How To have Dynamic SQL in MySQL Stored Procedure

How To have Dynamic SQL in MySQL Stored Procedure

How do you build and use dynamic sql in a MySQL stored procedure? 1:I don't believe MySQL supports dynamic sql. You can do "prepared" statements which is similar, but different.Here is an example:mysql> PREPARE stmt FROM -> 'select

Immutability of Strings in Java

Immutability of Strings in Java

Consider the following example.String str = new String();str = "Hello";System.out.println(str); //Prints Hellostr = "Help!";System.out.println(str); //Prints Help!Now, in Java, String objects are immutable. Then how come the object str c

How to apply bindValue method in LIMIT clause?

How to apply bindValue method in LIMIT clause?

Here is a snapshot of my code:$fetchPictures = $PDO->prepare("SELECT * FROM pictures WHERE album = :albumId ORDER BY id ASC LIMIT :skip, :max");$fetchPictures->bindValue(':albumId', $_GET['albumid'], PDO::PARAM_INT);if(isset

Strings don't seem to be equal in Java on Android, even though they print the same

Strings don't seem to be equal in Java on Android, even though they print the same

I've got a problem that I'm rather confused about. I have the following lines of code in my android application:System.out.println(CurrentNode.getNodeName().toString());if (CurrentNode.getNodeName().toString() == "start") { System.out.pr

Hibernate: Dirty Checking and Only Update of Dirty Attributes?

Hibernate: Dirty Checking and Only Update of Dirty Attributes?

In the "good old JDBC days" I wrote a lot of SQL code that did very targeted updates of only the "attributes/members" that were actually changed:For example, consider an object with the following members:public String name;public String add

Making gulp write files synchronously before moving on to the next task

Making gulp write files synchronously before moving on to the next task

gulpfile.jsgulp.task('browser-bundle', ['react'], function() {...});gulp.task('react', function(){ gulp.src(options.JSX_SOURCE) .pipe(react()) .pipe(gulp.dest(options.JSX_DEST))});As you can see I have the browser-bundle task dep

Rails database boolean values

Rails database boolean values

Code first:create_table :users do |t| ... t.boolean :is_active, :default => true ...endNow, here is my issue - I am creating a rake task to import a LARGE number of records (10,000+). I've done extensive testing and benchmarking and dete

In python, if a function doesn't have a return statement, what does it return?

In python, if a function doesn't have a return statement, what does it return?

Given this example function:def writeFile(listLine,fileName): '''put a list of str-line into a file named fileName''' with open(fileName,'a',encoding = 'utf-8') as f: for line in listLine: f.writelines(line+'\r\n')

Cannot insert the value NULL into column in ASP.NET MVC Entity Framework

Cannot insert the value NULL into column in ASP.NET MVC Entity Framework

When trying to use this code:var model = new MasterEntities();var customer = new Customers();customer.Sessionid = 25641;model.Customers.Add(customer);model.SaveChanges();I get: {"Cannot insert the value NULL into column 'Sessionid', table

Cannot Insert Unicode Using cx-Oracle

Cannot Insert Unicode Using cx-Oracle

I am having an issue inserting unicode into an Oracle schema, I think the database is an Oracle 11g instance but am not certain at this point. I'm using python 2.6.1 on OS X 10.6.8 (this is the system verison of python) and am using the cx-

PHP IF statement for Boolean values: $var === true vs $var

PHP IF statement for Boolean values: $var === true vs $var

I know this question is not really important.. however I've been wondering:Which of the following IF statements is the best and fastest to use?I know === is to match exactly the boolean value. However is there really any improvement? 1:U

Memory / heap management across DLLs

Memory / heap management across DLLs

Although it seems to be a very common issue, I did not harvest much information: How can I create a safe interface between DLL boundaries regarding memory alloction?It is quite well-known that // in DLL aDLLEXPORT MyObject* getObject() { re

Auto-generate an interface implementation in C#?

Auto-generate an interface implementation in C#?

I know this is quite lazy but, is there any way on Visual C# 2010 Express to auto-generate an interface implementation? (I don't mean at runtime but at design time, like a code snippet). Perhaps with a third party utility? 1:I'm not fami

Django check if object in ManyToMany field

Django check if object in ManyToMany field

I have quite a simple problem to solve. I have Partner model which has >= 0 Users associated with it:class Partner(models.Model): name = models.CharField(db_index=True, max_length=255) slug = models.SlugField(db_index=True) user =

SQL Server: IF EXISTS ; ELSE

SQL Server: IF EXISTS ; ELSE

I have a tableA:ID value 1 100 2 101 2 444 3 501Also TableB ID Code12Now I want to populate col = code of table B if there exists ID = 2 in tableA. for multiple values , get max value.else populate it with '123'. Now here is what I used

Doctrine DQL conditional query

Doctrine DQL conditional query

I'm trying to build a dynamic query with Doctrine's query builder. Let's say I'd also like to optionally select an end time in the following (only if one was entered). How would I add this conditionally to the statement? $query = $this->

Find the time difference between two consecutive rows in the same table in sql

Find the time difference between two consecutive rows in the same table in sql

I'm stuck. I've looked for an answer, but can't seem to find subtracting time in the same table from two different rows of the same table that fits. I'm having a difficult time with the following query. In the table below, I want to differe

MYSQL: Sequential Number Table

MYSQL: Sequential Number Table

I am trying to get a sequential number table from 1 to 20 million. (or 0 to 20 million)I am rather awestruck at how difficult it's been to get a MySQL-compatible solution to this common problem.Similar to this: Creating a "Numbers Table" i

Replace string in a specific line using python

Replace string in a specific line using python

I'm writing a python script to replace strings from a each text file in a directory with a specific extension (.seq). The strings replaced should only be from the second line of each file, and the output is a new subdirectory (call it clean

except-clause deletes local variable

except-clause deletes local variable

exc = Nonetry: raise Exceptionexcept Exception as exc: pass# ...print(exc) NameError: name 'exc' is not definedThis used to work in Python2. Why was it changed this way? If I could at least re-assign to exc, similar to class-level at

How to Access ViewData in javascript

How to Access ViewData in javascript

I am having a problem accessing the ViewData object through javascript. I have set the ViewData object on the controller and on document.ready event of the view i am trying to see the contents of that same ViewData object like so: var

Mysql transaction : commit and rollback

Mysql transaction : commit and rollback

I updated my PhpMyAdmin database engine from MyISAM to INNODB to allow rollback.This is my SQL query : START TRANSACTION;UPDATE jkm_content SET state=0 WHERE title IN ('title-1','title2');And the result : start transaction;# MySQL returned

different between @Model and @model

different between @Model and @model

Basically I'm doing a test caused by one of excpetion.By using return View(list_a) in controller I passed a list into my view, On my View page, the code is like:@{ ViewBag.Title = "KYC_Home";}@using UniBlue.Models;@model UniBlue.Models.K

JavaFX custom control (TextField) not working

JavaFX custom control (TextField) not working

I am trying to make a custom control with JavaFX and SceneBuilder 1.1.I have this code:FXML CustomComponent.javapackage libreria.javaFX.componentes.componenteTextField;import javafx.scene.control.TextField;public class CustomComponen

Random() in sqlite and Android sdk

Random() in sqlite and Android sdk

I want to extract random rows from the app sqlite database in Android. I'm aware that, with sqlite, you can select random rows with:SELECT * FROM table ORDER BY RANDOM() LIMIT 1;In the app, I have something like thisreturn mDb.query(TABLE,