Data.DBXCommon.TDBXIsolations

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Delphi

TDBXIsolations       = class

C++

class PASCALIMPLEMENTATION TDBXIsolations : public System::TObject

Properties

Type	Visibility	Source	Unit	Parent
class	public	Data.DBXCommon.pas Data.DBXCommon.hpp	Data.DBXCommon	Data.DBXCommon

Description

Isolation levels supported by TDBXTransaction.

Isolation levels supported by the TDBXTransaction class. The isolation level indicates how much transactions can interact with each other.

This table shows isolation levels constants.

Constant	Description
ReadCommitted	Current transaction sees only changes that have been committed, but can receive an inconsistent view of the data if additional changes are committed before the transaction ends.
RepeatableRead	Current transaction is guaranteed a consistent view of the data, which includes only changes committed by other transactions at the start of the transaction.
DirtyRead	Current transaction sees all changes made by other transactions, even if they have not yet been committed. This option is not available for the Oracle driver.
Serializable	Available since dbExpress 4. Current transaction sees no changes made by other transactions including phantoms.
SnapShot	Available since dbExpress 4. Read only transaction that provides a transactionally consistent snapshot of the database.

See Also

• TDBXTransaction