Hi, I want to support "unbounded limit" in Beam SQL shell (jira: https://issues.apache.org/jira/browse/BEAM-4194).
Unbound limit means running limit query on unbounded input data (e.g. Apache Kafka, Cloud Pub/Sub). One example query is "SELECT col_name FROM unbounded_table LIMIT 1". This is useful in SQL Shell as users would be able to sample data from unbounded input data. Here is a google doc about my proposal, please take a look and comment: https://docs.google.com/document/d/13zeTewHH9nfwhSlcE4x77WQwr1U2Z4sTiNRjOXUj2aw/edit?usp=sharing Thanks, Rui
