/// <summary>
/// Translates the <paramref name="existsExpression"/> into a string representation.
/// </summary>
/// <param name="existsExpression">The <see cref="DbExistsExpression"/> to translate.</param>
/// <returns><see cref="string"/></returns>
protected override DbExpression VisitExistsExpression(DbExistsExpression existsExpression)
{
var syntax = string.Format("EXISTS{0}", Visit(existsExpression.SubSelectExpression));
return ExpressionFactory.Sql(syntax);
}
/// <summary>
/// Translates the <paramref name="existsExpression"/> into a string representation.
/// </summary>
/// <param name="existsExpression">The <see cref="DbExistsExpression"/> to translate.</param>
/// <returns><see cref="string"/></returns>
protected override DbExpression VisitExistsExpression(DbExistsExpression existsExpression)
{
var syntax = string.Format("EXISTS{0}", Visit(existsExpression.SubSelectExpression));
return(ExpressionFactory.Sql(syntax));
}
/// <summary>
/// Translates the <paramref name="existsExpression"/> into a string representation.
/// </summary>
/// <param name="existsExpression">The <see cref="DbExistsExpression"/> to translate.</param>
/// <returns><see cref="DbExpression"/></returns>
protected virtual DbExpression VisitExistsExpression(DbExistsExpression existsExpression)
{
var subSelectExpression = Visit(existsExpression.SubSelectExpression);
if (!ReferenceEquals(existsExpression.SubSelectExpression, subSelectExpression))
return ExpressionFactory.Exists((DbQuery<DbSelectExpression>)subSelectExpression);
return existsExpression;
}