Update indexes.md #4837
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Update indexes.md #4837
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bertday
commented
Feb 18, 2025
| @@ -10,13 +10,13 @@ DuckDB has two built-in index types. Indexes can also be defined via [extensions | |||
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| ### Min-Max Index (Zonemap) | |||
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| A [min-max index](https://en.wikipedia.org/wiki/Block_Range_Index) (also known as zonemap and block range index) is automatically created for columns of all [general-purpose data types]({% link docs/sql/data_types/overview.md %}). | |||
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"also known as X or Y" is a bit more natural here
bertday
commented
Feb 18, 2025
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| ### Adaptive Radix Tree (ART) | ||
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| An [Adaptive Radix Tree (ART)](https://db.in.tum.de/~leis/papers/ART.pdf) is mainly used to ensure primary key constraints and to speed up point and very highly selective (i.e., < 0.1%) queries. ART indexes are automatically created for columns with a `UNIQUE` or `PRIMARY KEY` constraint and can be defined using `CREATE INDEX`. | ||
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| > Warning ART indexes must currently be able to fit in-memory during index creation. Avoid creating ART indexes if the index does not fit in memory during index creation. |
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removed unnecessary hyphen; also makes it consistent with "in memory" in the following sentence
bertday
commented
Feb 18, 2025
| @@ -42,7 +42,7 @@ ART indexes create a secondary copy of the data in a second location – this co | |||
| `UPDATE` statements on indexed columns are transformed into a `DELETE` of the original row followed by an `INSERT` of the updated row. | |||
| This rewrite has performance implications, particularly for wide tables, as entire rows are rewritten instead of only the affected columns. | |||
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| Additionally, it causes the following constraint checking limitation of `UPDATE` statements. The same limitation exists in other DBMSs, like postgres. | |||
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Postgres should be uppercase
szarnyasg
reviewed
Feb 18, 2025
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These are great! Thanks a lot! |
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Minor style edits