Need aws_oracle_ext.systimestamp function defination for postgres

Hi all,

I am working on a migration from Oracle to PostgreSQL using the AWS SCT.

I had converted 823 table out of 866 tables to postgres. However for few
tables I am facing challenges in convertion due to
"aws_oracle_ext.systimestamp" fuctions.

below is the Error for your reference.

ERROR: function aws_oracle_ext.systimestamp() does not exist
Hint: No function matches the given name and argument types. You might need
to add explicit type casts.

I am searching for the fucntion defination for the
aws_oracle_ext.systimestamp.

Similar to the below "aws_oracle_ext.sysdate".

CREATE OR REPLACE FUNCTION aws_oracle_ext.sysdate() RETURNS timestamp
without time zone AS $BODY$ DECLARE l_var1 interval ; BEGIN l_var1 := ’0
hour’; /* Please type your value instead of 0 */ return
(clock_timestamp()::TIMESTAMP(0) WITHOUT TIME ZONE) + l_var1; END; $BODY$
LANGUAGE plpgsql VOLATILE;

Thank you in advance.