Stored Query from Database as JDBC input to Logstash

    input {
      jdbc {
        jdbc_driver_library => "mysql-connector-java-5.1.36-bin.jar"
        jdbc_driver_class => "com.mysql.jdbc.Driver"
        jdbc_connection_string => "jdbc:mysql://localhost:3306/MYDB"
        //MYDB will be set dynamically. 
        jdbc_user => "mysql"
          schedule => "* * * * *"
        statement => "SELECT  config.query as query from QueryConfigTable config  "

/// output as elasticSearch 
     elasticsearch {

        hosts => [""]
        index => "test"

final output is 

    "_index": "test",
    "_type": "doc",
    "_source": {
    "@version": "1",
    "query": "select * from customertable cust  where cust.isdeleted !=0"

but i want the query value ie, "select * from customertable cust where cust.isdeleted !=0 "to be executed as JDBC input to logstash

So you have a table that has a column that contains another query that you want to execute?
Might be a better idea to create a stored procedure instead that then puts the queries from the table in a cursor and executes it then, or just put your desired query in the logstash config.

Thank you @AquaX
Yes correct
And I hope Stored Procedure is correct to go further