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How to add column if not exists on PostgreSQL?
...col, _type);
RETURN TRUE;
END IF;
END
$func$ LANGUAGE plpgsql;
Call:
SELECT f_add_col('public.kat', 'pfad1', 'int');
Returns TRUE on success, else FALSE (column already exists).
Raises an exception for invalid table or type name.
Why another version?
This could be done with a DO st...
How/When does Execute Shell mark a build as failure in Jenkins?
...ke it what it is. You might as well have a cron or an SVN post-commit hook call the script directly. Jenkins performing the SVN checkout itself is crucial. It allows the builds to be triggered only when there are changes (or on timer, or manual, if you prefer). It keeps track of changes between buil...
Java multiline string
...
Furthermore, the first version will be automatically concatenated by the compiler, since all the strings are known at compile time. Even if the strings are not known at compile time, it's no slower than StringBuilder or String.format(). The only reason to avoid concatenat...
What's an Aggregate Root?
... repository.
The repository encapsulates access to child objects - from a caller's perspective it automatically loads them, either at the same time the root is loaded or when they're actually needed (as with lazy loading).
For example, you might have an Order object which encapsulates operations o...
How to get a reversed list view on a list in Java?
...e a reversed list view on a list (in a similar way than List#sublist provides a sublist view on a list). Is there some function which provides this functionality?
...
Python, Unicode, and the Windows console
...hat's the best way around this? Is there any way I can make Python automatically print a ? instead of failing in this situation?
...
C# How can I check if a URL exists/is valid?
...an issue with this code, or just a fact of life when making these kinds of calls?
– ssmith
Nov 10 '10 at 15:05
@ssmith...
Why doesn't requests.get() return? What is the default timeout that requests.get() uses?
...t; requests.get('http://github.com', timeout=0.001)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
requests.exceptions.Timeout: HTTPConnectionPool(host='github.com', port=80): Request timed out. (timeout=0.001)
Note:
timeout is not a time limit on the...
Should a retrieval method return 'null' or throw an exception when it can't produce the return value
...e in regards to something like a repository pattern for example. Is it typically considered exceptional for an object not to exist given a primary key? Yes, that is something his domain will determine, but what do most experts with years of experience suggest? That's the type of answer we should see...
Get type of a generic parameter in Java with reflection
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You can call m.getParameterTypes() to get all the actual types. It would return "List" for the example.
– Lee Meador
Mar 4 '16 at 1:40
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