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• What 5 things should SQL Server get rid of?

  - by BuckWoody

  I’ve been “tagged” by my friend Paul Randal. It’s a high-tech way of making someone else do what you want, but since it’s Paul, well, I guess I’m OK with that. He’s asked in his recent blog entry “What five things would you get rid of in SQL Server if you were in charge?” This is, of course, a delicate issue. After all, I work at Microsoft, so anything I say here might be taken as a criticism that would require action – but of course it really doesn’t. Interestingly, you may have more to do with what goes in to SQL Server than I did even as a Program Manager where I “owned” a feature. Unlike many places I’ve worked, Microsoft really does drive its products by what its users want – not every time, and not every user request, mind you, but overall I think we hit the mark pretty well. So, with all of that said, and of course the obligatory statement of “these are my own opinions, and have nothing to do with any official Microsoft position in any way, and do not reflect the opinions of other Microsoft employees or management”, here goes. 1. Get rid of SQL Server Management Studio Does that surprise you? After all, when I was a Program Manager, I actually owned the general architecture for SSMS. But those on my team probably would have been able to guess this one for you. I think that SSMS is a fine development tool. But I think that it does less of a good job for managing a system. It’s based on Visual Studio, probably one of the best development IDE’s around. And when I develop code, I really like it. But for a monitoring/management tool, I prefer a snap-in to the Microsoft Management Console (MMC). I know, the old one (prior to 3.0) was kludgy, difficult to use and program in. But that’s changed. Of course, when I bring this up, you’ll probably immediately say “But I don’t have that in XP.” And that’s one of the reasons we didn’t go there. (But I still don’t like SSMS for management.) 2. ShrinkDB I think this discussion has been done to death, so I’ll leave it at that. 3. SQL Server Agent Does that one surprise you as well? In my mind, since we ALWAYS ride on Windows, just use the task scheduler there, along with PowerShell. You could log the results in Windows logs, files, back into SQL Server, whatever. It’s just a complexity we don’t need in SQL Server. 4. SQL Server Error Logs We have a full logging setup in Windows. They’re well done, easy to understand and ubiquitous. We should just use that. 5. Several SKU’s I won’t say which, but we have a few SKU’s of SQL Server that need to go. And we need to figure out how to help you understand clearly where you need to go to Enterprise or Data Center.  Most folks are trying to push Standard edition to do things it isn’t designed to do, and then they think SQL Server won’t scale. I think we can do a better job of showing you where Standard Edition will hit the wall, and I think with fewer choices it would be pretty simple for you to pick the right one. Well, once again I’ve probably puzzled some folks and angered others. I think my work here is done. :) Back to you, Paul. Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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• Please Critique this PHP Login Script

