Submitted by: @asfernandes

Philippe wrote in fb-devel:

we get a fail in one test (functional.arno.optimizer.opt_aggregate_distribution_14)

here the initialization :
CREATE TABLE Colors (
ColorID INTEGER NOT NULL,
ColorName VARCHAR(20)
);

CREATE TABLE Flowers (
FlowerID INTEGER NOT NULL,
FlowerName VARCHAR(30),
ColorID INTEGER
);

COMMIT;

/* Value 0 represents -no value- */
INSERT INTO Colors (ColorID, ColorName) VALUES (0, 'Not defined');
INSERT INTO Colors (ColorID, ColorName) VALUES (1, 'Red');
INSERT INTO Colors (ColorID, ColorName) VALUES (2, 'White');
INSERT INTO Colors (ColorID, ColorName) VALUES (3, 'Blue');
INSERT INTO Colors (ColorID, ColorName) VALUES (4, 'Yellow');
INSERT INTO Colors (ColorID, ColorName) VALUES (5, 'Black');
INSERT INTO Colors (ColorID, ColorName) VALUES (6, 'Purple');

/* insert some data with references */
INSERT INTO Flowers (FlowerID, FlowerName, ColorID) VALUES (1, 'Red Rose', 1);
INSERT INTO Flowers (FlowerID, FlowerName, ColorID) VALUES (2, 'White Rose', 2);
INSERT INTO Flowers (FlowerID, FlowerName, ColorID) VALUES (3, 'Blue Rose', 3);
INSERT INTO Flowers (FlowerID, FlowerName, ColorID) VALUES (4, 'Yellow Rose', 4);
INSERT INTO Flowers (FlowerID, FlowerName, ColorID) VALUES (5, 'Black Rose', 5);
INSERT INTO Flowers (FlowerID, FlowerName, ColorID) VALUES (6, 'Red Tulip', 1);
INSERT INTO Flowers (FlowerID, FlowerName, ColorID) VALUES (7, 'White Tulip', 2);
INSERT INTO Flowers (FlowerID, FlowerName, ColorID) VALUES (8, 'Yellow Tulip', 4);
INSERT INTO Flowers (FlowerID, FlowerName, ColorID) VALUES (9, 'Blue Gerbera', 3);
INSERT INTO Flowers (FlowerID, FlowerName, ColorID) VALUES (10, 'Purple Gerbera', 6);

COMMIT;

/* Normally these indexes are created by the primary/foreign keys,
but we don't want to rely on them for this test */
CREATE UNIQUE ASC INDEX PK_Colors ON Colors (ColorID);
CREATE UNIQUE ASC INDEX PK_Flowers ON Flowers (FlowerID);
CREATE ASC INDEX FK_Flowers_Colors ON Flowers (ColorID);
CREATE ASC INDEX I_Colors_ColorName ON Colors (ColorName);

COMMIT;

and the test :

SET PLAN ON;
SELECT
f.ColorID,
c.ColorName,
Count(*)
FROM
Colors c
LEFT JOIN Flowers f ON (f.ColorID = c.ColorID)
GROUP BY
f.ColorID, c.ColorName
HAVING
c.ColorName LIKE 'B%';

Before 2.5Beta1 we get :

PLAN SORT (JOIN (C INDEX (I_COLORS_COLORNAME), F INDEX (FK_FLOWERS_COLORS)))
COLORID COLORNAME COUNT
============ ==================== ============
3 Blue 2
5 Black 1

with 2.5.0Beta1 :

PLAN SORT (JOIN (C NATURAL, F INDEX (FK_FLOWERS_COLORS)))
COLORID COLORNAME COUNT
============ ==================== ============
3 Blue 2
5 Black 1

Commits: 4a4fd4c

====== Test Details ======

See: fbt-repo\tests\functional\arno\optimizer\opt_aggregate_distribution_14.fbt