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#pragma once
#include <Storages/System/IStorageSystemOneBlock.h>
namespace DB
{
class Context;
/** Implements system table 'columns', that allows to get information about columns for every table.
*/
class StorageSystemColumns final : public IStorage
{
public:
explicit StorageSystemColumns(const StorageID & table_id_);
std::string getName() const override { return "SystemColumns"; }
Pipe read(
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) override;
bool isSystemStorage() const override { return true; }
};
}
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