  - by NightMICU

  Greetings, A site I developed was recently compromised, most likely by a brute force or Rainbow Table attack. The original log-in script did not have a SALT, passwords were stored in MD5. Below is an updated script, complete with SALT and IP address banning. In addition, it will send a Mayday email & SMS and disable the account should the same IP address or account attempt 4 failed log-ins. Please look it over and let me know what could be improved, what is missing, and what is just plain strange. Many thanks! <?php //Start session session_start(); //Include DB config include $_SERVER['DOCUMENT_ROOT'] . '/includes/pdo_conn.inc.php'; //Error message array $errmsg_arr = array(); $errflag = false; //Function to sanitize values received from the form. Prevents SQL injection function clean($str) { $str = @trim($str); if(get_magic_quotes_gpc()) { $str = stripslashes($str); } return $str; } //Define a SALT, the one here is for demo define('SALT', '63Yf5QNA'); //Sanitize the POST values $login = clean($_POST['login']); $password = clean($_POST['password']); //Encrypt password $encryptedPassword = md5(SALT . $password); //Input Validations //Obtain IP address and check for past failed attempts $ip_address = $_SERVER['REMOTE_ADDR']; $checkIPBan = $db->prepare("SELECT COUNT(*) FROM ip_ban WHERE ipAddr = ? OR login = ?"); $checkIPBan->execute(array($ip_address, $login)); $numAttempts = $checkIPBan->fetchColumn(); //If there are 4 failed attempts, send back to login and temporarily ban IP address if ($numAttempts == 1) { $getTotalAttempts = $db->prepare("SELECT attempts FROM ip_ban WHERE ipAddr = ? OR login = ?"); $getTotalAttempts->execute(array($ip_address, $login)); $totalAttempts = $getTotalAttempts->fetch(); $totalAttempts = $totalAttempts['attempts']; if ($totalAttempts >= 4) { //Send Mayday SMS $to = "[email protected]"; $subject = "Banned Account - $login"; $mailheaders = 'From: [email protected]' . "\r\n"; $mailheaders .= 'Reply-To: [email protected]' . "\r\n"; $mailheaders .= 'MIME-Version: 1.0' . "\r\n"; $mailheaders .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n"; $msg = "<p>IP Address - " . $ip_address . ", Username - " . $login . "</p>"; mail($to, $subject, $msg, $mailheaders); $setAccountBan = $db->query("UPDATE ip_ban SET isBanned = 1 WHERE ipAddr = '$ip_address'"); $setAccountBan->execute(); $errmsg_arr[] = 'Too Many Login Attempts'; $errflag = true; } } if($login == '') { $errmsg_arr[] = 'Login ID missing'; $errflag = true; } if($password == '') { $errmsg_arr[] = 'Password missing'; $errflag = true; } //If there are input validations, redirect back to the login form if($errflag) { $_SESSION['ERRMSG_ARR'] = $errmsg_arr; session_write_close(); header('Location: http://somewhere.com/login.php'); exit(); } //Query database $loginSQL = $db->prepare("SELECT password FROM user_control WHERE username = ?"); $loginSQL->execute(array($login)); $loginResult = $loginSQL->fetch(); //Compare passwords if($loginResult['password'] == $encryptedPassword) { //Login Successful session_regenerate_id(); //Collect details about user and assign session details $getMemDetails = $db->prepare("SELECT * FROM user_control WHERE username = ?"); $getMemDetails->execute(array($login)); $member = $getMemDetails->fetch(); $_SESSION['SESS_MEMBER_ID'] = $member['user_id']; $_SESSION['SESS_USERNAME'] = $member['username']; $_SESSION['SESS_FIRST_NAME'] = $member['name_f']; $_SESSION['SESS_LAST_NAME'] = $member['name_l']; $_SESSION['SESS_STATUS'] = $member['status']; $_SESSION['SESS_LEVEL'] = $member['level']; //Get Last Login $_SESSION['SESS_LAST_LOGIN'] = $member['lastLogin']; //Set Last Login info $updateLog = $db->prepare("UPDATE user_control SET lastLogin = DATE_ADD(NOW(), INTERVAL 1 HOUR), ip_addr = ? WHERE user_id = ?"); $updateLog->execute(array($ip_address, $member['user_id'])); session_write_close(); //If there are past failed log-in attempts, delete old entries if ($numAttempts > 0) { //Past failed log-ins from this IP address. Delete old entries $deleteIPBan = $db->prepare("DELETE FROM ip_ban WHERE ipAddr = ?"); $deleteIPBan->execute(array($ip_address)); } if ($member['level'] != "3" || $member['status'] == "Suspended") { header("location: http://somewhere.com"); } else { header('Location: http://somewhere.com'); } exit(); } else { //Login failed. Add IP address and other details to ban table if ($numAttempts < 1) { //Add a new entry to IP Ban table $addBanEntry = $db->prepare("INSERT INTO ip_ban (ipAddr, login, attempts) VALUES (?,?,?)"); $addBanEntry->execute(array($ip_address, $login, 1)); } else { //increment Attempts count $updateBanEntry = $db->prepare("UPDATE ip_ban SET ipAddr = ?, login = ?, attempts = attempts+1 WHERE ipAddr = ? OR login = ?"); $updateBanEntry->execute(array($ip_address, $login, $ip_address, $login)); } header('Location: http://somewhere.com/login.php'); exit(); } ?>

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• Windows server 2003 default administrator password

  - by Jason Baker

  Sorry if this is an overly simplistic question, but I'm a bit stuck here. :) I need a windows machine for me to do some programming for class. Since I have my Macbook with me everywhere I go, I figured that it would be easiest to install a vm. And since I can get a copy of Windows server 2k3 for free via dreamspark, I thought I'd try to do that. Here's what happened though: I installed windows server (disk one). When the system booted up, vmware automatically installed VMWare tools and prompted me to restart. There was also a prompt to start the installation of disc 2, but I figured it would be better to restart before doing that. When the machine came back up, I was prompted to log in as the administrator. The problem is that I wasn't prompted to make an administrator account or password. Is there a default password I can use? I've tried all the obvious ones (blank, password, etc) and googling, but I didn't come up with anything.

