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#include "Storages/StorageAzureBlobCluster.h"
#include "clickhouse_config.h"
#if USE_AZURE_BLOB_STORAGE
#include <Interpreters/AddDefaultDatabaseVisitor.h>
#include <Interpreters/InterpreterSelectQuery.h>
#include <Processors/Sources/RemoteSource.h>
#include <Processors/Transforms/AddingDefaultsTransform.h>
#include <QueryPipeline/RemoteQueryExecutor.h>
#include <Storages/IStorage.h>
#include <Storages/StorageURL.h>
#include <Storages/StorageDictionary.h>
#include <Storages/extractTableFunctionArgumentsFromSelectQuery.h>
#include <Storages/VirtualColumnUtils.h>
#include <Common/Exception.h>
#include <Parsers/queryToString.h>
#include <TableFunctions/TableFunctionAzureBlobStorageCluster.h>
#include <memory>
#include <string>
namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
}
StorageAzureBlobCluster::StorageAzureBlobCluster(
const String & cluster_name_,
const StorageAzureBlob::Configuration & configuration_,
std::unique_ptr<AzureObjectStorage> && object_storage_,
const StorageID & table_id_,
const ColumnsDescription & columns_,
const ConstraintsDescription & constraints_,
ContextPtr context_,
bool structure_argument_was_provided_)
: IStorageCluster(cluster_name_, table_id_, &Poco::Logger::get("StorageAzureBlobCluster (" + table_id_.table_name + ")"), structure_argument_was_provided_)
, configuration{configuration_}
, object_storage(std::move(object_storage_))
{
context_->getGlobalContext()->getRemoteHostFilter().checkURL(configuration_.getConnectionURL());
StorageInMemoryMetadata storage_metadata;
if (columns_.empty())
{
/// `format_settings` is set to std::nullopt, because StorageAzureBlobCluster is used only as table function
auto columns = StorageAzureBlob::getTableStructureFromData(object_storage.get(), configuration, /*format_settings=*/std::nullopt, context_, false);
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 StorageAzureBlobCluster::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 s3Cluster, got '{}'", queryToString(query));
TableFunctionAzureBlobStorageCluster::addColumnsStructureToArguments(expression_list->children, structure, context);
}
RemoteQueryExecutor::Extension StorageAzureBlobCluster::getTaskIteratorExtension(ASTPtr query, const ContextPtr & context) const
{
auto iterator = std::make_shared<StorageAzureBlobSource::GlobIterator>(
object_storage.get(), configuration.container, configuration.blob_path,
query, virtual_columns, context, nullptr);
auto callback = std::make_shared<std::function<String()>>([iterator]() mutable -> String{ return iterator->next().relative_path; });
return RemoteQueryExecutor::Extension{ .task_iterator = std::move(callback) };
}
NamesAndTypesList StorageAzureBlobCluster::getVirtuals() const
{
return virtual_columns;
}
}
#endif
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