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Clarify PostgreSQL DO support and verify the reported block (#2633) #860

Job	Run time
Gradle Check (ubuntu-latest)	2m 46s
Grammar Choice Conflicts	39s
Gradle Check (windows-latest)	3m 49s
Gradle Check (macos-latest)	2m 42s
Maven Verify (ubuntu-latest)	2m 58s
Maven Verify (windows-latest)	3m 50s
Maven Verify (macos-latest)	2m 53s
Build & Deploy Sphinx Docs	2m 41s
Gradle Publish (Maven Central)	4m 20s
	26m 38s