CAST(ROUND(magicInWideDecimal) AS SIGNED) returns NULL

DROP TABLE IF EXISTS t1;

CREATE TABLE t1 (a DECIMAL(30,1)) ENGINE=ColumnStore;

INSERT INTO t1 VALUES (-9223372036854775807.9);

SELECT a, ROUND(a), CAST(ROUND(a) AS SIGNED) FROM t1;

+------------------------+----------------------+--------------------------+

| a                      | ROUND(a)             | CAST(ROUND(a) AS SIGNED) |

+------------------------+----------------------+--------------------------+

| -9223372036854775807.9 | -9223372036854775808 |                     NULL |

+------------------------+----------------------+--------------------------+