private bool ForeignKeyConstraintPredicate(IMetadataConstraints constraints, IMetadataConstraints otherConstraints, RelationConstraint c)
{
return(ConstraintPredicate(otherConstraints, c, RelationConstraintType.FOREIGN_KEY,
otherConstraint =>
!otherConstraints.RelationConstraintsByName.Values.Contains(c) ||
!otherConstraints.ReferenceConstraintsByName.Values.Contains(constraints.ReferenceConstraintsByName[c.ConstraintName])));
}
private bool ConstraintPredicate(
IMetadataConstraints otherConstraints,
RelationConstraint c,
RelationConstraintType relationConstraintType,
Func <RelationConstraint, bool> predicate)
{
if (c.RelationConstraintType != relationConstraintType)
{
return(false);
}
if (!FilterSystemFlagUserPredicate(c.Relation))
{
return(false);
}
if (relationConstraintType != RelationConstraintType.FOREIGN_KEY && !Metadata.MetadataRelations.Relations.ContainsKey(c.RelationName))
{
return(false);
}
var otherConstraint = otherConstraints.RelationConstraintsByName.Values.FirstOrDefault(x => x == c);
if (otherConstraint != null)
{
return(predicate == null
? otherConstraint != c
: otherConstraint != c || predicate(otherConstraint));
}
return(true);
}
private static IEnumerable <RelationConstraint> FilterCheckRelationConstraintsConstraints(IMetadataConstraints metadataConstraints)
{
return(metadataConstraints.RelationConstraintsByName.Values
.Where(x => x.RelationConstraintType == RelationConstraintType.CHECK));
}
private bool UniqueConstraintPredicate(IMetadataConstraints constraints, IMetadataConstraints otherConstraints, RelationConstraint c)
{
return(ConstraintPredicate(otherConstraints, c, RelationConstraintType.UNIQUE, null));
}
private bool PrimaryKeyConstraintPredicate(IMetadataConstraints constraints, IMetadataConstraints otherConstraints, RelationConstraint c)
{
return(ConstraintPredicate(otherConstraints, c, RelationConstraintType.PRIMARY_KEY, null));
}