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• Exporting to PNG from Adobe Illustrator cutting off edges

  - by Luther Baker

  I created a 40px x 40px image in Adobe Illustrator CS4. I saved as an .ai file and then tried to export as a PNG. Adobe Illustrator automatically crops the background and tightens the export to a rect around all the objects which if fine. In this case, I am not working edge to edge so my image is not quite 40px wide. But, unfortunately, Illustrator is not exporting the entire image. I end up with an image that is 34px wide. Indeed, the icon I draw starts on the left hand side but the right edge of my object cut off. Any ideas why this is happening? I can't imagine Illustrator CS4 can't correctly to export to PNG.

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• NHibernate: QueryOver<> help

  - by Andy Baker

  Hi, I'm just starting out with NHibernate and I'm having trouble with running more complex queries. I have entities with a list of tags attached. The user will provide two lists of tags, include and exclude. I need to find all the entities that have all of the include tags, and exclude any entites that have any tag in the exclude list. Below is my first effort- which is clearly wrong as its listing all Display objects that have any of the include tags rather than all! Any assistance is greatly appeciated. var includeTagIds = (from tag in regime.IncludeTags select tag.Id).ToList<int>(); var excludeTagIds = from tag in regime.ExcludeTags select tag.Id; var displays = session.QueryOver<Display>() .JoinQueryOver<DisplayTag>(display => display.Tags) .WhereRestrictionOn(tag => tag.Id) .IsIn(includeTagIds).List().Distinct(); return displays.ToList();

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• Using a UITextView in a UITableViewCell with a UIKeyboard

  - by Luther Baker

  I have a simple UITableView that has two cells. Cell 0:0 consists of a UITextField we'll call the title and Cell 0:1 consists of a UITextView we'll simply call a note. Cell 0:0 (the text field) is a standard size, one row cell. I'm therefore trying to fill the rest of the screen up with Cell 0:1 so I return a larger height for it. This all displays just fine and I'm using most of the iPhone real estate pretty efficiently at this point. Now, when a user wants to edit one of these cells, he need only click in the appropriate textfield or textview. If a user clicks in the textfield of Cell 0:0, all is well and the keyboard slides up from the bottom. My problem occurs when a user clicks into the the textview (Cell 0:1). No matter what I try, the UITableView wants to slide the entire table view up and that generally put the UITextView in Cell 0:1 halfway out of sight. What I want to do is two fold, I'm registered for when the keyboard will appear and in that method, I'd like to shrink the UITextView in Cell 0:1 as well as shrink the UITableViewCell itself so that the keyboard doesn't have to be smart and think it has to slide the UITableViewCell into view. Unfortunately, no matter what I try, the UITableView slides up. I just want the UITableView to stand still and I want the cell to animate up/shorter with the keyboard. It appears that, by the time the keyboard is actually animating into the screen - it is to late to adjust the cell size. The UIKit has already made up it's mind that it is going to scroll the UITableView.

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• Consuming "Event Tracing for Windows" events

  - by Paul Baker

  An answer to this question has led me to look into using "Event Tracing for Windows" for our tracing needs. I have come across NTrace, which seems to be a good way to produce ETW events from C# code (using the XP-compatible "classic provider" model). However, I am unable to find an easy way to consume these events - to see them in real-time and/or log them to a file. The only way I have found is that described in the NTrace documentation: using a tool which is only available as part of the Windows DDK. In the case of a complex problem in the field, we may need to ask the user to produce a file containing a trace. We can't ask users to download the DDK or carry out a number of complex operations in order to do this. Is there a straightforward, user-friendly way to log ETW events to a file? Also, is it possible for someone to consume ETW events on Windows Vista/7 if they are not running as administrator?

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• Getting JRuby to work in RubyMine

  - by John Baker

  I setup the proper SDK because all my ruby code will compile but RubyMine complains that it can't find the any of my java classes? Is this a flaw or is there a way to get it to recognizewhere the classes are? Here is my code, I have underlined all the things its complaining about require 'java' include_class 'java.awt.event.ActionListener' include_class 'javax.swing.JButton' include_class 'javax.swing.JFrame' class ClickAction include ActionListener def action_performed(event) puts "Button got clicked." end end Is there a way around this because I'd love to buy RubyMine if it's able to inform me of what Java classes and methods I can pick from. Thanks

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• UIToolbar UIBarButtonItem Alignment question

  - by Luther Baker

  I need to create a UIToolbar that has two UIBarButtonItems. The 1st button must be centered and the 2nd item must be right aligned. I understand and use Flexible spacing and it works great when I need to balance buttons across the UIToolbar, but with only two buttons, I can't seem to perfectly center the middle button. I've even initialized the view.toolbarItems array with NSArray *items = [[NSArray alloc] initWithObjects:fixed, flex, center_button, flex, right_button, nil]; and set fixed.width = right_button.width ... but still, the center_button is never perfectly centered.

