage_metadata;
if (columns_.empty())
{
auto columns = StorageURL::getTableStructureFromData(format_,
uri,
chooseCompressionMethod(Poco::URI(uri).getPath(), compression_method_),
configuration_.headers,
std::nullopt,
context_);
storage_metadata.setColumns(columns);
}
else
storage_metadata.setColumns(columns_);
storage_metadata.setConstraints(constraints_);
setInMemoryMetadata(storage_metadata);
virtual_columns = VirtualColumnUtils::getPathAndFileVirtualsForStorage(storage_metadata.getSampleBlock().getNamesAndTypesList());
}
void StorageURLCluster::addColumnsStructureToQuery(ASTPtr & query, const String & structure, const ContextPtr & context)
{
ASTExpressionList * expression_list = extractTableFunctionArgumentsFromSelectQuery(query);
if (!expression_list)
throw Exception(ErrorCodes::LOGICAL_ERROR, "Expected SELECT query from table function urlCluster, got '{}'", queryToString(query));
TableFunctionURLCluster::addColumnsStructureToArguments(expression_list->children, structure, context);
}
RemoteQueryExecutor::Extension StorageURLCluster::getTaskIteratorExtension(ASTPtr query, const ContextPtr & context) const
{
auto iterator = std::make_shared<StorageURLSource::DisclosedGlobIterator>(uri, context->getSettingsRef().glob_expansion_max_elements, query, virtual_columns, context);
auto callback = std::make_shared<TaskIterator>([iter = std::move(iterator)]() mutable -> String { return iter->next(); });
return RemoteQueryExecutor::Extension{.task_iterator = std::move(callback)};
}
}
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