Hi all,
I have a problem with INSERT ... ON CONFLICT sql command.
Reading 9.6 documentation i see that ON CONFLICT command will accpets only index_column_name or index_expression (unique composite/primary indexes are valid too).
So, my problem is that i can't create any type of upsert-valid index . Let me explain.
I have a table T1 containing F1, F2, F3, F4 fields.
I can insert same records in T1, MAX TWICE.
I can have records like (A,B,C,D),(B,A,D,C), etc.. and (A,B,C,D) AGAIN. Any other next insert of (A,B,C,D) is not allowed (actually it is avoided by a complex-and-slow-performance select count in before insert/update trigger).
In this case i can't create any type of primary/unique index, like a composite F1,F2, F3, F4 index. (correct me if i am wrong please).
So, how to use UPSERT in this case?
Best regards,
Agharta