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• Is there an algorithm for converting quaternion rotations to Euler angle rotations?

  - by Will Baker

  Is there an existing algorithm for converting a quaternion representation of a rotation to an Euler angle representation? The rotation order for the Euler representation is known and can be any of the six permutations (i.e. xyz, xzy, yxz, yzx, zxy, zyx). I've seen algorithms for a fixed rotation order (usually the NASA heading, bank, roll convention) but not for arbitrary rotation order. Furthermore, because there are multiple Euler angle representations of a single orientation, this result is going to be ambiguous. This is acceptable (because the orientation is still valid, it just may not be the one the user is expecting to see), however it would be even better if there was an algorithm which took rotation limits (i.e. the number of degrees of freedom and the limits on each degree of freedom) into account and yielded the 'most sensible' Euler representation given those constraints. I have a feeling this problem (or something similar) may exist in the IK or rigid body dynamics domains. Solved: I just realised that it might not be clear that I solved this problem by following Ken Shoemake's algorithms from Graphics Gems. I did answer my own question at the time, but it occurs to me it may not be clear that I did so. See the answer, below, for more detail. Just to clarify - I know how to convert from a quaternion to the so-called 'Tait-Bryan' representation - what I was calling the 'NASA' convention. This is a rotation order (assuming the convention that the 'Z' axis is up) of zxy. I need an algorithm for all rotation orders. Possibly the solution, then, is to take the zxy order conversion and derive from it five other conversions for the other rotation orders. I guess I was hoping there was a more 'overarching' solution. In any case, I am surprised that I haven't been able to find existing solutions out there. In addition, and this perhaps should be a separate question altogether, any conversion (assuming a known rotation order, of course) is going to select one Euler representation, but there are in fact many. For example, given a rotation order of yxz, the two representations (0,0,180) and (180,180,0) are equivalent (and would yield the same quaternion). Is there a way to constrain the solution using limits on the degrees of freedom? Like you do in IK and rigid body dynamics? i.e. in the example above if there were only one degree of freedom about the Z axis then the second representation can be disregarded. I have tracked down one paper which could be an algorithm in this pdf but I must confess I find the logic and math a little hard to follow. Surely there are other solutions out there? Is arbitrary rotation order really so rare? Surely every major 3D package that allows skeletal animation together with quaternion interpolation (i.e. Maya, Max, Blender, etc) must have solved exactly this problem?

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• SQL Syntax to count unique users completing a task

  - by Belliez

  I have the following code which shows me what users has completed ticket and this lists each user and the date they close a ticket. i.e. Paul Matt Matt Bob Matt Paul Matt Matt At the moment I manually count each user myself to see their totals for the day. EDIT: Changed output as columns instead of rows: What I have been trying to do is get SQL Server to do this for me i.e. the final result to look like: Paul | 2 Matt | 5 Bob | 1 My code I am currently using is and I would be greatful if someone can help me change this so I can get it outputting something similar to above? DECLARE @StartDate DateTime; DECLARE @EndDate DateTime; -- Date format: YYYY-MM-DD SET @StartDate = '2013-11-06 00:00:00' SET @EndDate = GETDATE() -- Today SELECT (select Username from Membership where UserId = Ticket.CompletedBy) as TicketStatusChangedBy FROM Ticket INNER JOIN TicketStatus ON Ticket.TicketStatusID = TicketStatus.TicketStatusID INNER JOIN Membership ON Ticket.CheckedInBy = Membership.UserId WHERE TicketStatus.TicketStatusName = 'Completed' and Ticket.ClosedDate >= @StartDate --(GETDATE() - 1) and Ticket.ClosedDate <= @EndDate --(GETDATE()-0) ORDER BY Ticket.CompletedBy ASC, Ticket.ClosedDate ASC Thank you for your help and time.

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• BNF vs EBNF vs ABNF: which to choose?

  - by Jason Baker

  I want to come up with a language syntax. I have read a bit about these three, and can't really see anything that one can do that another can't. Is there any reason to use one over another? Or is it just a matter of preference?

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• NSFetchedResultsController not updating UITableView's section indexes

  - by Luther Baker

  I am populating a UITableViewController with an NSFetchedResultsController with results creating sections that populate section headers and a section index. I am using the following method to populate the section index: - (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView { return [fetchedResultsController_ sectionIndexTitles]; } and now I've run into a problem. When I add a new element to the NSManagedObjectContext associated with the NSFetchedResultsController, the new element is saved and appropriately displayed as a cell in the UITableView ... except for one thing. If the new element creates a new SECTION, the new section index does not show up in the right hand margin unless I pop the UINavigationController's stack and reload the UITableViewController. I have conformed to the NSFetchedResultsControllerDelegate's interface and manually invoke [self.tableView reloadSectionIndexTitles]; at the end of both these delegate methods: controller:didChangeSection... controller:didChangeObject... and while I can debug and trace the execution into the methods and see the reload call invoked, the UITableView's section index never reflects the section changes. Again, the data shows up - new sections are physically visible (or removed) in the UITableView but the section indexes are not updated. Am I missing something?

