Reset trickle loading to rebuild webhook subscriptions

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This article provides steps to rebuild trickle loading, re-enabling any webhooks that the cloud platform might have dropped.

Instructions

Perform the following steps:

  • Log on to your Data Replicator environment using Query Tool or Data Hub.
  • Perform the Invantive PSQL statement below:
begin
  for r_sql
  in
  ( select '1-' || tbe.tbe_full_qualified_name sorting_order
    ,      'alter persistent cache set table ' 
           || tbe.tbe_full_qualified_name 
           || ' approach copy' 
           sql_stmt
    from   dc_tables@datacache tbe
    join   SYSTEMTABLES@DataDictionary ste
    on     ste.full_qualified_name = tbe.tbe_full_qualified_name
    and    ste.webhook_topic is not null
    union all
    select '2-' || tbe.tbe_full_qualified_name
    ,      'alter persistent cache set table ' 
           || tbe.tbe_full_qualified_name 
           || ' approach trickle' 
           sql_stmt
    from   dc_tables@datacache tbe
    join   SYSTEMTABLES@DataDictionary ste
    on     ste.full_qualified_name = tbe.tbe_full_qualified_name
    and    ste.webhook_topic is not null
    order
    by     sorting_order
  )
  loop
    execute immediate r_sql.sql_stmt;
  end loop;
end;
  • First, all existing webhook subscriptions will be removed for the tables replicated.
  • In the next step, the webhook subscriptions are registered again for the replicated tables.
  • All tables will have trickle loading as requested replication approach.
  • However, trickle loading will only be actually used once a first message is received. This ensures data integrity of your replace and is intended behavior.
  • Together with a consultant you might want to overrule this behavior.