I am new on elk stack. I am using postgresql and the thing that i am trying to do it: i have a table called testtable with two columns key and value; whenever i add something in to these columns in my database i want it to be seen from logstash, i have a .conf file and inside of it i put a line:
statement => "select * from testtable"
It is working to pick the table but when i just want to insert just one value it will always take again and again all the database table. So is there a way for logstash to take just once the all table and then whenever i insert just the inserted ones?
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