diff --git a/e2e_test/batch/basic/dml_update.slt.part b/e2e_test/batch/basic/dml_update.slt.part
new file mode 100644
index 0000000000000..cff0f23955b7d
--- /dev/null
+++ b/e2e_test/batch/basic/dml_update.slt.part
@@ -0,0 +1,108 @@
+# Extension to `dml.slt.part` for testing advanced `UPDATE` statements.
+
+statement ok
+SET RW_IMPLICIT_FLUSH TO true;
+
+statement ok
+create table t (v1 int default 1919, v2 int default 810);
+
+statement ok
+insert into t values (114, 514);
+
+
+# Single assignment, to subquery.
+statement ok
+update t set v1 = (select 666);
+
+query II
+select * from t;
+----
+666 514
+
+# Single assignment, to runtime-cardinality subquery returning 1 row.
+statement ok
+update t set v1 = (select generate_series(888, 888));
+
+query II
+select * from t;
+----
+888 514
+
+# Single assignment, to runtime-cardinality subquery returning 0 rows (set to NULL).
+statement ok
+update t set v1 = (select generate_series(1, 0));
+
+query II
+select * from t;
+----
+NULL 514
+
+# Single assignment, to runtime-cardinality subquery returning multiple rows.
+statement error Scalar subquery produced more than one row
+update t set v1 = (select generate_series(1, 2));
+
+# Single assignment, to correlated subquery.
+statement ok
+update t set v1 = (select count(*) from t as source where source.v2 = t.v2);
+
+query II
+select * from t;
+----
+1 514
+
+# Single assignment, to subquery with mismatched column count.
+statement error must return only one column
+update t set v1 = (select 666, 888);
+
+
+
+# Multiple assignment clauses.
+statement ok
+update t set v1 = 1919, v2 = 810;
+
+query II
+select * from t;
+----
+1919 810
+
+# Multiple assignments to the same column.
+statement error multiple assignments to the same column
+update t set v1 = 1, v1 = 2;
+
+statement error multiple assignments to the same column
+update t set (v1, v1) = (1, 2);
+
+statement error multiple assignments to the same column
+update t set (v1, v2) = (1, 2), v2 = 2;
+
+# Multiple assignments, to subquery.
+statement ok
+update t set (v1, v2) = (select 666, 888);
+
+query II
+select * from t;
+----
+666 888
+
+# Multiple assignments, to subquery with cast.
+statement ok
+update t set (v1, v2) = (select 888.88, 999);
+
+query II
+select * from t;
+----
+889 999
+
+# Multiple assignments, to subquery with cast failure.
+# TODO: this currently shows `cannot cast type "record" to "record"` because we wrap the subquery result
+#       into a struct, which is not quite clear.
+statement error cannot cast type
+update t set (v1, v2) = (select '888.88', 999);
+
+# Multiple assignments, to subquery with mismatched column count.
+statement error number of columns does not match number of values
+update t set (v1, v2) = (select 666);
+
+
+statement ok
+drop table t;