MDEV-9724: Window functions: Frame Exclusion support

Produce a "not supported" error if one attempts to exclude rows

mysql-test/r/win.result

@@ -1233,6 +1233,37 @@ count(*) over (order by a
 rows between current row and 3.14 following)
 from t1;
 ERROR HY000: Integer is required for ROWS-type frame
+#
+# EXCLUDE clause is parsed but not supported 
+#
+select
+count(*) over (order by a
+rows between 1 preceding and 1 following
+exclude current row)
+from t1;
+ERROR HY000: Frame exclusion is not supported yet
+select
+count(*) over (order by a
+range between 1 preceding and 1 following
+exclude ties)
+from t1;
+ERROR HY000: Frame exclusion is not supported yet
+select
+count(*) over (order by a
+range between 1 preceding and 1 following
+exclude group)
+from t1;
+ERROR HY000: Frame exclusion is not supported yet
+select
+count(*) over (order by a
+rows between 1 preceding and 1 following
+exclude no others)
+from t1;
+count(*) over (order by a
+rows between 1 preceding and 1 following
+exclude no others)
+2
+2
 drop table t1;
 # 
 #  Window function in grouping query 

mysql-test/t/win.test

@@ -762,6 +762,38 @@ select
                  rows between current row and 3.14 following)
 from t1;
 
+--echo #
+--echo # EXCLUDE clause is parsed but not supported 
+--echo #
+
+--error ER_FRAME_EXCLUSION_NOT_SUPPORTED
+select
+  count(*) over (order by a
+                 rows between 1 preceding and 1 following
+                 exclude current row)
+from t1;
+
+--error ER_FRAME_EXCLUSION_NOT_SUPPORTED
+select
+  count(*) over (order by a
+                 range between 1 preceding and 1 following
+                 exclude ties)
+from t1;
+
+--error ER_FRAME_EXCLUSION_NOT_SUPPORTED
+select
+  count(*) over (order by a
+                 range between 1 preceding and 1 following
+                 exclude group)
+from t1;
+
+# EXCLUDE NO OTHERS means 'don't exclude anything'
+select
+  count(*) over (order by a
+                 rows between 1 preceding and 1 following
+                 exclude no others)
+from t1;
+
 drop table t1;
 
 --echo # 

sql/share/errmsg-utf8.txt

@@ -7156,4 +7156,7 @@ ER_WRONG_TYPE_FOR_ROWS_FRAME
         eng "Integer is required for ROWS-type frame"
 ER_WRONG_TYPE_FOR_RANGE_FRAME
         eng "Numeric datatype is required for RANGE-type frame"
-
+ER_FRAME_EXCLUSION_NOT_SUPPORTED
+        eng "Frame exclusion is not supported yet"
+ER_WINDOW_FUNCTION_DONT_HAVE_FRAME
+        eng "This window function may not have a window frame"

sql/sql_window.cc

@@ -127,6 +127,12 @@ setup_windows(THD *thd, Ref_ptr_array ref_pointer_array, TABLE_LIST *tables,
       DBUG_RETURN(1);
     }
     
+    if (win_spec->window_frame &&
+        win_spec->window_frame->exclusion != Window_frame::EXCL_NONE)
+    {
+      my_error(ER_FRAME_EXCLUSION_NOT_SUPPORTED, MYF(0));
+      DBUG_RETURN(1);
+    }
     /*
        For  "win_func() OVER (ORDER BY order_list RANGE BETWEEN ...)",
        - ORDER BY order_list must not be ommitted