xavierh

The number of records affected is not returned for SQLServer Compact

9 posts in this topic

#1 ·  Posted (edited)

This SQL CE feature works fine under vbscript, but not under AutoIT.

In the vbscript code below, only 1 record is affected, and iRecAffected is correctly set to 1. The value is set by ref.

set oCon = createobject("ADODB.Connection")

set oRS = createobject("ADODB.Recordset")

oCon.Open "Provider=Microsoft.SQLSERVER.CE.OLEDB.4.0;Data Source=C:\data\test.sdf;"

oRS.CursorLocation = 2 'adUseServer

Dim iRecAffected

oCon.Execute ("update tests set status = 'nothang' where id = 10", iRecAffected)

msgbox iRecAffected ' this works fine

In the equivalent autoIT code, though the update query succeeds, $RecAffected is not populated. It looks like the byref value is not updated:

Dim $oCon = ObjCreate("ADODB.Connection")

Dim $oRS = ObjCreate ( "ADODB.Recordset" )

Dim $RecAffected

$oCon.Open("Microsoft=SQLSERVER.CE.OLEDB.4.0;Data Source='C:\data\test.sdf;")

oCon.Execute ("update tests set status = 'nothing' where id = 10", $RecAffected)

msgbox ( 0, "", $RecAffected ) ; the displayed value is empty

Short of running another query to verify the update, any ideas? Has anyone had success with a different syntax? I have tried the recordset route, which does return the rows affected for some databases, but it looks like the ado driver does not support update queries that way. So far the only way I have managed to get update queries to work is using Connection.Execute().

Thanks,

Xavier

Edited by xavierh

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How about with parenthesis?

$oCon.Execute ("update tests set status = 'nothing' where id = 10", $RecAffected)

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#3 ·  Posted (edited)

hmm, thanks, that's what I meant. The actual code that fails had the parentheses. Typo... now it's fixed in the first post. But the issue is still the same :huh2:

Edited by xavierh

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Currently, ByRef values on COM object methods don't work out of the box. It's even hard to make them work at all.

The simplest route is to issue another SQL statement.


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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#5 ·  Posted (edited)

On 15. 6. 2011 at 10:41 PM, jchd said:

Currently, ByRef values on COM object methods don't work out of the box. It's even hard to make them work at all.

The simplest route is to issue another SQL statement.

Hello,

please is there any way how get number of Affected Records ? My code below returns $iRecordsAffected = 0

Local $sODBCQuery = "UPDATE ""Some_Table"" SET ""Some_Column""='Some_Value' WHERE ""Some_Column""='Some_Value'"
Local $iRecordsAffected = 0
$oRS = $oConn.Execute($sODBCQuery, $iRecordsAffected)

I need manage "LOST UPDATE" problem, so I need know if UPDATE RecordsAffected is zero or not..

Thanks for your help..

Edited by mostyr

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#6 ·  Posted (edited)

jchd told that this not works, and this still not works.

 

Edited by mLipok

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"Program are meant to be read by humans and only incidentally for computers and execute" - Donald Knuth, "The Art of Computer Programming"
:naughty:  :ranting:, be  :) and       \\//_.

Anticipating Errors :  "Any program that accepts data from a user must include code to validate that data before sending it to the data store. You cannot rely on the data store, ...., or even your programming language to notify you of problems. You must check every byte entered by your users, making sure that data is the correct type for its field and that required fields are not empty."

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Use a trigger in standard SQL. Some engine offer a proprietary function just for that (e.g. for SQLite: SQL extra function changes() or engine API function sqlite3_changes()). A trigger is obviously more portable.


