Logstash+jdbc data synchronization +head display problems

Have a problem

• head UI Show only one piece of data , The index cannot be filtered
  - reason ： document_id => “%{user_id}” in user_id The reference tutorial has not been changed
  - solve ： According to its own primary key, it is changed into an object %{ The primary key of your own table }
  - follow-up ： What if multiple tables are synchronized ？
• When the synchronization sql_last_value Has always been a 0, see logstash_jdbc_last_run And indeed 0
  - reason ： use_column_value=> false Is the default value , The reference tutorial is set to true
  - solve ： shielding use_column_value=> true
• Example synchronization file ：

input{
         jdbc {
            # jdbc_driver_library => "mysql-connector-java-5.1.44-bin.jar"
    	#  drive 
             jdbc_driver_library => "/usr/local/soft/logstash-input-jdbc-master/lib/mysqljdbc-5.1.18.jar"
             jdbc_driver_class => "com.mysql.jdbc.Driver"
             jdbc_connection_string => "jdbc:mysql://172.16.0.178:3308/mtp_dev"
             jdbc_user => "mtp_dev"
             jdbc_password => "mtp_dev"
             jdbc_paging_enabled => "true"
             jdbc_page_size => "1000"
             jdbc_default_timezone =>"Asia/Shanghai"
             schedule => "* * * * *"
             statement => "SELECT * FROM user_sys_user where latest_time > :sql_last_value"
    	# record_last_run => true
            # use_column_value=> false
             tracking_column => "latest_time"
             last_run_metadata_path => "./logstash_jdbc_last_run"
             clean_run => "false"
           } 
    } 
    output{
          elasticsearch {
             hosts => "172.16.0.94:9200"
             user => "elastic"
             password => "changme"
             index => "sys_user"
             document_id => "%{user_id}"
          }
          stdout {
             codec => json_lines
         }
     }