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Is it possible to roll back CREATE TABLE and ALTER TABLE statements in major SQL databases?
...resql.org/wiki/Transactional_DDL_in_PostgreSQL:_A_Competitive_Analysis provides an overview of this issue from PostgreSQL's perspective.
Is DDL transactional according to this document?
PostgreSQL - yes
MySQL - no; DDL causes an implicit commit
Oracle Database 11g Release 2 and above - by default...
How can I decompress a gzip stream with zlib?
...
Perhaps you can provide some guidelines for iterative decompression of gzip stream. In one-shot gzip decompression where your output stream and size should be fixed and sufficient for storing the whole decompressed output. This value depends on ...
Are multiple `.gitignore`s frowned on?
...
Sure, if you don’t mind the fiddliness of having to open a file in a location somewhere off the repository root, then writing a whole path into it, and then remembering to clean up the entry if/when you delete the directory. Compare that with printf \* &...
How can I push a local Git branch to a remote with a different name easily?
...tup "pushRemote" needs to be set after this.
– wheredidthatnamecomefrom
Mar 14 '18 at 21:12
I don't think git branch -...
How to return smart pointers (shared_ptr), by reference or by value?
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Return smart pointers by value.
As you've said, if you return it by reference, you won't properly increment the reference count, which opens up the risk of deleting something at the improper time. That alone should be enough reason to not return by reference. Interface...
What's the difference between hard and soft floating point numbers?
...rollers don't have floating-point hardware. In that case you may either avoid using floating point (usually the best option) or rely on an implementation in software, which will be part of the C library.
In some families of controllers, for example ARM, the floating-point hardware is present in som...
When should I use GC.SuppressFinalize()?
...age Collector (GC) that this object was cleaned up fully.
The recommended IDisposable pattern when you have a finalizer is:
public class MyClass : IDisposable
{
private bool disposed = false;
protected virtual void Dispose(bool disposing)
{
if (!disposed)
{
...
What is the difference between “Rollback…” and “Back Out Submitted Changelist #####” in Perforce P4V
...stored to the state they were in before you submitted that changelist, provided no changes have been made to those files since. If subsequent changes have been made to any of those files, Perforce will tell you that those files are now out of date. You will have to sync to the head revision and th...
Script parameters in Bash
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The arguments that you provide to a bashscript will appear in the variables $1 and $2 and $3 where the number refers to the argument. $0 is the command itself.
The arguments are seperated by spaces, so if you would provide the -from and -to in the com...
How do I change bash history completion to complete what's already on the line?
...nothing and putting it in .bashrc stop the arrows from doing anything. Any ideas?
– blokkie
Jun 23 '09 at 1:31
Never m...