**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.
{
    if (type == MODIFY_TTL)
        return true;
    if (!ttl || type != MODIFY_COLUMN)
        return false;
    bool ttl_changed = true;
    for (const auto & [name, ttl_ast] : metadata.columns.getColumnTTLs())
    {
        if (name == column_name && queryToString(*ttl) == queryToString(*ttl_ast))
        {
            ttl_changed = false;
            break;
        }
    }
    return ttl_changed;
}
bool AlterCommand::isRemovingProperty() const
{
    return to_remove != RemoveProperty::NO_PROPERTY;
}
std::optional<MutationCommand> AlterCommand::tryConvertToMutationCommand(StorageInMemoryMetadata & metadata, ContextPtr context) const