I've noticed this in the past but for reason didn't notice I should report it until I downloaded the Emacs 27 Alpha recently and had to fix it again.
(ms
:name "Microsoft"
:font-lock sql-mode-ms-font-lock-keywords
:sqli-program sql-ms-program
:sqli-options sql-ms-options
:sqli-login sql-ms-login-params
:sqli-comint-func sql-comint-ms
:prompt-regexp "^[0-9]*>"
;; below the new line
:prompt-cont-regexp "^[0-9]*>"
;; above the new line
:prompt-length 5
:syntax-alist ((?@ . "_"))
:terminator ("^go" . "go"))