liquibase.precondition.core
Classes 
AndPrecondition
ChangeLogPropertyDefinedPrecondition
ChangeSetExecutedPrecondition
ColumnExistsPrecondition
DBMSPrecondition
ErrorPrecondition
FailedPrecondition
ForeignKeyExistsPrecondition
IndexExistsPrecondition
NotPrecondition
OrPrecondition
PreconditionContainer
PrimaryKeyExistsPrecondition
RunningAsPrecondition
SequenceExistsPrecondition
SqlPrecondition
TableExistsPrecondition
ViewExistsPrecondition
Enums 
PreconditionContainer.ErrorOption
PreconditionContainer.FailOption
PreconditionContainer.OnSqlOutputOption