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