public override IEnumerable <IAnnotation> For(IIndex index)
{
var indexAnnotations = base.For(index);
var nullFilteredIndexAnnotation = index.FindAnnotation(SpannerAnnotationNames.IsNullFilteredIndex);
if (nullFilteredIndexAnnotation != null)
{
indexAnnotations = indexAnnotations.Concat(new[] { nullFilteredIndexAnnotation });
}
var storingIndexAnnotation = index.FindAnnotation(SpannerAnnotationNames.Storing);
if (storingIndexAnnotation != null)
{
indexAnnotations = indexAnnotations.Concat(new[] { storingIndexAnnotation });
}
return(indexAnnotations);
}
/// <summary>
/// Returns a value indicating whether the index is clustered.
/// </summary>
/// <param name="index"> The index. </param>
/// <param name="storeObject"> The identifier of the store object. </param>
/// <returns> <see langword="true" /> if the index is clustered. </returns>
public static bool?IsClustered([NotNull] this IIndex index, StoreObjectIdentifier storeObject)
{
var annotation = index.FindAnnotation(SqlServerAnnotationNames.Clustered);
if (annotation != null)
{
return((bool?)annotation.Value);
}
return(GetDefaultIsClustered(index, storeObject));
}
/// <summary>
/// Returns the index filter expression.
/// </summary>
/// <param name="index"> The index. </param>
/// <param name="tableName"> The table name. </param>
/// <param name="schema"> The schema. </param>
/// <returns> The index filter expression. </returns>
public static string GetFilter([NotNull] this IIndex index, [NotNull] string tableName, [CanBeNull] string schema)
{
var annotation = index.FindAnnotation(RelationalAnnotationNames.Filter);
if (annotation != null)
{
return((string)annotation.Value);
}
var sharedTableRootIndex = index.FindSharedTableRootIndex(tableName, schema);
return(sharedTableRootIndex?.GetFilter(tableName, schema));
}
/// <summary>
/// Returns the index filter expression.
/// </summary>
/// <param name="index"> The index. </param>
/// <param name="storeObject"> The identifier of the containing store object. </param>
/// <returns> The index filter expression. </returns>
public static string GetFilter([NotNull] this IIndex index, StoreObjectIdentifier storeObject)
{
var annotation = index.FindAnnotation(RelationalAnnotationNames.Filter);
if (annotation != null)
{
return((string)annotation.Value);
}
var sharedTableRootIndex = index.FindSharedObjectRootIndex(storeObject);
return(sharedTableRootIndex?.GetFilter(storeObject));
}
/// <summary>
/// Returns a value indicating whether the index is clustered.
/// </summary>
/// <param name="index"> The index. </param>
/// <param name="tableName"> The table name. </param>
/// <param name="schema"> The schema. </param>
/// <returns> <see langword="true" /> if the index is clustered. </returns>
public static bool?IsClustered(
[NotNull] this IIndex index,
[NotNull] string tableName,
[CanBeNull] string schema)
{
var annotation = index.FindAnnotation(SqlServerAnnotationNames.Clustered);
if (annotation != null)
{
return((bool?)annotation.Value);
}
return(GetDefaultIsClustered(index, tableName, schema));
}
/// <summary>
/// Returns the index filter expression.
/// </summary>
/// <param name="index"> The index. </param>
/// <returns> The index filter expression. </returns>
public static string GetFilter([NotNull] this IIndex index)
{
var annotation = index.FindAnnotation(RelationalAnnotationNames.Filter);
return(annotation != null ? (string)annotation.Value : null);
}
