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how to emulate “insert ignore” and “on duplicate key update” (sql merge) with postgresql?
...If it doesn't modify any row that means it didn't exist, so do an insert. Obviously, you do this inside a transaction.
You can of course wrap this in a function if you don't want to put the extra code on the client side. You also need a loop for the very rare race condition in that thinking.
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Useful GCC flags for C
Beyond setting -Wall , and setting -std=XXX , what other really useful, but less known compiler flags are there for use in C?
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What's the most elegant way to cap a number to a segment? [closed]
Let's say x , a and b are numbers. I need to cap x to the bounds of the segment [a, b] .
10 Answers
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mysql update column with value from another table
I have two tables, both looking like
8 Answers
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Need a simple explanation of the inject method
I'm looking at this code but my brain is not registering how the number 10 can become the result. Would someone mind explaining what's happening here?
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Pretty printing XML in Python
...dom
dom = xml.dom.minidom.parse(xml_fname) # or xml.dom.minidom.parseString(xml_string)
pretty_xml_as_string = dom.toprettyxml()
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How can I configure the font size for the tree item in the package explorer in Eclipse?
How can I configure the font size for the tree item in the package explorer/outline in Eclipse?
23 Answers
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Cloning a private Github repo
I have a private repository on Github for a project I'm working on. Until now I had only worked on my home desktop, but I just bought a laptop, and am trying to set it up so that I can work on the project from either computer, and push / pull changes.
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method overloading vs optional parameter in C# 4.0 [duplicate]
which one is better? at a glance optional parameter seems better (less code, less XML documentation, etc), but why do most MSDN library classes use overloading instead of optional parameters?
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Adding 'serial' to existing column in Postgres
I have a small table (~30 rows) in my Postgres 9.0 database with an integer ID field (the primary key) which currently contains unique sequential integers starting at 1, but which was not created using the 'serial' keyword.
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