/// <summary>
/// Checks if given statement is allowed for this column type.
/// </summary>
/// <returns>True if allowed; false otherwise.</returns>
internal bool IsAllowed(StatementKeyword statementKeyword)
{
switch (statementKeyword.StatementType)
{
case StatementType.IsEmpty:
case StatementType.IsNotEmpty:
return(SystemType.IsNullable());
case StatementType.IsFalse:
case StatementType.IsTrue:
return(SystemType == typeof(bool) || SystemType == typeof(bool?));
}
return(false);
}