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email-tracker/external/duckdb/test/sql/upsert/upsert_unique_null.test
2025-10-24 19:21:19 -05:00

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SQL

# name: test/sql/upsert/upsert_unique_null.test
# group: [upsert]
statement ok
pragma enable_verification;
statement ok
create or replace table tbl (
a integer unique,
b integer
);
statement ok
insert into tbl VALUES (3,2), (1,3);
statement ok
insert into tbl(b) VALUES (5) ON CONFLICT (a) DO UPDATE SET b = 8;
# UNIQUE can be NULL, PRIMARY KEY can't be
query II
select * from tbl;
----
3 2
1 3
NULL 5
statement ok
insert into tbl(b) VALUES (5) ON CONFLICT (a) DO UPDATE SET b = 8;
# And NULL does not take part in the UNIQUE Index, so it does not activate the ON CONFLICT clause
query II
select * from tbl;
----
3 2
1 3
NULL 5
NULL 5