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创建增量同步Oracle物化视图问题 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...个表上建立物化视图日志如“CREATE MATERIALIZED VIEW LOG ON T_tablename;”，再到数据库B上创建数据库链接和快速刷新的物化视图如“create materialized view mv_tablename refresh fast on demand start with sysdate next sysdate+1/288 as select * from T_tablename@dblink_...
SQLite UPSERT / UPDATE OR INSERT
... there are two ways to accomplish this, depending on the structure of your table and if you have foreign keys restrictions activated to maintain integrity. I'd like to share this in a clean format to save some time to the people that may be in my situation.
Option 1: You can afford deleting the row...
CMake使用教程 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ab/testngpp/cmake-2.8.1/Tests/Tutorial/Step1/build3>make
Linking CXX executable Tutorial.exe
[100%] Built target Tutorial
可以运行一下Turorial.exe：
D:/Projects/Lab/testngpp/cmake-2.8.1/Tests/Tutorial/Step1/build3>Tutorial.exe
Tutorial.exe Version 1.0
Usage: Tutorial.exe number
D:/Pr...
mmap() vs. reading blocks
...r random access, especially if your access patterns are sparse and unpredictable.
Memory maps allow you to keep using pages from the cache until you are done. This means that if you use a file heavily for a long period of time, then close it and reopen it, the pages will still be cached. With read...
Is std::unique_ptr required to know the full definition of T?
... compiler will tell you.
However, in case it is helpful to you, here is a table which documents several members of shared_ptr and unique_ptr with respect to completeness requirements. If the member requires a complete type, then entry has a "C", otherwise the table entry is filled with "I".
Comple...
NSDefaultRunLoopMode vs NSRunLoopCommonModes
... in different modes. A "run loop mode" is a convention used by the OS to establish some rules for when to deliver certain events or collect them to be delivered later.
Usually all run loops are set to the "default mode" which establishes a default way to manage input events. For example: as soon as...
How to move child element from one parent to another using jQuery [duplicate]
I am using the jQuery DataTables plugin. I would like to move the search box (.dataTables_filter) and number of records to display dropdown (.dataTables_length) from their parent element (.dataTables_wrapper) to another div on my page without losing any registered javascript behavior. For instance...
Nearest neighbors in high-dimensional data?
...set of points in a high-dimensional space into a set of bins, i.e., a hash table [1][3]. But unlike traditional hashes, a locality-sensitive hash places nearby points into the same bin.
LSH has some huge advantages. First, it is simple. You just compute the hash for all points in your database, the...
How to read data from a zip file without having to unzip the entire file
...can also extract to a file or other destinations).
Reading the zip file's table of contents is as easy as:
using (ZipFile zip = ZipFile.Read(ExistingZipFile))
{
foreach (ZipEntry e in zip)
{
if (header)
{
System.Console.WriteLine("Zipfile: {0}", zip.Name);
if ((zip.Comment ...
Static extension methods [duplicate]
....Parse(..)
vs.
Helper.ParseBool(..);
Doesn't really bring much to the table...
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