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public Delete ( |
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| db | A database handle returned by mdb_dbi_open() | |
| key | byte | The key to delete from the database |
| return | void | |
public static void Delete <TKey, TValue>(this LightningTransaction txn, LightningDatabase db, TKey key, TValue value)
{
var keyBytes = db.ToBytes(key);
var valueBytes = db.ToBytes(value);
txn.Delete(db, keyBytes, valueBytes);
}
public static void Delete <TKey>(this LightningTransaction txn, LightningDatabase db, TKey key)
{
var keyBytes = db.ToBytes(key);
txn.Delete(db, keyBytes);
}
/// <summary>
/// Deletes a value from a database for duplicated key values.
/// </summary>
/// <typeparam name="TKey">Key type.</typeparam>
/// <typeparam name="TValue"></typeparam>
/// <param name="txn">Transaction.</param>
/// <param name="key">Key.</param>
/// <param name="value">Value.</param>
public static void Delete <TKey, TValue>(this LightningTransaction txn, TKey key, TValue value)
{
txn.Delete(txn.OpenDatabase(), key, value);
}
/// <summary>
/// Delete items from a database.
/// This function removes key/data pairs from the database.
/// If the database does not support sorted duplicate data items (MDB_DUPSORT) the data parameter is ignored.
/// If the database supports sorted duplicates and the data parameter is NULL, all of the duplicate data items for the key will be deleted.
/// Otherwise, if the data parameter is non-NULL only the matching data item will be deleted.
/// This function will return MDB_NOTFOUND if the specified key/data pair is not in the database.
/// </summary>
/// <param name="txn">A transaction</param>
/// <param name="key">The key to delete from the database</param>
/// <param name="value">The data to delete (optional)</param>
public static void Delete(this LightningTransaction txn, byte[] key, byte[] value = null)
{
txn.Delete(txn.OpenDatabase(), key, value);
}
/// <summary>
/// Deletes data from database by key.
/// </summary>
/// <typeparam name="TKey">Key type.</typeparam>
/// <param name="txn">Transaction.</param>
/// <param name="key">Key.</param>
public static void Delete <TKey>(this LightningTransaction txn, TKey key)
{
txn.Delete(txn.OpenDatabase(), key);
}
