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99 lines
3.8 KiB
C++
99 lines
3.8 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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const 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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: IStorageCluster(cluster_name_, table_id_, getLogger("StorageURLCluster (" + table_id_.table_name + ")"))
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, uri(uri_), format_name(format_)
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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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ColumnsDescription columns;
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if (format_name == "auto")
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std::tie(columns, format_name) = StorageURL::getTableStructureAndFormatFromData(
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uri, chooseCompressionMethod(Poco::URI(uri).getPath(), compression_method), configuration_.headers, std::nullopt, context);
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else
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columns = StorageURL::getTableStructureFromData(
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format_, uri, chooseCompressionMethod(Poco::URI(uri).getPath(), compression_method), configuration_.headers, std::nullopt, context);
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storage_metadata.setColumns(columns);
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}
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else
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{
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if (format_name == "auto")
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format_name = StorageURL::getTableStructureAndFormatFromData(
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uri, chooseCompressionMethod(Poco::URI(uri).getPath(), compression_method), configuration_.headers, std::nullopt, context).second;
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storage_metadata.setColumns(columns_);
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}
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storage_metadata.setConstraints(constraints_);
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setInMemoryMetadata(storage_metadata);
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setVirtuals(VirtualColumnUtils::getVirtualsForFileLikeStorage(storage_metadata.getColumns()));
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}
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void StorageURLCluster::updateQueryToSendIfNeeded(ASTPtr & query, const StorageSnapshotPtr & storage_snapshot, 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::updateStructureAndFormatArgumentsIfNeeded(
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expression_list->children, storage_snapshot->metadata->getColumns().getAll().toNamesAndTypesDescription(), format_name, context);
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}
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RemoteQueryExecutor::Extension StorageURLCluster::getTaskIteratorExtension(const ActionsDAG::Node * predicate, 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, predicate, getVirtualsList(), 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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