MDEV-21747 needless alter_ctx arg in prep_alter_part_table()

sql/sql_partition.cc

@@ -4805,7 +4805,6 @@ static void check_datadir_altered_for_innodb(THD *thd,
 
 uint prep_alter_part_table(THD *thd, TABLE *table, Alter_info *alter_info,
                            HA_CREATE_INFO *create_info,
-                           Alter_table_ctx *alter_ctx,
                            bool *partition_changed,
                            bool *fast_alter_table)
 {
@@ -4900,8 +4899,8 @@ uint prep_alter_part_table(THD *thd, TABLE *table, Alter_info *alter_info,
       object to allow fast_alter_partition_table to perform the changes.
     */
     DBUG_ASSERT(thd->mdl_context.is_lock_owner(MDL_key::TABLE,
-                                               alter_ctx->db.str,
-                                               alter_ctx->table_name.str,
+                                               table->s->db.str,
+                                               table->s->table_name.str,
                                                MDL_INTENTION_EXCLUSIVE));
 
     tab_part_info= table->part_info;

sql/sql_partition.h

@@ -262,7 +262,6 @@ bool set_part_state(Alter_info *alter_info, partition_info *tab_part_info,
                     enum partition_state part_state);
 uint prep_alter_part_table(THD *thd, TABLE *table, Alter_info *alter_info,
                            HA_CREATE_INFO *create_info,
-                           Alter_table_ctx *alter_ctx,
                            bool *partition_changed,
                            bool *fast_alter_table);
 char *generate_partition_syntax(THD *thd, partition_info *part_info,

sql/sql_table.cc

@@ -9892,8 +9892,7 @@ do_continue:;
   bool fast_alter_partition= false;
   {
     if (prep_alter_part_table(thd, table, alter_info, create_info,
-                              &alter_ctx, &partition_changed,
-                              &fast_alter_partition))
+                              &partition_changed, &fast_alter_partition))
     {
       DBUG_RETURN(true);
     }