feat: add insert into logical plan in request (#231)

* feat: insert into logical plan

* chore: make all

* feat: use TableName instead

* chore: make all

* chore: per review

proto/greptime/v1/database.proto

@@ -54,9 +54,17 @@ message QueryRequest {
     string sql = 1;
     bytes logical_plan = 2;
     PromRangeQuery prom_range_query = 3;
+    InsertIntoPlan insert_into_plan = 4;
   }
 }
 
+// A temporary solution for executing insert into table SELECT .. with logical plan
+// since substrait to logical plan doesn't support dml yet.
+message InsertIntoPlan {
+  TableName table_name = 1;
+  bytes logical_plan = 2;
+}
+
 message InsertRequests { repeated InsertRequest inserts = 1; }
 
 message InsertRequest {