Information Needed For Generated SQL

Question

Hi,
I have done some odi projects.In most of the RT operation when I check the code in operator I saw that:
insert into ...when 1=1;
or
select ..from.. where 1=1;
What does it mean by 1=1??
there is no variable in when or where condition.
Please Ans
Thanks

Answer 1

Hi Papai,
1=1 is a condition that is always true and that sometimes used in queries.
ODI uses it in generated code to have valid queries with or without filters. Adding a filter will add a string : "AND filter_condition".
Without filter:
select * from table
where 1 = 1
;which is the same as select * from table;
Add a filter :
select * from table
where 1 = 1
and col1 = 42
;Always-false conditions are also sometimes used by SQL developers. If you want to duplicate a table structure without duplicating data :
create table2 as
select * from table1
where 1 = 2;No rows returned, so no rows in the new table but the structure is the same :).
Hope it helps.
Regards,
JeromeFr