[2021-07-07T07:32:52.428Z] cast(greatest(a, b, c, d, e, f, g) as DECIMAL(65,20))

[2021-07-07T07:32:52.428Z] 18704.00000000000000000000

[2021-07-07T07:32:52.428Z] 455145037341130752.00000000000000000000

[2021-07-07T07:32:52.428Z] 47.00000000000000000000

[2021-07-07T07:32:52.428Z] NULL

[2021-07-07T07:32:52.428Z] 66.00000000000000000000

[2021-07-07T07:32:52.428Z] 24498.00000000000000000000

[2021-07-07T07:32:52.428Z] NULL

[2021-07-07T07:32:52.428Z] NULL

[2021-07-07T07:32:52.428Z] NULL

[2021-07-07T07:32:52.428Z] NULL

[2021-07-07T07:32:52.428Z] SELECT cast(greate

[2021-07-07T07:32:52.428Z] but got(584):

[2021-07-07T07:32:52.428Z] SELECT cast(greatest(a, b, c, d, e, f, g) as DECIMAL(65,20)) FROM (SELECT `col_decimal_40_20_unsigned_key` AS a, `col_decimal_10_4_unsigned` AS b, `col_bigint_signed_key` AS c, `col_bigint_unsigned_key` AS d, `col_decimal_10_4_signed_key` AS e, `col_decimal_10_4_signed` AS f, `col_decimal_6_3_signed_key` AS g FROM `table10_int_autoinc` ) tmp;

[2021-07-07T07:32:52.428Z] cast(greatest(a, b, c, d, e, f, g) as DECIMAL(65,20))

[2021-07-07T07:32:52.428Z] 18704.00000000000000000000

[2021-07-07T07:32:52.428Z] 455145037341130752.00000000000000000000

[2021-07-07T07:32:52.428Z] 47.00000000000000000000

[2021-07-07T07:32:52.428Z] NULL

[2021-07-07T07:32:52.429Z] 66000000000000000000.00000000000000000000

[2021-07-07T07:32:52.429Z] 24498.00000000000000000000

[2021-07-07T07:32:52.429Z] NULL

[2021-07-07T07:32:52.429Z] NULL

[2021-07-07T07:32:52.429Z] NULL

[2021-07-07T07:32:52.429Z] NULL

[2021-07-07T07:32:52.429Z]