News and Updates

SQLAlchemy 1.0.0b1 Released

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SQLAlchemy release 1.0.0b1 is now available.

This is the first beta release in the new 1.0 series of SQLAlchemy. Users are encouraged to ensure that their pip installations are up-to-date, so that version 1.0.0b1 will only install if explcitly specified using the --pre flag.

Release 1.0.0b1 features a large degree of internal rearchitecture, new features, and bug fixes. Key highlights include:

  • Improved Performance - Function call counts are reduced in many areas across the library, including Core execution and result set formulation, ORM query construction, ORM result set fetching, mass object expiration, and ORM persistence. The memory footprint of an ORM application is also greatly reduced by rolling out the use of __slots__ across a wide array of internal structures.
  • New Performance Features - for even more performance gains, new APIs are introduced to the ORM which can dramatically improve the performance of certain operations. See features such as Baked Queries and Bulk Insert/Update API. New documentation and examples regarding performance are added as well, including the new example performance suite.
  • New Dialect Features - In particular, the Postgresql, MySQL, and SQLite dialects have significant changes, in particular regarding improved datatype support and improved database reflection.
  • Dozens of other improvements - Small but useful improvements like removing the need for use_alter and autoload_with implies autoload=True are part of a long list of changes which can be seen in the What's new in 1.0? document.

Users should carefully review the migration document as well as the Changelog to note which behaviors and issues are affected. We'd like to thank the many contributors who helped with this release.

SQLAlchemy 1.0.0b1 is available on the Download Page.