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Allow more MySQL and PostgreSQL keywords as unquoted identifiers #1377

Job	Run time
Grammar Choice Conflicts	37s
Gradle Check (ubuntu-latest)	3m 42s
Gradle Check (macos-latest)	4m 55s
Gradle Check (windows-latest)	4m 21s
Maven Verify (windows-latest)	4m 6s
Maven Verify (macos-latest)	6m 47s
Maven Verify (ubuntu-latest)	2m 44s
Build & Deploy Sphinx Docs	-1s
Gradle Publish (Maven Central)	-1s
	27m 10s