BIT datatype tests

localtests/bit-add/create.sql

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+drop table if exists gh_ost_test;
+create table gh_ost_test (
+  id int auto_increment,
+  i int 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 values (null, 11);
+  insert into gh_ost_test values (null, 13);
+end ;;

localtests/bit-add/extra_args

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+--alter="add column is_good bit null default 0" 

localtests/bit-add/ghost_columns

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+id, i

localtests/bit-add/orig_columns

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+id, i

localtests/bit-dml/create.sql

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+drop table if exists gh_ost_test;
+create table gh_ost_test (
+  id int auto_increment,
+  i int not null,
+  is_good bit null default 0,
+  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 values (null, 11, 0);
+  insert into gh_ost_test values (null, 13, 1);
+  insert into gh_ost_test values (null, 17, 1);
+
+  update gh_ost_test set is_good=0 where i=13 order by id desc limit 1;
+end ;;

localtests/bit-dml/extra_args

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+--alter="modify column is_good bit not null default 0" --approve-renamed-columns