YQL-19747: Improve and fix completon engine

Played with the autocomplete and found some issues:
https://nda.ya.ru/t/1F9ioYe37HVwo2.

- Supported `min`, `max` parameters of the `RANGE` table
  function, respecting `prefix`.
- Supported cluster detecton at table function, e.g.
  `SELECT * FROM plato.RANGE(Input1, Input2)`.
- Made column filter not to ignore a table alias.
- Supported keyword as identifier parsing.
- Supported `ID_QUOTED` as table alias.
commit_hash:9e9ff13373cd059e6a240ddff0ae18f599d790c0

1 files changed, 14 insertions, 4 deletions

diff --git a/yql/essentials/sql/v1/complete/analysis/global/global.cpp b/yql/essentials/sql/v1/complete/analysis/global/global.cpp
index f97c940bed4..95a260ee973 100644
--- a/yql/essentials/sql/v1/complete/analysis/global/global.cpp
+++ b/yql/essentials/sql/v1/complete/analysis/global/global.cpp
@@ -171,7 +171,7 @@ namespace NSQLComplete {
 
             ctx.Use = FindUseStatement(parsed, nodes);
             ctx.Names = Keys(nodes);
-            ctx.EnclosingFunction = EnclosingFunction(parsed);
+            ctx.EnclosingFunction = EnclosingFunction(parsed, nodes);
             ctx.Column = InferColumnContext(parsed, nodes);
 
             if (ctx.Use && ctx.Column) {
@@ -206,10 +206,10 @@ namespace NSQLComplete {
             return keys;
         }
 
-        void EnrichTableClusters(TColumnContext& column, const TUseContext& use) {
+        void EnrichTableClusters(TColumnContext& column, const TClusterContext& use) {
             for (auto& table : column.Tables) {
                 if (table.Cluster.empty()) {
-                    table.Cluster = use.Cluster;
+                    table.Cluster = use.Name;
                 }
             }
         }
@@ -252,10 +252,20 @@ namespace NSQLComplete {
 } // namespace NSQLComplete
 
 template <>
+void Out<NSQLComplete::TClusterContext>(IOutputStream& out, const NSQLComplete::TClusterContext& value) {
+    if (!value.Provider.empty()) {
+        out << value.Provider << ":";
+    }
+    out << value.Name;
+}
+
+template <>
 void Out<NSQLComplete::TFunctionContext>(IOutputStream& out, const NSQLComplete::TFunctionContext& value) {
     out << "TFunctionContext { ";
     out << "Name: " << value.Name;
-    out << ", Args: " << value.ArgumentNumber;
+    out << ", ArgN: " << value.ArgumentNumber;
+    out << ", Arg0: " << value.Arg0.GetOrElse("None");
+    out << ", Cluster: " << value.Cluster;
     out << " }";
 }