public override Expression VisitMissingSearchParameter(MissingSearchParameterExpression expression, object context)
{
if (expression.IsMissing)
{
return(Expression.MissingSearchParameter(expression.Parameter, false));
}
return(expression);
}
public override Expression VisitMissingSearchParameter(MissingSearchParameterExpression expression, object context)
{
if (expression.Parameter.Code == SearchParameterNames.LastUpdated)
{
return(Expression.MissingSearchParameter(SqlSearchParameters.ResourceSurrogateIdParameter, expression.IsMissing));
}
return(expression);
}
public static void ValidateMissingParamExpression(
Expression expression,
string expectedParamName,
bool expectedIsMissing)
{
MissingSearchParameterExpression mpExpression = Assert.IsType <MissingSearchParameterExpression>(expression);
Assert.Equal(expectedParamName, mpExpression.Parameter.Name);
Assert.Equal(expectedIsMissing, mpExpression.IsMissing);
}
public void Visit(MissingSearchParameterExpression expression)
{
if (expression.Parameter.Name == SearchParameterNames.ResourceType)
{
// this will always be present
_queryBuilder.Append(expression.IsMissing ? "false" : "true");
}
else
{
AppendSubquery(expression.Parameter.Name, null, negate: expression.IsMissing);
}
_queryBuilder.AppendLine();
}
public object VisitMissingSearchParameter(MissingSearchParameterExpression expression, Context context)
{
if (expression.Parameter.Code == SearchParameterNames.ResourceType)
{
// this will always be present
_queryBuilder.Append(expression.IsMissing ? "false" : "true");
}
else
{
AppendSubquery(expression.Parameter.Code, null, negate: expression.IsMissing, context: context);
}
_queryBuilder.AppendLine();
return(null);
}
public override SearchParameterQueryGeneratorContext VisitMissingSearchParameter(MissingSearchParameterExpression expression, SearchParameterQueryGeneratorContext context)
{
// Call this method but discard the result to ensure the search parameter is one we are expecting.
GetSearchParameterQueryGenerator(expression);
context.StringBuilder.Append(expression.IsMissing ? " 1 = 0 " : " 1 = 1 ");
return(context);
}
public override SearchParameterQueryGeneratorContext VisitMissingSearchParameter(MissingSearchParameterExpression expression, SearchParameterQueryGeneratorContext context)
{
Debug.Assert(!expression.IsMissing, "IsMissing=true expressions should have been rewritten");
short searchParamId = context.Model.GetSearchParamId(expression.Parameter.Url);
SmallIntColumn searchParamIdColumn = VLatest.SearchParam.SearchParamId;
context.StringBuilder
.Append(searchParamIdColumn, context.TableAlias)
.Append(" = ")
.AppendLine(context.Parameters.AddParameter(searchParamIdColumn, searchParamId).ParameterName);
return(context);
}
public NormalizedSearchParameterQueryGenerator VisitMissingSearchParameter(MissingSearchParameterExpression expression, object context)
{
return(VisitSearchParameterExpressionBase(expression.Parameter, null, context));
}
public override bool VisitMissingSearchParameter(MissingSearchParameterExpression expression, object context)
{
return(expression.IsMissing);
}
public override SearchParameterQueryGeneratorContext VisitMissingSearchParameter(MissingSearchParameterExpression expression, SearchParameterQueryGeneratorContext context)
{
SearchParameterQueryGenerator delegatedGenerator = GetSearchParameterQueryGeneratorIfResourceColumnSearchParameter(expression);
if (delegatedGenerator != null)
{
// This is a search parameter over a column that exists on the Resource table or both the Resource table and search parameter tables.
// Delegate to the visitor specific to it.
return(expression.AcceptVisitor(delegatedGenerator, context));
}
Debug.Assert(!expression.IsMissing, "IsMissing=true expressions should have been rewritten");
short searchParamId = context.Model.GetSearchParamId(expression.Parameter.Url);
SmallIntColumn searchParamIdColumn = VLatest.SearchParam.SearchParamId;
context.StringBuilder
.Append(searchParamIdColumn, context.TableAlias)
.Append(" = ")
.AppendLine(context.Parameters.AddParameter(searchParamIdColumn, searchParamId, true).ParameterName);
return(context);
}
public override SearchParameterQueryGeneratorContext VisitMissingSearchParameter(MissingSearchParameterExpression expression, SearchParameterQueryGeneratorContext context)
{
context.StringBuilder.Append(expression.IsMissing ? " 1 = 0 " : " 1 = 1 ");
return(context);
}
public override SearchParameterQueryGeneratorContext VisitMissingSearchParameter(MissingSearchParameterExpression expression, SearchParameterQueryGeneratorContext context)
{
return(expression.AcceptVisitor(GetSearchParameterQueryGenerator(expression), context));
}