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Specifying column name in a “references” migration
I want to make a migration in Rails, referencing another table. Usually, I would do something like:
6 Answers
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What's wrong with foreign keys?
...s
you can get nice "on delete cascade" behavior, automatically cleaning up tables
knowing about the relationships between tables in the database helps the Optimizer plan your queries for most efficient execution, since it is able to get better estimates on join cardinality.
FKs give a pretty big hi...
Adding iOS UITableView HeaderView (not section header)
I want to add a table header (not section headers) like in the contacts app for example:
5 Answers
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What is the curiously recurring template pattern (CRTP)?
...phism(which like dynamic polymorphism but without virtual function pointer table).
#pragma once
#include <iostream>
template <typename T>
class Base
{
public:
void method() {
static_cast<T*>(this)->method();
}
};
class Derived1 : public Base<...
How do I find a specific table in my EDMX model quickly?
I was wondering if anyone knows a quicker way to find a table in the EDMX model than just scrolling through the diagram and looking for the thing. Our database has around 50 tables in it and when I'm looking for a specific one it's just a chore to see where VS put the thing.
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Why malloc+memset is slower than calloc?
...n parts here: your program, the standard library, the kernel, and the page tables. You already know your program, so...
Memory allocators like malloc() and calloc() are mostly there to take small allocations (anything from 1 byte to 100s of KB) and group them into larger pools of memory. For exam...
String literals and escape characters in postgresql
Attempting to insert an escape character into a table results in a warning.
5 Answers
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Caching a jquery ajax response in javascript/browser
...onsole for debugging.
You can clear the cache on any given page via
jSQL.tables = {}; jSQL.persist();
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SQL - find records from one table which don't exist in another
I've got the following two SQL tables (in MySQL):
8 Answers
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It has a DefiningQuery but no InsertFunction element… err
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Well when a table is encountered without a PrimaryKey it is treated as a View.
And views show up in the EDMX file (open in an XML editor to see) in the StorageModel\EntitySet[n]\DefiningQuery element.
When you have a DefiningQuery the ...