/// <summary>
/// Tries the rename column name async.
/// </summary>
/// <param name="dbColumns">The db columns.</param>
/// <param name="tableName">The table name.</param>
/// <param name="oldColumnName">The old column name.</param>
/// <param name="newColumnName">The new column name.</param>
/// <param name="typeCode">The type code.</param>
/// <param name="isNotNull">If true, is not null.</param>
/// <param name="length">The length.</param>
/// <param name="databaseName">The database name.</param>
/// <returns>A Task.</returns>
public static async Task <int> TryRenameColumnNameAsync(this DbColumns dbColumns, string tableName, string oldColumnName, string newColumnName, TypeCode typeCode, bool isNotNull, int length = 0, string databaseName = "")
{
var exist = await dbColumns.IsExistColumnAsync(tableName, oldColumnName);
if (!exist)
{
return(await dbColumns.RenameColumnAsync(tableName, oldColumnName, newColumnName, typeCode, isNotNull, length, databaseName));
}
return(-1);
}
/// <summary>
/// Tries the add column async.
/// </summary>
/// <param name="dbColumns">The db columns.</param>
/// <param name="columnName">The column name.</param>
/// <param name="typeCode">The type code.</param>
/// <param name="isNotNull">If true, is not null.</param>
/// <param name="length">The length.</param>
/// <param name="databaseName">The database name.</param>
/// <returns>A Task.</returns>
public static async Task <int> TryAddColumnAsync <T>(this DbColumns dbColumns, string columnName, TypeCode typeCode, bool isNotNull, int length = 0, string databaseName = "")
{
var exist = await dbColumns.IsExistColumnAsync <T>(columnName);
if (!exist)
{
return(await dbColumns.AddColumnsAsync <T>(columnName, typeCode, isNotNull, length, databaseName));
}
return(-1);
}