/// <summary>
/// Determine if records exist by filter.
/// </summary>
/// <param name="tableName">The name of the table.</param>
/// <param name="filter">Expression.</param>
/// <returns>True if records exist.</returns>
public bool Exists(string tableName, Expression filter)
{
if (String.IsNullOrEmpty(tableName))
{
throw new ArgumentNullException(nameof(tableName));
}
DataTable result = Query(PostgresqlHelper.ExistsQuery(tableName, filter));
if (result != null && result.Rows.Count > 0)
{
return(true);
}
return(false);
}
