mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-16 03:12:43 +00:00
38 lines
1.0 KiB
C++
38 lines
1.0 KiB
C++
#pragma once
|
|
|
|
#include <TableFunctions/ITableFunctionFileLike.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
/* file(path, format[, structure, compression]) - creates a temporary storage from file
|
|
*
|
|
* The file must be in the clickhouse data directory.
|
|
* The relative path begins with the clickhouse data directory.
|
|
*/
|
|
class TableFunctionFile : public ITableFunctionFileLike
|
|
{
|
|
public:
|
|
static constexpr auto name = "file";
|
|
std::string getName() const override
|
|
{
|
|
return name;
|
|
}
|
|
|
|
ColumnsDescription getActualTableStructure(ContextPtr context) const override;
|
|
|
|
protected:
|
|
int fd = -1;
|
|
void parseFirstArguments(const ASTPtr & arg, ContextPtr context) override;
|
|
String getFormatFromFirstArgument() override;
|
|
|
|
private:
|
|
StoragePtr getStorage(
|
|
const String & source, const String & format_, const ColumnsDescription & columns, ContextPtr global_context,
|
|
const std::string & table_name, const std::string & compression_method_) const override;
|
|
const char * getStorageTypeName() const override { return "File"; }
|
|
};
|
|
|
|
}
|