public override void Initialize()
{
var indexSegments =
Execute(IndexSegmentCommandText)
.Select(o => IndexSegment.CreateFrom(SqlHelper, o))
.ToLookup(x => x.IndexName);
m_Indices =
Execute(IndexCommandText)
.Select(o => Index.CreateFrom(SqlHelper, o, indexSegments))
.ToDictionary(x => x.IndexName);
m_IndicesByRelation = m_Indices.Values
.ToMultiDictionary(x => x.RelationName);
}
private IEnumerable <Command> DropCreateHelper(Index index, IMetadata other, IComparerContext context)
{
if (!context.DroppedObjects.Contains(index.TypeObjectNameKey))
{
foreach (var item in index.Drop(Metadata, other, context))
{
yield return(item);
}
}
foreach (var item in index.Create(Metadata, other, context))
{
yield return(item);
}
}
private IEnumerable <ITypeObjectNameKey> GetDependenciesFor(Index index)
{
return(GetDependencies(index.IndexName, _ => true));
}
private static bool IndicesToBeDroppedPredicate(Index index, IMetadata metadata, IComparerContext context)
{
return(!context.DroppedObjects.Contains(index.TypeObjectNameKey) &&
!(metadata.MetadataIndices.Indices.TryGetValue(index.IndexName, out var otherIndex) && otherIndex.IsUserCreatedIndex));
}
private static bool IndicesToBeDropCreatedPredicate(Index index, IMetadata metadata, IComparerContext context)
{
return(metadata.MetadataIndices.Indices.TryGetValue(index.IndexName, out var otherIndex) &&
index != otherIndex &&
!index.CanAlter(otherIndex));
}
private static bool IndicesToBeCreatedPredicate(Index index, IMetadata metadata, IComparerContext context)
{
return(!(metadata.MetadataIndices.Indices.TryGetValue(index.IndexName, out var otherIndex) && otherIndex.IsUserCreatedIndex));
}
