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pg v0.3.0.0 Release Notes

Release Date: 2013-03-25 // about 11 years ago

    • Added support for PostgreSQL's Array Types. Thanks to Jason Dusek for his work on this feature.

    • Added a brand new TypeInfo system that gives FromField instances convenient and efficient access to the pg_type metatable. This replaced the older typename cache, and was neccesary to properly support postgres array types. Thanks to Bas van Dijk for his work on this feature.

    • Changed the type of the fromField and fromRow methods to allow a restricted set of IO actions, and stopped pre-calculating the type name of every column. As a result, the type of the typename operator changed from Field -> ByteString to Field -> Conversion ByteString, where Conversion is the new monad that conversion computations run inside.

    • Improved the documentation of the FromField module.

    • Added the Database.PostgreSQL.Simple.Errors module, which offers some predicates and functions for interpreting SqlError values, courtesy of Leonid Onokhov.

    • Added a the name of a column and the associated table's object identifier to ResultError exceptions, courtesy of Jeff Chu.

    • Moved most of the more detailed transaction operators into the Database.PostgreSQL.Simple.Transaction module.

    • Changed withTransactionModeRetry to accept a predicate of which SqlErrors to retry, due to the fact that serialization errors can sometimes manifest themselves as constraint violations. Thanks to Oliver Charles for pointing this out and implementing the change.

    • Added simple tests of the fold operator, thanks to Joey Adams.

    • Added simple tests of the array conversion code.

    • Added recognition of -- comments in the quasiquoter, which are now stripped out.