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• Fastest way to calculate a 128-bit integer modulo a 64-bit integer

  - by Paul Baker

  I have a 128-bit unsigned integer A and a 64-bit unsigned integer B. What's the fastest way to calculate A % B - that is the (64-bit) remainder from dividing A by B? I'm looking to do this in either C or assembly language, but I need to target the 32-bit x86 platform. This unfortunately means that I cannot take advantage of compiler support for 128-bit integers, nor of the x64 architecture's ability to perform the required operation in a single instruction.

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• Aggregate survey results recursively by manager

  - by Ian Roke

  I have a StaffLookup table which looks like this. UserSrn | UserName | ManagerSrn =============================== ABC1 | Jerome | NULL ABC2 | Joe | ABC1 ABC3 | Paul | ABC2 ABC4 | Jack | ABC3 ABC5 | Daniel | ABC3 ABC6 | David | ABC2 ABC7 | Ian | ABC6 ABC8 | Helen | ABC6 The staff structure looks like this. |- Jerome | |- Joe || ||- Paul ||| |||- Jack ||| |||- Daniel || ||- David ||| |||- Ian ||| |||- Helen I have a list of SurveyResponses that looks like this. UserSrn | QuestionId | ResponseScore ==================================== ABC2 | 1 | 5 ABC2 | 3 | 4 ABC4 | 16 | 3 ... What I am trying to do sounds pretty simple but I am struggling to find a neat, quick way of doing it. I want to create a sproc that takes an Srn and returns back all the staff under that Srn in the structure. If there is a score for QuestionId of 16 then that indicates a completed survey. I would like to return a line for the Srn entered (The top manager) with a count of completed surveys for the direct reports under that manager. Under that I would like each manager under the original manager with a count of completed surveys for each of their direct reports and so on. I would like to see the data as such below when I set the top manager to be Joe (ABC2). UserName | Completed | Total ============================ Joe | 2 | 2 Paul | 1 | 2 David | 0 | 2 TOTAL | 3 | 6

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• What is the difference between an Abstract Syntax Tree and a Concrete Syntax Tree?

  - by Jason Baker

  I've been reading a bit about how interpreters/compilers work, and one area where I'm getting confused is the difference between an AST and a CST. My understanding is that the parser makes a CST, hands it to the semantic analyzer which turns it into an AST. However, my understanding is that the semantic analyzer simply ensures that rules are followed. I don't really understand why it would actually make any changes to make it abstract rather than concrete. Is there something that I'm missing about the semantic analyzer, or is the difference between an AST and CST somewhat artificial?

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• Programmer productivity by programming language?

  - by Jason Baker

  In code complete, there's a nice table listing how productive a programmer is depending on language. Jeff Atwood has a nice blog post about it. This chart is at least 4 years old by now. I'm curious: have there been any more recent studies done on this? (insert standard anti-flamewar boilerplate here... we're all adults) Update: I appreciate everyone's opinions on the subject and whether or not this is a relevant question or not. But that's not really what I'm asking for. I'm wanting any studies on the subject. I'm inclined to agree with most of the opinions posted thus far, but I'd like to see if there's any research to back that up. And I'm also aware that choice of programming language is a complicated subject that depends on other factors like developer familiarity. To me, this is all the more reason to have these kinds of discussions backed by research. Also, thanks for the link, Robert Gamble.

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• Best way to learn SQL Server

  - by Jason Baker

  So I'm getting a new job working with databases (Microsoft SQL Server to be precise). I know nothing about SQL much less SQL Server. They said they'd train me, but I want to take some initiative to learn about it on my own to be ahead. Where's the best place to start (tutorials, books, etc)? I want to learn more about the SQL language moreso than any of the fancy point and click stuff.

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• What's the best C++ JSON parser?

  - by Sam Baker

  I've seen the C++ JSON links on www.json.org but would like some feedback on which parser people prefer - for reliability, speed and ease of use. Thanks, Sam

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• Where's the Win32 resource for the mouse cursor for dragging splitters?

