added generated column rename test

Author: Shlomi Noach

localtests/generated-columns-rename57/create.sql

@@ -0,0 +1,30 @@
+drop table if exists gh_ost_test;
+create table gh_ost_test (
+  id int auto_increment,
+  a int not null,
+  b int not null,
+  sum_ab int as (a + b) virtual not null,
+  primary key(id)
+) auto_increment=1;
+
+drop event if exists gh_ost_test;
+delimiter ;;
+create event gh_ost_test
+  on schedule every 1 second
+  starts current_timestamp
+  ends current_timestamp + interval 60 second
+  on completion not preserve
+  enable
+  do
+begin
+  insert into gh_ost_test (id, a, b) values (null, 2,3);
+  insert into gh_ost_test (id, a, b) values (null, 2,4);
+  insert into gh_ost_test (id, a, b) values (null, 2,5);
+  insert into gh_ost_test (id, a, b) values (null, 2,6);
+  insert into gh_ost_test (id, a, b) values (null, 2,7);
+  insert into gh_ost_test (id, a, b) values (null, 2,8);
+  insert into gh_ost_test (id, a, b) values (null, 2,9);
+  insert into gh_ost_test (id, a, b) values (null, 2,0);
+  insert into gh_ost_test (id, a, b) values (null, 2,1);
+  insert into gh_ost_test (id, a, b) values (null, 2,2);
+end ;;

localtests/generated-columns-rename57/extra_args

@@ -0,0 +1 @@
+--alter="change sum_ab total_ab int as (a + b) virtual not null" --approve-renamed-columns

localtests/generated-columns-rename57/ignore_versions

@@ -0,0 +1 @@
+(5.5|5.6)