protected override Expression VisitConstant(ConstantExpression node)
{
if (node.IsQueryable())
{
mCannotBeEvaluated = true;
}
return(base.VisitConstant(node));
}
protected override Expression VisitConstant(ConstantExpression node)
{
if (node.IsQueryable())
{
mLimitingDataReaderMode = LimitingDataReaderMode.None;
mIsSequence = true;
mElementType = TypeSystem.GetElementType(node.Type);
var schema = @"dbo";
var table = mElementType.Name;
var tableAttributes = mElementType.GetCustomAttributes(typeof(TableAttribute), true).Cast <TableAttribute>();
foreach (var tableAttribute in tableAttributes)
{
if (!string.IsNullOrEmpty(tableAttribute.SchemaName))
{
schema = tableAttribute.SchemaName;
}
if (!string.IsNullOrEmpty(tableAttribute.Name))
{
table = tableAttribute.Name;
}
}
mText.Append(@"SELECT");
var separator = @" ";
var properties = mElementType.GetProperties(BindingFlags.Public | BindingFlags.Instance)
.Where(a => a.CanRead && a.CanWrite);
foreach (var property in properties)
{
mProperties.Add(property);
var column = GetColumnName(property);
mText.Append(separator);
mText.Append(EncodeSqlName(column));
separator = @", ";
}
mText.Append(@" FROM ");
mText.Append(EncodeSqlName(schema));
mText.Append(@".");
mText.Append(EncodeSqlName(table));
}
else
{
mText.Append(node.Value.ToSqlConstant());
}
return(base.VisitConstant(node));
}
