should be it

external/duckdb/test/sql/upsert/postgres/single_key.test

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+# name: test/sql/upsert/postgres/single_key.test
+# group: [postgres]
+
+statement ok
+pragma enable_verification;
+
+# insert...on conflict do unique index inference
+
+statement ok
+create table insertconflicttest(
+	key int4,
+	fruit text,
+	unique (key)
+);
+
+# Explain tests
+
+statement ok
+insert into insertconflicttest values (0, 'Bilberry') on conflict (key) do update set fruit = excluded.fruit;
+# Should display qual actually attributable to internal sequential scan:
+
+statement ok
+insert into insertconflicttest values (0, 'Bilberry') on conflict (key) do update set fruit = excluded.fruit where insertconflicttest.fruit != 'Cawesh';
+# With EXCLUDED.* expression in scan node:
+
+statement ok
+insert into insertconflicttest values(0, 'Crowberry') on conflict (key) do update set fruit = excluded.fruit where excluded.fruit != 'Elderberry';
+# Does the same, but JSON format shows "Conflict Arbiter Index" as JSON array:
+statement ok
+insert into insertconflicttest values (0, 'Bilberry') on conflict (key) do update set fruit = excluded.fruit where insertconflicttest.fruit != 'Lime' returning *;
+
+# Fails (no unique index inference specification, required for do update variant):
+
+## -- We accept this because there is only 1 Index on the table -- ##
+statement ok
+insert into insertconflicttest values (1, 'Apple') on conflict do update set fruit = excluded.fruit;
+
+# inference succeeds:
+
+statement ok
+insert into insertconflicttest values (1, 'Apple') on conflict (key) do update set fruit = excluded.fruit;
+
+statement ok
+insert into insertconflicttest values (2, 'Orange') on conflict (key, key, key) do update set fruit = excluded.fruit;
+
+# Succeed, since multi-assignment does not involve subquery:
+
+statement ok
+INSERT INTO insertconflicttest VALUES (1, 'Apple'), (2, 'Orange')
+ON CONFLICT (key) DO UPDATE SET fruit = excluded.fruit, key = excluded.key;
+
+# Give good diagnostic message when EXCLUDED.* spuriously referenced from
+# RETURNING:
+
+## -- We don't support 'excluded' qualified columns in the RETURNING clause yet -- ##
+statement error
+insert into insertconflicttest values (1, 'Apple') on conflict (key) do update set fruit = excluded.fruit RETURNING excluded.fruit;
+----
+<REGEX>:.*Not implemented Error.*not supported in the RETURNING clause yet.*
+
+# Only suggest <table>.* column when inference element misspelled:
+
+statement error
+insert into insertconflicttest values (1, 'Apple') on conflict (keyy) do update set fruit = excluded.fruit;
+----
+<REGEX>:.*Binder Error.*Table "insertconflicttest" does not have a column.*
+
+# Have useful HINT for EXCLUDED.* RTE within UPDATE:
+
+statement error
+insert into insertconflicttest values (1, 'Apple') on conflict (key) do update set fruit = excluded.fruitt;
+----
+<REGEX>:.*Binder Error.*does not have a column named "fruitt".*
+
+# inference fails:
+
+statement error
+insert into insertconflicttest values (3, 'Kiwi') on conflict (key, fruit) do update set fruit = excluded.fruit;
+----
+<REGEX>:.*Binder Error.*not referenced by a UNIQUE/PRIMARY KEY CONSTRAINT or INDEX.*
+
+statement error
+insert into insertconflicttest values (4, 'Mango') on conflict (fruit, key) do update set fruit = excluded.fruit;
+----
+<REGEX>:.*Binder Error.*not referenced by a UNIQUE/PRIMARY KEY CONSTRAINT or INDEX.*
+
+statement error
+insert into insertconflicttest values (5, 'Lemon') on conflict (fruit) do update set fruit = excluded.fruit;
+----
+<REGEX>:.*Binder Error.*not referenced by a UNIQUE/PRIMARY KEY CONSTRAINT or INDEX.*
+
+statement error
+insert into insertconflicttest values (6, 'Passionfruit') on conflict (fruit) do update set fruit = excluded.fruit;
+----
+<REGEX>:.*Binder Error.*not referenced by a UNIQUE/PRIMARY KEY CONSTRAINT or INDEX.*
+
+# Check the target relation can be aliased
+
+statement ok
+insert into insertconflicttest AS ict values (6, 'Passionfruit') on conflict (key) do update set fruit = excluded.fruit;
+# ok, no reference to target table
+
+statement ok
+insert into insertconflicttest AS ict values (6, 'Passionfruit') on conflict (key) do update set fruit = ict.fruit;
+# ok, alias
+
+# error, references aliased away name
+statement error
+insert into insertconflicttest AS ict values (6, 'Passionfruit') on conflict (key) do update set fruit = insertconflicttest.fruit;
+----
+<REGEX>:.*Binder Error.*Referenced table.*not found.*