Kx kdb+ - Deferred Sync Query
The Deferred Sync Query feature allows the Kx kdb+ connector to support synchronous and asynchronous reads. The advantage of using this option is that there is no queue on the Kx kdb+ server side, queries are farmed out to slaves and returned to asynchronous instead.
Checking the Deferred Sync Query box would enable the query box:
The {Query} parameter is used as a place holder for the target query that is defined in the Query builder.