CREATE TABLE my_table1
(
    id BigSerial NOT NULL,
    LENGTH UInt32,
    ama Utf8,
    ama1 DECIMAL(22,9),
    ama2 DyNumber,
    PRIMARY KEY (id)
);

$ama = "123456789012345678901234567890"; -- 30
INSERT INTO my_table1  (LENGTH, ama, ama1, ama2) VALUES (Unwrap(len($ama)), $ama, DECIMAL($ama, 22, 9), DyNumber($ama));

$ama = "1234567890123456789012345"; -- 25
INSERT INTO my_table1  (LENGTH, ama, ama1, ama2) VALUES (Unwrap(len($ama)), $ama, DECIMAL($ama, 22, 9), DyNumber($ama));

$ama = "123456789012345"; -- 15
INSERT INTO my_table1  (LENGTH, ama, ama1, ama2) VALUES (Unwrap(len($ama)), $ama, DECIMAL($ama, 22, 9), DyNumber($ama));

$ama = "12345678901234"; -- 14
INSERT INTO my_table1  (LENGTH, ama, ama1, ama2) VALUES (Unwrap(len($ama)), $ama, DECIMAL($ama, 22, 9), DyNumber($ama));

$ama = "1234567890123"; -- 13
INSERT INTO my_table1  (LENGTH, ama, ama1, ama2) VALUES (Unwrap(len($ama)), $ama, DECIMAL($ama, 22, 9), DyNumber($ama));

$ama = "1234567890"; -- 10
INSERT INTO my_table1  (LENGTH, ama, ama1, ama2) VALUES (Unwrap(len($ama)), $ama, DECIMAL($ama, 22, 9), DyNumber($ama));

-- Результат inf:
SELECT
SUM(ama1) AS s2,
--sum(ama2) as s3 -- Unsupported column type: DyNumber
FROM my_table1;

-- Результат число:
SELECT
SUM(ama1) AS s2,
--sum(ama2) as s3
FROM my_table1 WHERE LENGTH < 14;