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#pragma once
#include <TableFunctions/ITableFunctionFileLike.h>
#include <Storages/StorageURL.h>
#include <IO/ReadWriteBufferFromHTTP.h>
namespace DB
{
class Context;
/* url(source, [format, structure, compression]) - creates a temporary storage from url.
*/
class TableFunctionURL : public ITableFunctionFileLike
{
public:
static constexpr auto name = "url";
static constexpr auto signature = " - uri\n"
" - uri, format\n"
" - uri, format, structure\n"
" - uri, format, structure, compression_method\n"
"All signatures supports optional headers (specified as `headers('name'='value', 'name2'='value2')`)";
String getName() const override
{
return name;
}
String getSignature() const override
{
return signature;
}
ColumnsDescription getActualTableStructure(ContextPtr context, bool is_insert_query) const override;
static void addColumnsStructureToArguments(ASTs & args, const String & desired_structure, const ContextPtr & context);
protected:
void parseArguments(const ASTPtr & ast, ContextPtr context) override;
void parseArgumentsImpl(ASTs & args, const ContextPtr & context) override;
StorageURL::Configuration configuration;
private:
std::vector<size_t> skipAnalysisForArguments(const QueryTreeNodePtr & query_node_table_function, ContextPtr context) const override;
StoragePtr getStorage(
const String & source, const String & format_, const ColumnsDescription & columns, ContextPtr global_context,
const std::string & table_name, const String & compression_method_) const override;
const char * getStorageTypeName() const override { return "URL"; }
String getFormatFromFirstArgument() override;
};
}
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