**Use case**

```
Received exception from server (version 21.11.1):
Code: 36. DB::Exception: Received from localhost:9000. DB::Exception: Wrong index name. Cannot find index `test_pentagram` to drop.. (BAD_ARGUMENTS)

github-explorer.ru-central1.internal :) ALTER TABLE hackernews DROP INDEX text_pentagram
```

It did not show me the typo.
#pragma once
#include <base/types.h>
#include <memory>
#include <vector>
#include <Core/Field.h>
#include <Interpreters/ExpressionActions.h>
#include <Parsers/IAST_fwd.h>
#include <Storages/ColumnsDescription.h>
namespace DB
{
struct IndexDescription
{
    
    ASTPtr definition_ast;
    
    ASTPtr expression_list_ast;
    
    String name;
    
    String type;
    
    ExpressionActionsPtr expression;
    
    FieldVector arguments;
    
    Names column_names;