Anyone have any idea? And any open source sofware which also seens to perform this kind of functionality?
Toad does it. It is under Tools|SGA Trace/optimization.
Here is your open source solution :-)
select distinct
vs.sql_text, vs.sharable_mem, vs.persistent_mem, vs.runtime_mem, vs.sorts, vs.executions,
vs.parse_calls, vs.module, vs.action, vs.buffer_gets, vs.disk_reads, vs.version_count,
vs.loaded_versions, vs.open_versions, vs.users_opening, vs.loads, vs.users_executing,
vs.invalidations, vs.serializable_aborts, vs.command_type,
to_char(to_date(vs.first_load_time,'YYYY-MM-DD/HH24:MI:SS'),'MM/DD HH24:MI:SS') first_load_time,
rawtohex(vs.address) address, vs.hash_value hash_value, vs.parsing_user_id
,rows_processed
,optimizer_mode
,vs.is_obsolete, vs.elapsed_time, vs.cpu_time
,vs.Child_latch, vs.fetches
,vs.program_id,vs.java_exec_time,vs.plsql_exec_time,vs.user_io_wait_time,
vs.cluster_wait_time, vs.concurrency_wait_time, vs.application_wait_time,
vs.direct_writes, vs.end_of_fetch_count
from v$sqlarea vs
Related
I am making an UWP in which I need to access a database. To do so I first downloaded and installed the SQL Universal Windows Platform from this link:
https://sqlite.org/download.html
After this was done I added it as a reference and included it in my code with:
#include <sqlite3.h> //Not sure if I need to make any other changes for this to work
To troubleshoot I have just a button and a textbox. This is the code that it's been run when the button is clicked:
int rc;
sqlite3 *testDB;
if (SQLITE_OK == (rc = sqlite3_open("signers.db", &testDB))) {
Message->Text = "It worked!";
}
else {
Message->Text = "Can't open Database";
}
signers.db it's a database that I created using SQLite so I could have some data to read from my program. Everytime I run the program the text "Can't open Database" appears. I've tried every solution that I see online but none seem to work for me thus I think that I overseeing something. I am fairly new at UWP and also at using databases.
If you need any additional information feel free to ask for it.
If you have the database in your package folder, then it is read-only. You need to use sqlite3_open_v2 and pass the SQLITE_OPEN_READONLY flag.
If you want to open the database for read / write then you need to copy it to your local folder first.
(Also make sure you actually have the database set to deploy; in the Properties window make sure it is set to Content and that it will be copied to the output directory).
According to
https://learn.microsoft.com/en-us/windows/uwp/files/file-access-permissions
you have some limitations to the location where the db file you want to open is located. sqlite itself should work. Try opening a db in a folder specified in the article.
Could also be just a corrupted db file. Did you try to create an empty one?
I need a way to auto create a procedure inside my qt code. My seniors said that currently in our version of qt lib (4.7.3) it is not possible to use query.exec function. Maybe i can use qprocess? Please give me some ideas.
http://www.qtcentre.org/threads/16287-Cannot-create-MySQL-stored-procedure-views-from-Qt
This answer my question.
Do not use mysql delimiters (such as $$).
And separate the execution of drop and create.
QSqlQuery query;
QString command= "DROP PROCEDURE IF EXISTS PROC_X";
query.exec(command);
command = "CREATE PROCEDURE PROC_X";//(Just put your own statement there)
query.exec(command);
I would like to use the SQL_ATTR_TRACE=SQL_OPT_TRACE_ON option of QSqlDatbase object.
QSqlDatabase db_;
db_.setConnectOptions("SQL_ATTR_TRACE=SQL_OPT_TRACE_ON");
I'm wondering where the resulting trace file is located ?
Is there a way to define the path ?
Thanks
it exists a SQL_ATTR_TRACEFILE attribute
db_.setConnectOptions("SQL_ATTR_TRACEFILE =c:\\odbc.log");
I'm new to the topic shell extensions and I'm looking for resources about namespace extensions. I would like to write a namespace extension which supports SFTP with all options to browse like FTP in the explorer.
I read the examples 1, 2 of zengxi from codeproject, but they don't compile right and seems to be old. I think that there were also many changes like the folder selection in the address bar.
Can somebody provide me some resources in the right direction or some working examples?
UPDATE:
It is important that the source is free. This is a non-profit project.
At the moment I found a good source on the MSDN called Explorer Data Provider Sample. This is up to date and provides some aliases Explorer Data Provider and Shell Data Source. What is yet missing is drop & drag support and a glue for supporting protocol links.
For future usage it would be great to find a way to associate a file extension with that shell data source like zip files.
Here is the full example of creating a namespace to mapping real files on Flickr.
However, only source codes available. No tutorial.
Hope it helps....
http://www.viksoe.dk/code/flickrdrive.htm
For Drag&Drop, this series of articles are a great point to start. After I understood that the files must have the flag can copy, can move, etc. I had almost the solution. The magic was to add one line in GetAttributesOf:
*rgfInOut |= SFGAO_CANCOPY|SFGAO_CANMOVE;
Also I had to publish the IDataObject in GetUIObjectOf like this:
if(riid == IID_IDataObject) {
PWSTR pszName;
hr = _GetName(apidl[0], &pszName);
hr = SHCreateDataObject(m_pidl, cidl, apidl,
new CFileDataObject(pszName), riid, ppv);
} else if(riid == IID_IDropTarget) {
// TODO publish
return E_NOINTERFACE;
}
That's all.
By the way what is the best practice for allocating CFileDataObject here?
Take a look at the EZNamespaceExtensionsMFC library which makes it very easy to develop namespace extensions. Check out its FileBrowser and RegBrowser samples which you can use a starting point.
DISCLAIMER: I work for LogicNP Software, the developer of EZNamespaceExtensionsMFC
I am writing an background service application that has to automatically read data from Excel 2003 files. But no matter what I try, the method OlePropertyGet() always results in an EAccessViolation error while trying to read from address "00000800".
The error always occurs at the last line of this code snippet, and seems independent of what parameter the method receives:
Variant excel, workbooks;
try
{
excel = GetActiveOleObject("Excel.Application");
}
catch(...)
{
excel = CreateOleObject("Excel.Application");
}
workbooks = excel.OlePropertyGet("Workbooks");
I've done some extensive google search on this, but found nothing that's even remotely helpful, only this forum thread where someone has the same issue, but doesn't give any information about the cause or solution (it's somewhat funny that at one point the author mentions he knows the cause, but doesn't say what it is!).
I'm open to any ideas as to what is causing this and how to solve this problem, but also alternative approaches to Excel OLE automation.
My guess is its a null pointer issue..
It looks like neither GetActiveOleObject() nor CreateOleObject() worked.
Try checkign the validity of 'excel' before calling OlePropertyGet.
And I guess you should make sure you have Excel installed.
You can use Visual Studio Tools for Office (see http://msdn.microsoft.com/en-us/library/d2tx7z6d.aspx).
Or you can use ATL support to instantiate the object model provided by office.
Your code may not be able to resolve "Excel.Application" successfully, leading to a null pointer. It uses a registry lookup with that string to identify Excel. It sounds like you're missing that registry entry.
I use such code to determine validity of created objects(in C++ Builder):
Varaint excel = GetActiveOleObject("Excel.Application");
TAutoDriver<IDispatch> dispatcher;
dispatcher.Bind(excel, false);
if (dispatcher.IsBound())
{
Variant workbooks = excel.OlePropertyGet("Workbooks");
}