YQL-19747 Complete token sequences

Token sequences plan
- [x] [Easy] Support `GROUP BY`, `ORDER BY`.
- [x] [Easy] Support `Optional<`, `List<`, `Dict<`.
- [x] [Easy] Support `Avg(`, `Sum(`.

---
Co-authored-by: Victor Smirnov [[email protected]]

Pull Request resolved: https://github.com/ytsaurus/ytsaurus/pull/1173
commit_hash:a443dec666c486fef7f891be04d68a786be83049

1 files changed, 1 insertions, 0 deletions

diff --git a/yql/essentials/sql/v1/complete/sql_complete.cpp b/yql/essentials/sql/v1/complete/sql_complete.cpp
index b73aafe0a4f..74ddbc04154 100644
--- a/yql/essentials/sql/v1/complete/sql_complete.cpp
+++ b/yql/essentials/sql/v1/complete/sql_complete.cpp
@@ -102,6 +102,7 @@ namespace NSQLComplete {
                         return {ECandidateKind::TypeName, std::move(name.Indentifier)};
                     }
                     if constexpr (std::is_base_of_v<TFunctionName, T>) {
+                        name.Indentifier += "(";
                         return {ECandidateKind::FunctionName, std::move(name.Indentifier)};
                     }
                 }, std::move(name)));