ERROR: operator does not exist: timestamp without time zone > integer)

Question

I am using Rails 5.2 and passing a date parameter. To simplify my example, look at the below sql query, it is similar but simplified as it is too complex to be used with active record methods, so I need to run the raw sql..

sql = 'Select * FROM mytable WHERE created_at > #{@start_date_time}'

1) How do I sanitize the parameters as I pass them into a string or the execute command.

2) What format should my date be in? I tried '2018-01-01 00:00:00.000' and '2018-01-01' and both error.

CODE:

sql =count_query(@start_date_time, sender_type, sender_id)
records_array = ActiveRecord::Base.connection.execute(sql)

ERROR

ActiveRecord::StatementInvalid (PG::UndefinedFunction: 
ERROR:  operator does not exist: timestamp without time zone > integer)

LINE 11: WHERE created_at > 2018-01-01

Answer 1

WHERE created_at > '2018-01-01' 应该可以工作