| commit | ac439c09d5b1cbdbdffe0f91767c0e31d6f4f9c6 | [log] [tgz] |
|---|---|---|
| author | Shawn O. Pearce <sop@google.com> | Sat Nov 22 21:59:04 2008 -0800 |
| committer | Shawn O. Pearce <sop@google.com> | Sat Nov 22 21:59:04 2008 -0800 |
| tree | 380c75bd7630f79558345105d3871b90b7c852b5 | |
| parent | ddb91ca3a08447bffecc9f727ede6fc346ec7d2c [diff] |
Add support for secondary entity keys On SQL traditional databases these can create a UNIQUE constraint, ensuring there aren't any duplicates. In a pure b-tree sort of implementation we might have to emulate these, or simply have a query use "LIMIT 2" and fail if we get a second row. Signed-off-by: Shawn O. Pearce <sop@google.com>