#include "StorageLoop.h" #include #include #include #include namespace DB { namespace ErrorCodes { } StorageLoop::StorageLoop( const StorageID & table_id_, StoragePtr inner_storage_) : IStorage(table_id_) , inner_storage(std::move(inner_storage_)) { StorageInMemoryMetadata storage_metadata = inner_storage->getInMemoryMetadata(); setInMemoryMetadata(storage_metadata); } void StorageLoop::read( QueryPlan & query_plan, const Names & column_names, const StorageSnapshotPtr & storage_snapshot, SelectQueryInfo & query_info, ContextPtr context, QueryProcessingStage::Enum processed_stage, size_t max_block_size, size_t num_streams) { query_info.optimize_trivial_count = false; QueryPlan temp_query_plan(std::move(query_plan)); for (size_t i = 0; i < 10; ++i) { QueryPlan swapped_query_plan; std::swap(temp_query_plan, swapped_query_plan); inner_storage->read(temp_query_plan, column_names, storage_snapshot, query_info, context, processed_stage, max_block_size, num_streams); // std::cout << "Loop iteration: " << (i + 1) << std::endl; } query_plan = std::move(temp_query_plan); } void registerStorageLoop(StorageFactory & factory) { factory.registerStorage("Loop", [](const StorageFactory::Arguments & args) { StoragePtr inner_storage; return std::make_shared(args.table_id, inner_storage); }); } }