setup
CREATE TABLE t (i INT PRIMARY KEY, j INT);
----

build
ALTER TABLE t ADD UNIQUE WITHOUT INDEX (j);
----
- [[IndexData:{DescID: 104, IndexID: 1}, PUBLIC], PUBLIC]
  {indexId: 1, tableId: 104}
- [[TableData:{DescID: 104, ReferencedDescID: 100}, PUBLIC], PUBLIC]
  {databaseId: 100, tableId: 104}
- [[UniqueWithoutIndexConstraint:{DescID: 104, IndexID: 0, ConstraintID: 2, ReferencedColumnIDs: [2]}, PUBLIC], ABSENT]
  {columnIds: [2], constraintId: 2, tableId: 104}
- [[ConstraintWithoutIndexName:{DescID: 104, Name: unique_j, ConstraintID: 2}, PUBLIC], ABSENT]
  {constraintId: 2, name: unique_j, tableId: 104}
