Does ekuiper function support generate timestamp or convert format_time_string to timestamp

[silenceli]

I have searched doc https://ekuiper.org/docs/zh/latest/sqls/functions/datetime_functions.html。I couldn't find any built-in functions in EKuiper for generating timestamps or converting time strings to timestamps. I would like to inquire if such functions exist, and if not, how should I proceed?

[ngjaying]

https://ekuiper.org/docs/en/latest/sqls/functions/other_functions.html#tstamp