  - by Luther Baker

  I am building a custom win32 control/widget and would like to change the cursor to a horizontal "splitter" symbol when hovering over a particular vertical line in the control. IE: I want to drag this vertical line (splitter bar) left and right (WEST and EAST). Of the the system cursors (OCR_*), the only cursor that makes sense is the OCR_SIZEWE. Unfortunately, that is the big, awkward cursor the system uses when resizing a window. Instead, I am looking for the cursor that is about 20 pixels tall and around 3 or 4 pixel wide with two small arrows pointing left and right. I can easily draw this and include it as a resource in my application but the cursor itself is so prevalent that I wanted to be sure it wasn't missing something. For example: when you use the COM drag and drop mechanism (CLSID_DragDropHelper, IDropTarget, etc) you implicitly have access to the "drag" icon (little box under the pointer). I didn't see an explicit OCR_* constant for this guy ... so likewise, if I can't find this splitter cursor outright, I am wondering if it is part of a COM object or something else in the win32 lib.

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• Can MFMailComposeViewController attach an XML doc to an HTML message?

  - by Luther Baker

  I am creating an email in MFMaiilComposeViewController and if I simply create some html snippets and assign them to the message body - all is well. The resulting email (in GMail and Yahoo) looks like the original HTML I sent. [mailMan_ setMessageBody:body isHTML:YES]; On the other hand, if I also include an XML attachment, my email reader renders everything as plain text … including, the XML inlined. IE: my mail client (GMail, Yahoo) shows the raw HTHML and XML tags - including html tags that I didn't supply - ie: the html, head, body tags the iPhone provides around the content: NSData *opmlData = [[NSData alloc] initWithData:[opml dataUsingEncoding:NSUTF8StringEncoding]]; NSString *fileName = [NSString stringWithFormat:@"%f.opml", [NSDate timeIntervalSinceReferenceDate]]; [mailMan_ addAttachmentData:opmlData mimeType:@"text/xml" fileName:fileName]; I pop3'd the mails to see what was happening and found that WITHOUT an attachment, the resulting html section of the email contains this block: --0-1682099714-1273329398=:59784 Content-Type: text/html; charset=us-ascii <html><body bgcolor="#FFFFFF"><div><h2 style="b while on the other hand, WITH the XML attachment, the iPhone is sending this: --0-881105825-1273328091=:50337 Content-Type: text/plain; charset=us-ascii <html><body bgcolor="#FFFFFF"><div><h2 style="bac Notice the difference? Look at the Content-Type … text/html vs text/plain. It looks like when I include an XML attachment, the iPhone is errantly tagging the HTML version of the body as plain text! Just to clarify, technically, both with and without the attachment, the iPhone also includes this: --0-881105825-1273328091=:50337 Content-Type: text/plain; charset=us-ascii Notebook Carpentry Bathroom floor tile Bathroom wall tile Scrape thinset But this obviously isn't where the problem lies. Am I doing something wrong? What must I do to actually "attach" XML without the iPhone labeling the entire HTML body as plain text. I tried reversing the assignments (attachment first and then body) but no luck. For what it's worth, the email looks perfect from the iPhone's sending interface. Indeed, the HTML renders correctly and the attachment looks like a little icon at the bottom of the message. This problem has more to do with what the iPhone is actually sending.

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• Why is Oracle using a skip scan for this query?

