Table returns PCollectionView in BeamSQL #19667
Description
We might be able to define a table with properties that says this table return a PCollectionView. By doing so we will have a trigger based PCollectionView available in SQL rel nodes.
Relevant thread: https://lists.apache.org/thread.html/602121ee49886590ce4975f66aa0d270b4a5d64575337fca8bef1232@%3Cdev.beam.apache.org%3E
Imported from Jira BEAM-7758. Original Jira may contain additional context.
Reported by: amaliujia.