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Accept named FOREIGN KEY and CHECK drops without a dialect #1232

Job	Run time
Gradle Check (ubuntu-latest)	3m 56s
Grammar Choice Conflicts	29s
Gradle Check (macos-latest)	4m 0s
Gradle Check (windows-latest)	5m 2s
Maven Verify (ubuntu-latest)	4m 6s
Maven Verify (windows-latest)	2m 56s
Maven Verify (macos-latest)	5m 41s
Gradle Publish (Maven Central)	-1s
Build & Deploy Sphinx Docs	-1s
	26m 8s