How to use Booleans with Delphi XE2 dbExpress and Firebird 2.5

Question

使用布尔字段时，新的XE2 dbExpress是否仍有问题？

Answer 1

The best way is to use a domain

CREATE DOMAIN BOOL AS
SMALLINT
DEFAULT 0
CHECK (value in (0,1) or value is null);

Regards

Answer 2

AFAIK Firebird没有BOOLEAN类型。

Answer 3

Create a Char(1) field. Set values "Y" or "N"

http://www.firebirdfaq.org/faq12/