Hello All!
I wish I'll find an answer for my imported question.
We'll do a OS migration from AIX/Oracle to Windows/ORacle.
In source system there are some custom tables as normal. But some of these custom tables are used by Oracle level programs(import some records or check some values).
In some of that tables for some columns, it has a NULL atributes, so We can insert NULL value (not space) in oracle level.
After R3load based copy, we saw that all this NULL columns changed to NOT NULL with a default value.
We found that Both STR and APPLx.SQL files has a record with a NOT NULL constraint for this columns. As a try we changed STR and APPLx.SQL files as NULL constraint for this special columns.
We tried to export and import this tables with R3load again. In target system we saw that table is created with NULL constraint. But there is no NULL value.
Default value is added for this columns.
Do you have any idea?