1.47 Sun Mar 4 03:30:00 UTC 2007
* Do the search in unions only when we must do them, not on every
call to the Next method
* Don't index ex/ dir to avoid complains by the indexer of PAUSE/CPAN
1.46 Sun Feb 25 19:04:00 UTC 2007
* when doing a union, we need to actually search, rather than just
doing a count
* add support for testing with Oracle backend
* Use CROSS JOIN instead of ',' as SQL parsers in Pg and some mysql
are buggy and cannot parse "FROM X, Y JOIN Z ON Z.f = X.f"
* deprecate DEBUG method, it's still there but produce warning
* fix CleanSlate method that was missing several keys
* fix a long standing bug we had, we didn't write depends_on data about
a join, so we could build queries with incorrect parens around join
conditions
* fix default values for ALIAS1 argument in the Join method, istead of
defaulting FIELD1 to 'main' value
* fix a TODO test
* internal refactoring of a storage for query's conditions,
instead of building query strings right after the limit
or join, we now build a perl structure
* don't clone attributes that don't exists in the Clone method
* we use Encode module without perl version check for a long time, so
we can get rid of all checks for the version and load the module
at compile time everywhere we need it
* implement MayBeNull method in the handler that checks if applied
conditions allow NULLs in the result set
* implement cascaded LEFT JOINs optimization
* additional tests for CleanSlate and Clone methods, ENTRY_AGGREGATOR
argument, different types of joins and LEFT JOIN optimizer
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