/// <summary>
/// Renames user table, if it existed.
/// <para>If there are threads which are working with this table, rename will not be finished and will return false</para>
/// </summary>
/// <param name="oldUserTableName"></param>
/// <param name="newUserTableName"></param>
/// <returns>true if successfully renamed, otherwise false</returns>
private bool RenameTableInternal(string oldUserTableName, string newUserTableName)
{
this.DeleteTable(newUserTableName);
_sync_openTablesHolder.EnterWriteLock();
try
{
string oldTableName = GetUserTableNameAsString(oldUserTableName);
string newTableName = GetUserTableNameAsString(newUserTableName);
OpenTable ot = null;
string alternativeTableLocation = String.Empty;
bool inMemory = false;
_openTablesHolder.TryGetValue(oldTableName, out ot);
if (CheckAlternativeTableLocationsIntersections(oldUserTableName, out alternativeTableLocation))
{
if (alternativeTableLocation == String.Empty)
{
//In-Memory Table
inMemory = true;
}
else
{
if (ot != null)
{
return(false); //Other threads are working with this table
}
}
}
else
{
if (Engine.Configuration.Storage == DBreezeConfiguration.eStorage.MEMORY)
{
//In-Memory Table
inMemory = true;
}
else
{
if (ot != null)
{
return(false); //Other threads are working with this table
}
}
}
//Changing key in Schema db
byte[] btOldTableName = GetUserTableNameAsByte(oldUserTableName);
byte[] btNewTableName = GetUserTableNameAsByte(newUserTableName);
LTrie.ChangeKey(ref btOldTableName, ref btNewTableName);
LTrie.Commit();
this.cachedTableNames.Remove(oldTableName);
if (inMemory && ot != null)
{
//Changing reference for in-memory table,
_openTablesHolder.Add(newTableName, ot);
_openTablesHolder.Remove(oldTableName);
}
}
catch (System.Exception ex)
{
DBreezeException.Throw(DBreezeException.eDBreezeExceptions.SCHEME_TABLE_RENAME_FAILED, oldUserTableName, ex);
}
finally
{
_sync_openTablesHolder.ExitWriteLock();
}
return(true);
}
