Oracle: specifying default value for object type column
Looks like this is not possible.
One workaround would be to use a trigger:
CREATE OR REPLACE TRIGGER test_trigger BEFORE INSERT OR UPDATEON test_table FOR EACH ROWWHEN ( new.test_attr IS NULL )BEGIN :new.test_attr := NEW test_t();END test_trigger;/It does not completely ignore non-default constructors by the way, overriding the default constructor
CONSTRUCTOR FUNCTION test_t(in_val NUMBER)RETURN SELF AS RESULTleads to an exception when trying to define the table with DEFAULT NEW test_t(1):
ORA-06553: PLS-307: too many declarations of 'TEST_T' match this call