Question

Through an API, I am getting following JSON response,

status: "550",
created: "2012-07-02 19:00:58",
reason: "550 #5.1.0 Address rejected. ",
email: "[e-mail]"

I want this response to be saved in to database,

each time database is populated, I need “Created” field, which is infact a timestamp, to be unique, The script I am going to write is basically a cron job, so I dont want to add same record many times in database,

How I can I populate database, based on timestamp?

also, how can I extract bounce code extracted from

reason: "550 #5.1.0 Address rejected. ",

here the bounce code is

5.1.0

guide me please,

Answer 1

1 – Avoid duplicate entries

Make the column unique – Add a UNIQUE index to the timestamp column, so that the database server complains if you are trying to insert the same one again.

CREATE UNIQUE INDEX name_of_index ON tablename (created);

After this you can INSERT IGNORE INTO or REPLACE INTO the table and it will fail or update the existing row.

Check if the value exists – You could just execute a query before inserting anything, checking if the timestamp exists.

SELECT count(created) FROM tablename WHERE created = '2012-07-02 19:00:58';

If the results is > 0 you know that you already have a row with that timestamp so you do not insert. This is safe if noone else puts anything in that DB between your query and insert statement.

Always delete and insert – A third way is to prophylactically delete all rows with that timestamp and insert a row afterwards.

DELETE FROM tablename WHERE created = '2012-07-02 19:00:58';

INSERT INTO tablename [...];

But as I do not really get what you are trying to do here, you would need to edit your question and be more concrete.

2 – extract bounce code

Depends on what those reasons can look like. You could get to the code by extracting the string between # and the first following space if it is safe to assume that there is no other #. No need for regular expressions here. Or simply refer to André Catita’s answer.