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How Dolt Stores Table Data | DoltHub Blog

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Blog for DoltHub, a website hosting databases made with Dolt, an open-source version-controlled SQL database with Git-like semantics.

Dolt is Git for data . It’s a SQL database that lets you clone, branch, diff, merge, and fork your data just like you can with a filesystem tree in Git. This blog post explores one of the fundamental datastructures that underlies Dolt’s implementation of SQL tables. What We Need # Dolt currently supports a subset of SQL where every table must have a primary key. The SQL layer is implemented on top of a table storage layer that models a key-value store, where keys and values are both byte arrays. To efficiently implement the Git for data portions of Dolt , we need certain unique properties from

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