2) Applied the same approach to temporary GC records.
3) Refactored the Record class to avoid reallocations, to improve encapsulation and to simplify the code.
4) Slightly refactored UndoItem to isolate its logic from the Record class.
5) Reduced the in-memory size of the undo log.
6) Slightly better alternative to the legacy NULL reporting for outer joins.
7) Minor fixes and adjustments in BufferedStream.
2) Reworked the lock manager synchronization: added the RAII mutex holders and avoided dirty reads for the shared memory.
3) Encapsulated lck_length into the Lock class + small related refactoring.
4) Front ported recent fixes from the v2.x branches.
5) Misc cleanup.
CORE-3502 : DROP VIEW ignores the existing non-column dependencies, and
CORE-3503 : ALTER VIEW crashes the server if the new version has an artificial (aggregate or union) stream at the position of a regular context in the older version.
// Name REL_view is already used in DSQL so i introduced ugly REL_jrd_view flag
Store ValueExprNodes instead of jrd_nod in the metadata cache.
Make RecordSourceNode child of ExprNode as they share most operations.
Get rid of the JRD visitors in favor of direct calls.
Convert assignments statement lists created inside expressions to separate source and targets ValuesExprNodes.
2) Created ExprNode::expressionEqual method to replace a new big and ugly switch.
3) Make boolean referencers use BoolExprNode instead of jrd_nod, except nod_validate for now. This includes BinaryBoolNode and NotBoolNode working without jrd_nod references.
4) Rework in the impure allocation code (replace "csb_impure += ..." by CMP_impure calls).