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What are the options for storing hierarchical data in a relational database? [closed]
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Columns: one for each lineage level, refers to all the parents up to the root, levels below the current items' level are set to 0 (or NULL)
There is a fixed limit to how deep the hierarchy can be
Cheap ancestors, descendants, level
Cheap insert, delete, move of the leaves
Expensive insert, delete,...
How to generate .NET 4.0 classes from xsd?
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2.
Within “XML Schema Explorer” scroll all the way down to find the root/data node. Right click on root/data node and it will show “Generate Sample XML”. If it does not show, it means you are not on the data element node but you are on any of the data definition node.
Copy your genera...
Django: How to manage development and production settings?
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MIDDLEWARE = [...]
TEMPLATES = [{...}]
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STATIC_URL = '/static/'
STATIC_ROOT = os.path.join(BASE_DIR, 'staticfiles')
MEDIA_ROOT = os.path.join(BASE_DIR, '/path/')
MEDIA_URL = '/path/'
Open dev.py and include that stuff which is development specific for example:
dev.py:
DEBUG = True
ALLOWED_HOST...
Timeout expired. The timeout period elapsed prior to completion of the operation or the server is no
...uts or the connection pool size. You'll need to dive in and figure out the root cause. If you need help resolving that root cause you can post your own question.
– Marnix van Valen
Jul 28 '14 at 6:36
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GCM with PHP (Google Cloud Messaging)
...CM
Android Push Notifications using Google Cloud Messaging (GCM), PHP and MySQL
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Why should you use an ORM? [closed]
...that the use-case is fairly limited. I have never really used anything but MySql and sqlite for about a decade. I think it's probably a very rare requirement for most developers.
– troelskn
Dec 29 '09 at 12:44
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How to install packages offline?
...7:10 Jinja2-2.6.tar.gz
-rw-r--r-- 1 pavel staff 70305 Apr 11 00:28 MySQL-python-1.2.3.tar.gz
-rw-r--r-- 1 pavel staff 2597214 Apr 10 18:26 SQLAlchemy-0.7.6.tar.gz
-rw-r--r-- 1 pavel staff 1108056 Feb 22 17:10 Werkzeug-0.8.2.tar.gz
-rw-r--r-- 1 pavel staff 488207 Apr 10 18:...
Doctrine and composite unique keys
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git rebase without changing commit timestamps
...so work with:
interactive rebase (rebase -i/rebase --interactive)
for the root commit (git rebase --root)
See "Change timestamps while rebasing git branch".
(Original answer, June 2012)
You could try, for a non-interactive rebase
(see just above: with Git 2.29, Q4 2020, that will work with an int...
How many threads can a Java VM support?
...ogram which spawns 25,000 threads and all those threads write some data in MySql database at regular interval of 2 seconds.
I ran this program with 10,000 threads for 30 minutes continuously then also my system was stable and I was able to do other normal operations like browsing, opening, closing...