KSQL UNIX_TIMESTAMP function is not dinamic on streams created with queries

Question

I'm creating the following stream:

CREATE STREAM riderLocations (profileId VARCHAR, latitude DOUBLE, longitude DOUBLE, publishtime VARCHAR) 
WITH (kafka_topic='locations', value_format='json', partitions=1);

and then this other one:

CREATE STREAM INVENTORY WITH (KAFKA_TOPIC='locations_in') 
AS select * FROM riderLocations 
where STRINGTOTIMESTAMP(publishtime, 'yyyy-MM-dd HH:mm:ss.SSSZ') < UNIX_TIMESTAMP();

when I execute the command: select * from inventory emit changes;

it only presents the messages that had a publish date smaller than the moment when the inventory stream was created.

How can I force the unix_timestamp value to update and update my stream inventory?

Answer 1

The timestamp is evaluated at query creation time, not runtime.

If you actively want messages less than "now", you'll need to include that as a WHERE clause for each SELECT query you run