Persistent storage, SQL, and NoSQL

The libraries in this subsection are as follows:

  • acid-state and safecopy: These libraries go hand in hand, giving a lightweight, disk-stored database of Haskell values with strong ACID guarantees and migrations.
  • persistent: A by-product of the Yesod web framework, persistent is a backend-agnostic high-level query abstraction over SQL-like databases. Provides type-safe models with automatic schema migrations.
  • esqueleto: Add type-safe SQL query EDSL that works with the persistent library and its models.
  • HDBC: A SQL database abstraction layer similar to persistent except lower level. Provides transactions and marshalling of SQL values to Haskell values and the other way around.
  • HDBC-odbc: Hook any ODBC-enabled database ...

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