Monday, January 31, 2011

Teiid 7.3 Final Released

We are pleased to announce Teiid 7.3 is now available. Highlights of 7.3 features:

  • Subquery Optimization - added rewrite to INNER JOIN for applicable WHERE clause subqueries. Also added cost based SEMI and ANTI-SEMI join handling for applicable non-pushed WHERE and HAVING subqueries.
  • Updatable Views
    • Added support to perform simple pass-through and more complicated updates through views by default.
    • Added support for "FOR EACH ROW" update procedure handling (similar to INSTEAD OF triggers in other DBMS's), which should be used instead of the deprecated TRANSLATE criteria approach.
  • Temp table enhancements - added support for the SERIAL datatype, which is a not null INTEGER that auto-increments, and the ability to specify a column as NOT NULL.
  • UDF - new API objects added to teiid-api to support user defined functions that are capable of pushdown to source.
  • Unescape Function - a new system function, unescape, was added to handle common \ escaping in strings including octal, hex/unicode, \b, \r, \n, \f, and \t.
  • Predicate Optimization - expanded optimizations for detecting always false conditions when using IS NULL, IN, or comparison predicates with literal values.
  • Partition-wise Optimizations - Views defined by partitioned unions (union alls where each branch has a projected literal or an IN predicate that makes its values mutually exclusive from the other branches) can be used in aggregation or joins and the optimizer will take advantage of the partitioning information. For example, when a partitioned union is joined against another partitioned union, the optimizer will reorganize the join of unions into a union of joins.
  • Delegate Translator - A new translator base class was added that is capable of delegating all the calls to another configured translator.
  • JDBC Reauthentication - Teiid connections (defined by the org.teiid.jdbc.TeiidConnection interface) now support the changeUser method to reauthenticate a given connection.
  • Lob Caching - Lobs are allowed to cache to disk as part of ResultSet caching. Distributed lob caching is not allowed.

There were numerous issues addressed as well. See the release notes for more details. Download today, give it try, and vote for or log features you want in upcoming releases.

The Teiid Team

Note: the upcoming Teiid Designer 7.3 will be required to use the updatable view enhancements.

Wednesday, January 19, 2011

Teiid 7.3 CR1 Released

7.3 CR1 is now available for download. From last release of 7.3 Beta1, support for auto-increment IDs for temp tables is added. Also couple caching issues has been resolved when the JBoss AS being run in the "all" profile. When using H2 as the source "boolean" data type was being imported incorrectly, that has been fixed along with few other issues. For more information check out the JIRA issues here.

If you have been putting off 7.3 version so far and working with 7.2-Final, this is time for you to check your usecase with 7.3 version and report any regressions that we might have missed, so that we can fix them before the 7.3 Final is released.

Thank you.

Teiid Team

Tuesday, January 11, 2011

Teiid 7.3 Beta 1

7.3 Beta 1 refines the delegating translator, changes the default user credentials to user/user, and provides even more Salesforce fixes. See the release notes and updated guides for more. Expect a candidate release soon, so now is great time to validate your fixes and features.

The Teiid Team