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create table t1 (a int, b int default (a+1));
insert t1 values (1,10), (2,20), (3,30);
connect con1, localhost, root;
select a,b,default(b) from t1;
a b default(b)
1 10 2
2 20 3
3 30 4
set debug_sync='after_Item_default_value_calculate WAIT_FOR go';
select a,b,default(b) from t1;
connection default;
set debug_sync='ha_write_row_start SIGNAL go';
insert t1 values (100,default(b));
connection con1;
a b default(b)
1 10 2
2 20 3
3 30 4
connection default;
drop table t1;
set debug_sync='RESET';
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