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SQL Server - stop or break execution of a SQL script
...SERROR to actually stop the script. E.g.,
:on error exit
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[SOMETABLE]') AND type in (N'U'))
RaisError ('This is not a Valid Instance Database', 15, 10)
GO
print 'Keep Working'
will output:
Msg 50000, Level 15, St...
Undoing a commit in TortoiseSVN
...
Go to Show Log Screen, select the revision that you want to undo, right click it and select Revert changes from this revision, this will do a reverse-merge.
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How to clear MemoryCache?
...od
The workaround is:
List<string> cacheKeys = MemoryCache.Default.Select(kvp => kvp.Key).ToList();
foreach (string cacheKey in cacheKeys)
{
MemoryCache.Default.Remove(cacheKey);
}
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How to find the key of the largest value hash?
...
You can use the select method if you want the key value pair returned:
hash.select {|k,v| v == hash.values.max }
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improve this ans...
How to remove a TFS Workspace Mapping?
...ping is stored in tbl_WorkingFolder.LocalItem.
/*Find correct workspace*/
SELECT WorkspaceId, *
FROM tbl_Workspace
ORDER BY WorkspaceName
/*View the existing mapping*/
SELECT LocalItem, *
FROM tbl_WorkingFolder
WHERE WorkspaceId = <<WorkspaceId from above>>
/*Update mapping*/
UPDATE t...
内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...
... 总共32个vcpu。 16个table，每个5M row。
OLTP_RO测试包含5个select查询：select_ranges, select_order_ranges, select_distinct_ranges, select_sum_ranges,
可以看到在多核心或者多线程的场景下， jemalloc和tcmalloc带来的tps增加非常明显。
参考资料
glibc...
How do you perform a left outer join using linq extension methods
...=> bar.Foo_Id,
(x,y) => new { Foo = x, Bars = y })
.SelectMany(
x => x.Bars.DefaultIfEmpty(),
(x,y) => new { Foo=x.Foo, Bar=y});
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improve t...
How to elegantly ignore some return values of a MATLAB function?
...
You can make a function (or anonymous function) that only returns selected outputs, e.g.
select = @(a,b) a(b);
Then you can call
How to disable copy/paste from/to EditText
...y,paste,cut and custom context menus from appearing by.
edittext.setCustomSelectionActionModeCallback(new ActionMode.Callback() {
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return false;
}
public void onDestroyActionMode(Ac...
Making the Android emulator run faster
...ve to properly shut down your emulator device (hold the power button, then select Power off) to avoid having errors when you start it the next time (I could just close the ARM emulator, but with the Intel emulator, just closing seems to create problems).
– ADTC
...