ValidateTable validates that a table descriptor can be watched by a CHANGEFEED.

WarningsForTable returns any known nonfatal issues with running a changefeed on this kind of table.

AlterOptionValidations do a basic check on the options in an ALTER CHANGEFEED.

AlterTargetOptionValidations do a basic check on the target-level options in an ALTER CHANGEFEED.

CreateOptionValidations do a basic check on the WITH options in a CREATE CHANGEFEED.