/// <summary>
/// Translates the <paramref name="concatExpression"/> into a string representation.
/// </summary>
/// <param name="concatExpression">The <see cref="DbConcatExpression"/> to translate.</param>
/// <returns><see cref="string"/></returns>
protected override DbExpression VisitConcatExpression(DbConcatExpression concatExpression)
{
string syntax = string.Format("{0} {1}", Visit(concatExpression.LeftExpression),
Visit(concatExpression.RightExpression));
return(ExpressionFactory.Sql(syntax));
}
/// <summary>
/// Translates the <paramref name="concatExpression"/> into a string representation.
/// </summary>
/// <param name="concatExpression">The <see cref="DbConcatExpression"/> to translate.</param>
/// <returns><see cref="DbExpression"/></returns>
protected virtual DbExpression VisitConcatExpression(DbConcatExpression concatExpression)
{
var leftExpression = Visit(concatExpression.LeftExpression);
var rightExpression = Visit(concatExpression.RightExpression);
if (!ReferenceEquals(concatExpression.LeftExpression, leftExpression) ||
!ReferenceEquals(concatExpression.RightExpression, rightExpression))
{
return(ExpressionFactory.Concat(leftExpression, rightExpression));
}
return(concatExpression);
}
/// <summary>
/// Creates a new <see cref="DbConcatExpression"/>.
/// </summary>
/// <param name="leftExpression">The left operand of the concatenate operation.</param>
/// <param name="rightExpression">The right operand of the concatenate operation.</param>
/// <returns>A <see cref="DbConcatExpression"/> instance.</returns>
public DbConcatExpression Concat(DbExpression leftExpression, DbExpression rightExpression)
{
var concatExpression = new DbConcatExpression
{ LeftExpression = leftExpression, RightExpression = rightExpression };
return concatExpression;
}
/// <summary>
/// Translates the <paramref name="concatExpression"/> into a string representation.
/// </summary>
/// <param name="concatExpression">The <see cref="DbConcatExpression"/> to translate.</param>
/// <returns><see cref="string"/></returns>
protected override DbExpression VisitConcatExpression(DbConcatExpression concatExpression)
{
string syntax = string.Format("{0} {1}", Visit(concatExpression.LeftExpression),
Visit(concatExpression.RightExpression));
return ExpressionFactory.Sql(syntax);
}
/// <summary>
/// Translates the <paramref name="concatExpression"/> into a string representation.
/// </summary>
/// <param name="concatExpression">The <see cref="DbConcatExpression"/> to translate.</param>
/// <returns><see cref="DbExpression"/></returns>
protected virtual DbExpression VisitConcatExpression(DbConcatExpression concatExpression)
{
var leftExpression = Visit(concatExpression.LeftExpression);
var rightExpression = Visit(concatExpression.RightExpression);
if (!ReferenceEquals(concatExpression.LeftExpression, leftExpression) ||
!ReferenceEquals(concatExpression.RightExpression, rightExpression))
{
return ExpressionFactory.Concat(leftExpression, rightExpression);
}
return concatExpression;
}
