public SqlRandomTable(SqlRandomTableColumn[] columns, int? primaryKeyColumnIndex = null, int estimatedRowCount = 0)
{
if (columns == null || columns.Length == 0)
throw new ArgumentException("non-empty type array is required");
if (estimatedRowCount < 0)
throw new ArgumentOutOfRangeException("non-negative row count is required, use 0 for default");
if (primaryKeyColumnIndex.HasValue && (primaryKeyColumnIndex.Value < 0 || primaryKeyColumnIndex.Value >= columns.Length))
throw new ArgumentOutOfRangeException("primaryColumnIndex");
PrimaryKeyColumnIndex = primaryKeyColumnIndex;
_columns = (SqlRandomTableColumn[])columns.Clone();
_columnNames = new string[columns.Length];
if (estimatedRowCount == 0)
_rows = new List<object[]>();
else
_rows = new List<object[]>(estimatedRowCount);
Columns = new List<SqlRandomTableColumn>(_columns).AsReadOnly();
ColumnNames = new List<string>(_columnNames).AsReadOnly();
bool hasSparse = false;
double totalNonSparse = 0;
foreach (var c in _columns)
{
if (c.IsSparse)
{
hasSparse = true;
}
else
{
totalNonSparse += c.GetInRowSize(null); // for non-sparse columns size does not depend on the value
}
}
HasSparseColumns = hasSparse;
NonSparseValuesTotalSize = totalNonSparse;
}