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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#8 ·  Posted (edited)

http://stackoverflow.com/questions/1103260/return-number-of-rows-affected-by-update-statements/1103272#1103272

CREATE PROCEDURE UpdateTables
AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;
    DECLARE @RowCount1 INTEGER
    DECLARE @RowCount2 INTEGER
    DECLARE @RowCount3 INTEGER
    DECLARE @RowCount4 INTEGER

    UPDATE Table1 Set Column = 0 WHERE Column IS NULL
    SELECT @RowCount1 = @@ROWCOUNT
    UPDATE Table2 Set Column = 0 WHERE Column IS NULL
    SELECT @RowCount2 = @@ROWCOUNT
    UPDATE Table3 Set Column = 0 WHERE Column IS NULL
    SELECT @RowCount3 = @@ROWCOUNT
    UPDATE Table4 Set Column = 0 WHERE Column IS NULL
    SELECT @RowCount4 = @@ROWCOUNT

    SELECT @RowCount1 AS Table1, @RowCount2 AS Table2, @RowCount3 AS Table3, @RowCount4 AS Table4
END

http://stackoverflow.com/questions/7005225/sql-server-does-trigger-affects-rowcount

 

Edited by mLipok

Signature beginning:   Wondering who uses AutoIT and what it can be used for ?
* GHAPI UDF - modest begining - comunication with GitHub REST API *
ADO.au3 UDF     POP3.au3 UDF     XML.au3 UDF    How to use IE.au3  UDF with  AutoIt v3.3.14.x  for other useful stuff click the following button

Spoiler

Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind. 

My contribution (my own projects): * Debenu Quick PDF Library - UDF * Debenu PDF Viewer SDK - UDF * Acrobat Reader - ActiveX Viewer * UDF for PDFCreator v1.x.x * XZip - UDF * AppCompatFlags UDF * CrowdinAPI UDF * _WinMergeCompare2Files() * _JavaExceptionAdd() * _IsBeta() * Writing DPI Awareness App - workaround * _AutoIt_RequiredVersion() * Chilkatsoft.au3 UDF * TeamViewer.au3 UDF * JavaManagement UDF * VIES over SOAP * WinSCP UDF * GHAPI UDF - modest begining - comunication with GitHub REST API *

My contribution to others projects or UDF based on  others projects: * _sql.au3 UDF  * POP3.au3 UDF *  RTF Printer - UDF * XML.au3 - BETA * ADO.au3 UDF SMTP Mailer UDF *

Useful links: * Forum Rules * Forum etiquette *  Forum Information and FAQs * How to post code on the forum * AutoIt Online Documentation * AutoIt Online Beta Documentation * SciTE4AutoIt3 getting started * Convert text blocks to AutoIt code * Games made in Autoit * Programming related sites * Polish AutoIt Tutorial * DllCall Code Generator * 

Wiki: Expand your knowledge - AutoIt Wiki * Collection of User Defined Functions * How to use HelpFile * Best coding practices * 

IE Related:  * How to use IE.au3  UDF with  AutoIt v3.3.14.x * Why isn't Autoit able to click a Javascript Dialog? * Clicking javascript button with no ID * IE document >> save as MHT file * IETab Switcher (by LarsJ ) * HTML Entities * _IEquerySelectorAll() (by uncommon) * 

I encourage you to read: * Global Vars * Best Coding Practices * Please explain code used in Help file for several File functions * OOP-like approach in AutoIt * UDF-Spec Questions *  EXAMPLE: How To Catch ConsoleWrite() output to a file or to CMD *

"Homo sum; humani nil a me alienum puto" - Publius Terentius Afer
"Program are meant to be read by humans and only incidentally for computers and execute" - Donald Knuth, "The Art of Computer Programming"
:naughty:  :ranting:, be  :) and       \\//_.

Anticipating Errors :  "Any program that accepts data from a user must include code to validate that data before sending it to the data store. You cannot rely on the data store, ...., or even your programming language to notify you of problems. You must check every byte entered by your users, making sure that data is the correct type for its field and that required fields are not empty."

Signature last update: 2017-06-04

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Agreed this can be a solution for some engines but it's far from universal.


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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