public override DbExpression Visit(DbOrElseExpression exp)
{
Stack <DbExpression> operands = GatherBinaryExpressionOperand(exp);
this.ConcatOperands(operands, " OR ");
return(exp);
}
static void Method_String_IsNullOrEmpty(DbMethodCallExpression exp, SqlGenerator generator)
{
EnsureMethod(exp, UtilConstants.MethodInfo_String_IsNullOrEmpty);
DbExpression e = exp.Arguments.First();
DbEqualExpression equalNullExpression = DbExpression.Equal(e, DbExpression.Constant(null, UtilConstants.TypeOfString));
DbEqualExpression equalEmptyExpression = DbExpression.Equal(e, DbExpression.Constant(string.Empty));
DbOrElseExpression orElseExpression = DbExpression.OrElse(equalNullExpression, equalEmptyExpression);
DbCaseWhenExpression.WhenThenExpressionPair whenThenPair = new DbCaseWhenExpression.WhenThenExpressionPair(orElseExpression, DbConstantExpression.One);
List <DbCaseWhenExpression.WhenThenExpressionPair> whenThenExps = new List <DbCaseWhenExpression.WhenThenExpressionPair>(1);
whenThenExps.Add(whenThenPair);
DbCaseWhenExpression caseWhenExpression = DbExpression.CaseWhen(whenThenExps, DbConstantExpression.Zero, UtilConstants.TypeOfBoolean);
var eqExp = DbExpression.Equal(caseWhenExpression, DbConstantExpression.One);
eqExp.Accept(generator);
}
public override ISqlPart Visit(DbOrElseExpression dbExpression)
{
throw new NotImplementedException();
}
public override DbExpression Visit(DbOrElseExpression exp)
{
return(this.VisistDbBooleanExpression(exp));
}
public abstract T Visit(DbOrElseExpression exp);
