public CassandraTableRow(string tableName, CassandraDataProvider provider, Row data, ReadOnlyCollection <string> usedIdentifiers, TableMetadata tableMetadata)
{
TableName = tableName;
_provider = provider;
_data = data;
_usedIdentifiers = usedIdentifiers;
CassandraTableMetadata = tableMetadata;
}
public CassandraTable(string tableName, CassandraDataProvider provider)
{
TableName = tableName;
_provider = provider;
_cassandraTableMetadata = _provider.CassandraMetadata.GetTable(_provider.CassandraSession.Keyspace, tableName);
if (provider.SupportCount)
{
Row row = provider.CassandraSession.Execute(string.Format("select count(*) from {0};", tableName)).First();
Count = int.Parse(row["count"].ToString());
}
SchemaRow = new CassandraTableRow(tableName, _provider, null, UsedIdentifiers, _cassandraTableMetadata);
}
public CassandraTableColumn(string columnName, Type dataType, object content, string type)
{
ColumnName = columnName;
DataType = dataType;
Content = content;
CassandraColumnType = type;
switch (dataType.Name)
{
case "IDictionary`2":
DataType = typeof(string);
Content = CassandraDataProvider.DictionaryToSeparatedPairs(",", content as IDictionary <string, string>);
break;
case "IEnumerable`1":
DataType = typeof(string);
Content = CassandraDataProvider.ListToSeparatedString(",", content as IList <string> != null ? content as IList <string> : content as string[]);
break;
default:
break;
}
}
public IEnumerable <ITableRow> GetRows(bool init)
{
string query = string.Format("select {0} from {1} {2} {3} {4};",
(UsedIdentifiers != null && UsedIdentifiers.Count > 0) ? CassandraDataProvider.ListToSeparatedString(",", UsedIdentifiers) : "*",
TableName,
(!string.IsNullOrEmpty(_whereClause)) ? string.Format("where {0}", _whereClause) : string.Empty,
(!string.IsNullOrEmpty(_orderClause)) ? string.Format("order by {0}", _orderClause) : string.Empty,
(!string.IsNullOrEmpty(_whereClause)) ? "allow filtering" : string.Empty);
SimpleStatement statement = new SimpleStatement(query);
RowSet rows = new RowSet();
try
{
rows = _provider.CassandraSession.Execute(statement);
}
catch (Exception ex)
{
_provider.Logger.Error(LogCategory.DataProvider, "Cassandra: Error while executing statement:\n{0}\n\nDetails:\n{1}", query, ex.ToString());
throw;
}
finally
{
_orderClause = null;
_whereClause = null;
}
foreach (var row in rows)
{
yield return(new CassandraTableRow(TableName, _provider, row, UsedIdentifiers, _cassandraTableMetadata));
}
}
