Wrong value of the new field at the old records, created before that new field
was added.
-----------------------------------------------------------------------------------------
Key: CORE-5507
URL: http://tracker.firebirdsql.org/browse/CORE-5507
Project: Firebird Core
Issue Type: Bug
Components: Engine
Affects Versions: 3.0.2
Reporter: Vlad Khorsun
RECREATE TABLE T (ID INT NOT NULL, DESCR VARCHAR(32) NOT NULL);
COMMIT;
INSERT INTO T (ID, DESCR) VALUES (1, 'No F1 field');
COMMIT;
ALTER TABLE T ADD F1 VARCHAR(16) DEFAULT 'XYZ' NOT NULL;
COMMIT;
INSERT INTO T (ID, DESCR) VALUES (2, 'F1 field, default XYZ');
COMMIT;
SELECT * FROM T;
COMMIT;
ALTER TABLE T ALTER COLUMN F1 SET DEFAULT 'ABC';
COMMIT;
INSERT INTO T (ID, DESCR) VALUES (3, 'F1 field, default ABC');
COMMIT;
SELECT * FROM T;
COMMIT;
After the first select all is as expected:
ID DESCR F1
============ ================================ ================
1 No F1 field XYZ
2 F1 field, default XYZ XYZ
after the second select
expected
ID DESCR F1
============ ================================ ================
1 No F1 field ABC
2 F1 field, default XYZ XYZ
3 F1 field, default ABC ABC
actual
ID DESCR F1
============ ================================ ================
1 No F1 field XYZ
2 F1 field, default XYZ XYZ
3 F1 field, default ABC ABC
Note value of the field F1 at the first record: it is expected that is should
be the same as latest DEFAULT value.
Also note that 2nd and 3rd INSERTs assigns correct value to the omitted field -
same as latest DEFAULT value.
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