MDEV-17137: Syntax errors with VIEW using MEDIAN

The syntax error happened because we had not implemented a different print for
percentile functions. The syntax is a bit different when we use percentile functions
as window functions in comparision to normal window functions.
Implemented a seperate print function for percentile functions

1 files changed, 16 insertions, 3 deletions

diff --git a/sql/sql_window.cc b/sql/sql_window.cc
index 38fdd8ab80b..e4d69f2fa5e 100644
--- a/sql/sql_window.cc
+++ b/sql/sql_window.cc
@@ -82,19 +82,32 @@ void
 Window_spec::print(String *str, enum_query_type query_type)
 {
   str->append('(');
+  print_partition(str, query_type);
+  print_order(str, query_type);
+
+  if (window_frame)
+    window_frame->print(str, query_type);
+  str->append(')');
+}
+
+void
+Window_spec::print_partition(String *str, enum_query_type query_type)
+{
   if (partition_list->first)
   {
     str->append(STRING_WITH_LEN(" partition by "));
     st_select_lex::print_order(str, partition_list->first, query_type);
   }
+}
+
+void
+Window_spec::print_order(String *str, enum_query_type query_type)
+{
   if (order_list->first)
   {
     str->append(STRING_WITH_LEN(" order by "));
     st_select_lex::print_order(str, order_list->first, query_type);
   }
-  if (window_frame)
-    window_frame->print(str, query_type);
-  str->append(')');
 }
 
 bool