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Slaq is a port of Stephan Zeiger's excellent ScalaQuery, a type-safe database query API for Scala, similar to FRM (Functional Relational Mapper) libraries like Slick and Quill.

Changes to-date:

  • added support for Scala 2.13
  • added support for multiple table (outer) joins, mirroring sql join syntax
  • automatic mapping of user defined value classes to underlying primitve type
  • take/drop queries are now cacheable
  • map/flatMap Parameterscall has been renamed to Params
  • threadLocalSession has been removed
  • deprecated != conditional operator has been removed
  • =~, =!, &, and | are now available as alternatives to ===, =!=, &&, and ||
  • MS Access and Derby support have been removed
  • myriad refactorings that improve performance compared to original implementation

It includes the following features:

  • Session management based on JDBC Connections
  • Type-safe queries based on a query monad and combinators
  • Simple static and dynamic queries

The following database systems are directly supported for type-safe queries:

  • PostgreSQL
  • MySQL
  • Microsoft SQL Server
  • H2
  • HSQLDB/HyperSQL
  • Derby/JavaDB
  • SQLite Accessing other database systems is possible, with a reduced feature set.

Licensing conditions (BSD-style) can be found in LICENSE.txt.

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Scala Language Applied Queries

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