/// <summary>
/// Initializes a new instance of the <see cref="SqlSubquery"/> class using the
/// specified <paramref name="query"/> and <paramref name="alias"/>.
/// </summary>
/// <param name="query">
/// The <see cref="SqlSelect"/> query to use as an expression.
/// </param>
/// <param name="alias">
/// The alias used for the subquery.
/// </param>
/// <exception cref="ArgumentNullException">
/// Thrown when the <paramref name="query"/> or <paramref name="alias"/> argument is
/// <see langword="null"/>.
/// </exception>
public SqlSubquery(ISqlGo<SqlSelect> query, string alias)
: base(alias)
{
if (query == null) throw new ArgumentNullException(nameof(query));
Query = query.Go();
}
/// <summary>
/// Converts the specified SQL expression tree builder to an <see cref="IDbCommand"/>
/// instance for the specified <paramref name="connection" />.
/// </summary>
/// <param name="sql">
/// The SQL expression tree builder to convert to an <see cref="IDbCommand"/>.
/// </param>
/// <param name="connection">
/// The <see cref="IDbConnection"/> for which to create an <see cref="IDbCommand"/>.
/// </param>
/// <returns>
/// An <see cref="IDbCommand"/> for the specified <paramref name="connection"/> that reprents
/// the specified SQL expression tree.
/// </returns>
/// <remarks>
/// Any <see cref="SqlParameter"/> members of the SQL expression tree builder are
/// automatically converted to <see cref="IDbDataParameter"/> instances and attached to
/// the returned <see cref="IDbCommand"/>.
/// </remarks>
public static IDbCommand ToCommand <T>(this ISqlGo <T> sql, IDbConnection connection)
where T : SqlStatement
{
if (sql == null)
{
throw new ArgumentNullException(nameof(sql));
}
return(connection.CreateCommandInternal(sql.Go()));
}
/// <summary>
/// Converts the specified SQL expression tree builder to SQL text.
/// </summary>
/// <typeparam name="T">
/// The type of SQL statement the SQL expression tree builder creates.
/// </typeparam>
/// <param name="sql">
/// An expression tree builder representing a SQL statement.
/// </param>
/// <param name="dialect">
/// The <see cref="SqlDialect"/> used to format the SQL text.
/// </param>
/// <param name="parameterCallback">
/// A delegate that is called when a SQL parameter is encountered while converting the SQL expression.
/// </param>
/// <returns>
/// The SQL text for the specified SQL expression tree builder.
/// </returns>
public static string ToSql <T>(this ISqlGo <T> sql, SqlDialect dialect, Action <SqlParameter> parameterCallback)
where T : SqlStatement
{
if (sql == null)
{
throw new ArgumentNullException(nameof(sql));
}
return(sql.Go().ToSqlInternal(dialect, parameterCallback));
}
/// <summary>
/// Initializes a new instance of the <see cref="SqlSubquery"/> class using the
/// specified <paramref name="query"/> and <paramref name="alias"/>.
/// </summary>
/// <param name="query">
/// The <see cref="SqlSelect"/> query to use as an expression.
/// </param>
/// <param name="alias">
/// The alias used for the subquery.
/// </param>
/// <exception cref="ArgumentNullException">
/// Thrown when the <paramref name="query"/> or <paramref name="alias"/> argument is
/// <see langword="null"/>.
/// </exception>
public SqlSubquery(ISqlGo <SqlSelect> query, string alias)
: base(alias)
{
if (query == null)
{
throw new ArgumentNullException(nameof(query));
}
Query = query.Go();
}