MDEV-22241 Revert renaming of LEX::set_limit_rows_examined() as it breaks compatibility with ColumnStore

Author: mariadb-OlegSmirnov

sql/sql_lex.h

@@ -3600,7 +3600,7 @@ struct LEX: public Query_tables_list
     Activates enforcement of the LIMIT ROWS EXAMINED clause, if present
     in the query.
   */
-  void activate_limit_rows_examined()
+  void set_limit_rows_examined()
   {
     if (limit_rows_examined)
       limit_rows_examined_cnt= limit_rows_examined->val_uint();

sql/sql_select.cc

@@ -4799,7 +4799,7 @@ void JOIN::exec_inner()
 
   if (!select_lex->outer_select() &&                            // (1)
       select_lex != select_lex->master_unit()->fake_select_lex) // (2)
-    thd->lex->activate_limit_rows_examined();
+    thd->lex->set_limit_rows_examined();
 
   if (procedure)
   {
@@ -26755,7 +26755,7 @@ JOIN_TAB::remove_duplicates()
                                   sort_field_keylength, having);
 
   if (join->select_lex != join->select_lex->master_unit()->fake_select_lex)
-    thd->lex->activate_limit_rows_examined();
+    thd->lex->set_limit_rows_examined();
   free_blobs(first_field);
   my_free(sortorder);
   DBUG_RETURN(error);

sql/sql_union.cc

@@ -2180,7 +2180,7 @@ bool st_select_lex_unit::exec()
   // Handle cleanup on scope exit
   SCOPE_EXIT([this, &limit_rows_was_activated, &examined_rows]() {
     if (limit_rows_was_activated)
-      thd->lex->activate_limit_rows_examined();
+      thd->lex->set_limit_rows_examined();
     if (!saved_error)
       thd->inc_examined_row_count(examined_rows);
   });