* Priorly deprecated parameters CompleteBooleanEvaluation, OldColumnNaming and
OldSetClauseSemantics of firebird.conf are not supported anymore and have been removed.
* Parameters UsePriorityScheduler, PrioritySwitchDelay, PriorityBoost, LegacyHash,
LockGrantOrder of firebird.conf have no use anymore and therefore were removed.
* A number of new reserved keywords are introduced. The full list is available
here: /doc/sql.extentions/README.keywords. Please ensure your DSQL
statements and procedure/trigger sources don't contain those keywords as
identifiers. Otherwise, you'll need to either use them quoted (in Dialect 3
only) or rename them.
* Improperly mixed explicit and implicit joins are not supported anymore, as per
the SQL specification. It also means that in the explicit A JOIN B ON <condition>,
the condition is not allowed to reference any stream except A and B.
See ticket CORE-2812 in the Firebird tracker for more details.