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#pragma once
#include <Storages/IStorage.h>
#include <Processors/Sources/ShellCommandSource.h>
#include <Storages/ExecutableSettings.h>
namespace DB
{
/**
* This class represents table engine for external executable files.
* Executable storage that will start process for read.
* ExecutablePool storage maintain pool of processes and take process from pool for read.
*/
class StorageExecutable final : public IStorage
{
public:
StorageExecutable(
const StorageID & table_id,
const String & format,
const ExecutableSettings & settings,
const std::vector<ASTPtr> & input_queries,
const ColumnsDescription & columns,
const ConstraintsDescription & constraints);
String getName() const override
{
if (settings.is_executable_pool)
return "ExecutablePool";
else
return "Executable";
}
void 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 threads) override;
private:
ExecutableSettings settings;
std::vector<ASTPtr> input_queries;
Poco::Logger * log;
std::unique_ptr<ShellCommandSourceCoordinator> coordinator;
};
}
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