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by TimJYoung
3341 days ago
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Re: FKs being indexed. This isn't always the case. Our embedded/workgroup-level database engine, ElevateDB, always uses a system-generated index for all PK, FK, and UNIQUE constraints. They're needed for constraint enforcement, anyways, and offer good "default" performance improvements by ensuring that the query optimizer can flip (most) inner joins in order to improve nested-loop join performance. |
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