  - by Jason Baker

  Here's the tkprof output for a query that's running extremely slowly (WARNING: it's long :-) ): SELECT mbr_comment_idn, mbr_crt_dt, mbr_data_source, mbr_dol_bl_rmo_ind, mbr_dxcg_ctl_member, mbr_employment_start_dt, mbr_employment_term_dt, mbr_entity_active, mbr_ethnicity_idn, mbr_general_health_status_code, mbr_hand_dominant_code, mbr_hgt_feet, mbr_hgt_inches, mbr_highest_edu_level, mbr_insd_addr_idn, mbr_insd_alt_id, mbr_insd_name, mbr_insd_ssn_tin, mbr_is_smoker, mbr_is_vip, mbr_lmbr_first_name, mbr_lmbr_last_name, mbr_marital_status_cd, mbr_mbr_birth_dt, mbr_mbr_death_dt, mbr_mbr_expired, mbr_mbr_first_name, mbr_mbr_gender_cd, mbr_mbr_idn, mbr_mbr_ins_type, mbr_mbr_isreadonly, mbr_mbr_last_name, mbr_mbr_middle_name, mbr_mbr_name, mbr_mbr_status_idn, mbr_mpi_id, mbr_preferred_am_pm, mbr_preferred_time, mbr_prv_innetwork, mbr_rep_addr_idn, mbr_rep_name, mbr_rp_mbr_id, mbr_same_mbr_ins, mbr_special_needs_cd, mbr_timezone, mbr_upd_dt, mbr_user_idn, mbr_wgt, mbr_work_status_idn FROM (SELECT /*+ FIRST_ROWS(1) */ mbr_comment_idn, mbr_crt_dt, mbr_data_source, mbr_dol_bl_rmo_ind, mbr_dxcg_ctl_member, mbr_employment_start_dt, mbr_employment_term_dt, mbr_entity_active, mbr_ethnicity_idn, mbr_general_health_status_code, mbr_hand_dominant_code, mbr_hgt_feet, mbr_hgt_inches, mbr_highest_edu_level, mbr_insd_addr_idn, mbr_insd_alt_id, mbr_insd_name, mbr_insd_ssn_tin, mbr_is_smoker, mbr_is_vip, mbr_lmbr_first_name, mbr_lmbr_last_name, mbr_marital_status_cd, mbr_mbr_birth_dt, mbr_mbr_death_dt, mbr_mbr_expired, mbr_mbr_first_name, mbr_mbr_gender_cd, mbr_mbr_idn, mbr_mbr_ins_type, mbr_mbr_isreadonly, mbr_mbr_last_name, mbr_mbr_middle_name, mbr_mbr_name, mbr_mbr_status_idn, mbr_mpi_id, mbr_preferred_am_pm, mbr_preferred_time, mbr_prv_innetwork, mbr_rep_addr_idn, mbr_rep_name, mbr_rp_mbr_id, mbr_same_mbr_ins, mbr_special_needs_cd, mbr_timezone, mbr_upd_dt, mbr_user_idn, mbr_wgt, mbr_work_status_idn, ROWNUM AS ora_rn FROM (SELECT mbr.comment_idn AS mbr_comment_idn, mbr.crt_dt AS mbr_crt_dt, mbr.data_source AS mbr_data_source, mbr.dol_bl_rmo_ind AS mbr_dol_bl_rmo_ind, mbr.dxcg_ctl_member AS mbr_dxcg_ctl_member, mbr.employment_start_dt AS mbr_employment_start_dt, mbr.employment_term_dt AS mbr_employment_term_dt, mbr.entity_active AS mbr_entity_active, mbr.ethnicity_idn AS mbr_ethnicity_idn, mbr.general_health_status_code AS mbr_general_health_status_code, mbr.hand_dominant_code AS mbr_hand_dominant_code, mbr.hgt_feet AS mbr_hgt_feet, mbr.hgt_inches AS mbr_hgt_inches, mbr.highest_edu_level AS mbr_highest_edu_level, mbr.insd_addr_idn AS mbr_insd_addr_idn, mbr.insd_alt_id AS mbr_insd_alt_id, mbr.insd_name AS mbr_insd_name, mbr.insd_ssn_tin AS mbr_insd_ssn_tin, mbr.is_smoker AS mbr_is_smoker, mbr.is_vip AS mbr_is_vip, mbr.lmbr_first_name AS mbr_lmbr_first_name, mbr.lmbr_last_name AS mbr_lmbr_last_name, mbr.marital_status_cd AS mbr_marital_status_cd, mbr.mbr_birth_dt AS mbr_mbr_birth_dt, mbr.mbr_death_dt AS mbr_mbr_death_dt, mbr.mbr_expired AS mbr_mbr_expired, mbr.mbr_first_name AS mbr_mbr_first_name, mbr.mbr_gender_cd AS mbr_mbr_gender_cd, mbr.mbr_idn AS mbr_mbr_idn, mbr.mbr_ins_type AS mbr_mbr_ins_type, mbr.mbr_isreadonly AS mbr_mbr_isreadonly, mbr.mbr_last_name AS mbr_mbr_last_name, mbr.mbr_middle_name AS mbr_mbr_middle_name, mbr.mbr_name AS mbr_mbr_name, mbr.mbr_status_idn AS mbr_mbr_status_idn, mbr.mpi_id AS mbr_mpi_id, mbr.preferred_am_pm AS mbr_preferred_am_pm, mbr.preferred_time AS mbr_preferred_time, mbr.prv_innetwork AS mbr_prv_innetwork, mbr.rep_addr_idn AS mbr_rep_addr_idn, mbr.rep_name AS mbr_rep_name, mbr.rp_mbr_id AS mbr_rp_mbr_id, mbr.same_mbr_ins AS mbr_same_mbr_ins, mbr.special_needs_cd AS mbr_special_needs_cd, mbr.timezone AS mbr_timezone, mbr.upd_dt AS mbr_upd_dt, mbr.user_idn AS mbr_user_idn, mbr.wgt AS mbr_wgt, mbr.work_status_idn AS mbr_work_status_idn FROM mbr JOIN mbr_identfn ON mbr.mbr_idn = mbr_identfn.mbr_idn WHERE mbr_identfn.mbr_idn = mbr.mbr_idn AND mbr_identfn.identfd_type = :identfd_type_1 AND mbr_identfn.identfd_number = :identfd_number_1 AND mbr_identfn.entity_active = :entity_active_1) WHERE ROWNUM <= :ROWNUM_1) WHERE ora_rn > :ora_rn_1 call count cpu elapsed disk query current rows ------- ------ -------- ---------- ---------- ---------- ---------- ---------- Parse 9936 0.46 0.49 0 0 0 0 Execute 9936 0.60 0.59 0 0 0 0 Fetch 9936 329.87 404.00 0 136966922 0 0 ------- ------ -------- ---------- ---------- ---------- ---------- ---------- total 29808 330.94 405.09 0 136966922 0 0 Misses in library cache during parse: 0 Optimizer mode: FIRST_ROWS Parsing user id: 36 (JIVA_DEV) Rows Row Source Operation ------- --------------------------------------------------- 0 VIEW (cr=102 pr=0 pw=0 time=2180 us) 0 COUNT STOPKEY (cr=102 pr=0 pw=0 time=2163 us) 0 NESTED LOOPS (cr=102 pr=0 pw=0 time=2152 us) 0 INDEX SKIP SCAN IDX_MBR_IDENTFN (cr=102 pr=0 pw=0 time=2140 us)(object id 341053) 0 TABLE ACCESS BY INDEX ROWID MBR (cr=0 pr=0 pw=0 time=0 us) 0 INDEX UNIQUE SCAN PK_CLAIMANT (cr=0 pr=0 pw=0 time=0 us)(object id 334044) Rows Execution Plan ------- --------------------------------------------------- 0 SELECT STATEMENT MODE: HINT: FIRST_ROWS 0 VIEW 0 COUNT (STOPKEY) 0 NESTED LOOPS 0 INDEX MODE: ANALYZED (SKIP SCAN) OF 'IDX_MBR_IDENTFN' (INDEX (UNIQUE)) 0 TABLE ACCESS MODE: ANALYZED (BY INDEX ROWID) OF 'MBR' (TABLE) 0 INDEX MODE: ANALYZED (UNIQUE SCAN) OF 'PK_CLAIMANT' (INDEX (UNIQUE)) ******************************************************************************** Based on my reading of Oracle's documentation of skip scans, a skip scan is most useful when the first column of an index has a low number of unique values. The thing is that the first index of this column is a unique primary key. So am I correct in assuming that a skip scan is the wrong thing to do here? Also, what kind of scan should it be doing? Should I do some more hinting for this query? EDIT: I should also point out that the query's where clause uses the columns in IDX_MBR_IDENTFN and no columns other than what's in that index. So as far as I can tell, I'm not skipping any columns.

