Maria DB/MySQL difference on comparing TimeStamp - mysql

Question

I have two different development environment which is MySQL 5.6 & Maria DB 10.0
I use WHERE query like time>="userInputBeginTime" to limit the minimum date of data.
Unfortunately, the front-side provide wrong date information(in my case, the expected input is date string formatted like "yyyy-MM-dd", but the real input was "Invalid Date" which due to javascript error)
And then i found a difference between MySQL & Maria DB
In MySQL:
SELECT NOW() > "Invalid Date" test;
+-----------+
| test |
+-----------+
| 0 |
+-----------+
In Maria DB:
SELECT NOW() > "Invalid Date" test;
+-----------+
| test |
+-----------+
| 1 |
+-----------+
This difference leads directly to the different result that MySQL returned nothing and Maria DB returned everything.
I think may be they use different methods to compare
My temporary solution is using SQL like this
SELECT * FROM table_name
WHERE
NOT ISNULL(CONVERT("userInputBeginTime",datetime))
AND time >= "userInputBeginTime"
to force Maria DB return nothing when invalid input was detected.
I would like to know if there is a better solution?
Best Regards

Answer 1

You can try using STR_TO_DATE to parse the string as a date in the format you expect. This function would return NULL if it cannot parse the date in the format specified. Your bad JavaScript input would fall into this category and should produce NULL:
SELECT *
FROM table_name
WHERE STR_TO_DATE(userInput, '%Y-%m-%d') IS NOT NULL AND
<other conditions here>
STR_TO_DATE in MariaDB
STR_TO_DATE in MySQL