/// <summary>
/// Drop an index from a collection
/// </summary>
public bool DropIndex(string collection, string name)
{
if (collection.IsNullOrWhiteSpace())
{
throw new ArgumentNullException(nameof(collection));
}
if (name.IsNullOrWhiteSpace())
{
throw new ArgumentNullException(nameof(name));
}
if (name == "_id")
{
throw LiteException.IndexDropId();
}
return(this.AutoTransaction(transaction =>
{
var snapshot = transaction.CreateSnapshot(LockMode.Write, collection, false);
var col = snapshot.CollectionPage;
var indexer = new IndexService(snapshot);
// no collection, no index
if (col == null)
{
return false;
}
// search for index reference
var index = col.GetCollectionIndex(name);
// no index, no drop
if (index == null)
{
return false;
}
// delete all data pages + indexes pages
indexer.DropIndex(index);
// remove index entry in collection page
snapshot.CollectionPage.DeleteCollectionIndex(name);
return true;
}));
}