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• Significant figures in the decimal module

  - by Jason Baker

  So I've decided to try to solve my physics homework by writing some python scripts to solve problems for me. One problem that I'm running into is that significant figures don't always seem to come out properly. For example this handles significant figures properly: from decimal import Decimal >>> Decimal('1.0') + Decimal('2.0') Decimal("3.0") But this doesn't: >>> Decimal('1.00') / Decimal('3.00') Decimal("0.3333333333333333333333333333") So two questions: Am I right that this isn't the expected amount of significant digits, or do I need to brush up on significant digit math? Is there any way to do this without having to set the decimal precision manually? Granted, I'm sure I can use numpy to do this, but I just want to know if there's a way to do this with the decimal module out of curiosity.

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• (partial apply str) and apply-str in clojure's ->

  - by Jason Baker

  If I do the following: user=> (-> ["1" "2"] (partial apply str)) #<core$partial__5034$fn__5040 clojure.core$partial__5034$fn__5040@d4dd758> ...I get a partial function back. However, if I bind it to a variable: user=> (def apply-str (partial apply str)) #'user/apply-str user=> (-> ["1" "2" "3"] apply-str) "123" ...the code works as I intended it. I would assume that they are the same thing, but apparently that isn't the case. Can someone explain why this is to me?

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• When should I use git pull --rebase?

  - by Jason Baker

  I know of some people who use git pull --rebase by default and others who insist never to use it. I believe I understand the difference between merging and rebasing, but I'm trying to put this in the context of git pull. Is it just about not wanting to see lots of merge commit messages? Or are there other issues?

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