public UniqueIndex AddUniqueIndex(ITable table, IColumn[] columns)
{
var index = new UniqueIndex(table, columns);
AddIndex(index);
return(index);
}
public UniqueIndex AddUniqueIndex(ITable table, Field[] fields)
{
var index = new UniqueIndex(table, Index.GetColumnsFromFields(fields));
AddIndex(index);
return(index);
}
public virtual UniqueIndex GenerateUniqueIndex(ITable table, UniqueIndexAttribute attribute)
{
if (attribute == null)
{
return(null);
}
var result = new UniqueIndex(table, Index.GetColumnsFromFields(this))
{
AvoidAttachToUniqueIndexes = attribute.AvoidAttachToUniqueIndexes
};
if (attribute.AllowMultipleNulls)
{
result.Where = IndexWhereExpressionVisitor.IsNull(this, false);
}
return(result);
}
public virtual IEnumerable<Index> GeneratIndexes(ITable table)
{
switch (IndexType)
{
case IndexType.None: return Enumerable.Empty<Index>();
case IndexType.Unique: return new[] { new UniqueIndex(table, Index.GetColumnsFromFields(this)) };
case IndexType.UniqueMultipleNulls:
var index = new UniqueIndex(table, Index.GetColumnsFromFields(this));
index.Where = IndexWhereExpressionVisitor.IsNull(this, false);
return new[] { index };
}
throw new InvalidOperationException("IndexType {0} not expected".Formato(IndexType));
}
public virtual UniqueIndex GenerateUniqueIndex(ITable table, UniqueIndexAttribute attribute)
{
if (attribute == null)
return null;
var result = new UniqueIndex(table, Index.GetColumnsFromFields(this))
{
AvoidAttachToUniqueIndexes = attribute.AvoidAttachToUniqueIndexes
};
if(attribute.AllowMultipleNulls)
result.Where = IndexWhereExpressionVisitor.IsNull(this, false);
return result;
}
public static SqlPreCommand DropIndex(UniqueIndex ix)
{
if (ix.ViewName == null)
return DropIndex(ix.Table.Name, ix.IndexName);
else
return DropViewIndex(new ObjectName(ix.Table.Name.Schema, ix.ViewName), ix.IndexName);
}
