The other day when I was preparing for Microsoft exam 70-229 and I was reading up on triggers and I noticed that the documentation states that the default behavoir of triggers is to fire after the update\insert\delete transaction on the table that the trigger is created on. However, I have noticed that this is not totally accurate. If you setup a trace in profiler with the with all of the xxxstarted and xxxcompleted events for the T-SQL and stored procedure event classes you will notice that the originating transaction starts, then the trigger starts, then the trigger completes and then the originating transaction completes.
So after thinking about this for a while, I have to come to the conclusion that sql server must consider the trigger as part of the orignating transaction, and must therefore complete the trigger before the originating transaction commits. With this in mind, should'nt the default behavoir of triggers be considered "during" and not "after".I believe they fire after the update\insert\delete, but before the commit. They certainly occur during the transaction, because an error in a poorly written trigger can roll back the whole thing.|||I believe they fire after the update\insert\delete, but before the commit. They certainly occur during the transaction, because an error in a poorly written trigger can roll back the whole thing.
I think both statements are accurate. What differentiates an 'after' trigger from a before (or INSTEAD OF) trigger is that it (the INSTEAD OF trigger) executes before any transaction is opened on the underlying table/view. Perhaps a blinding statement of the obvious, but as often the case in semantics, the BEFORE trigger needed an 'opposite' and that opposite became 'after'.
Regards,
hmscott
Showing posts with label documentation. Show all posts
Showing posts with label documentation. Show all posts
Tuesday, March 27, 2012
Tuesday, March 20, 2012
applying styles to reports DataTransform property
I was hoping that I could create an xsl file to change background colors and
the like in my report. The DataTransform documentation ain't so great.
After creating the xsl file and uploading it to the server and setting the
DataTransform property no changes were evident, I think it only operates on
xml format or something along those lines. Mainly we use pdf and html
rendering. So now I'm thinking I can apply the xsl and generate different
styles when I deploy the reports and add the drop down style selection to
the web app. Anyone giving their users the ability to pick a report style,
and how are you going about it? Any thoughts?
For Example:
deployment:
msxsl myReport.rdl slate.xsl -xe -o myReport_slate.rdl
msxsl myReport.rdl forest.xsl -xe -o myReport_forest.rdl
Here's an example xsl
<?xml version="1.0"?>
<xsl:stylesheet version="2.0"
xmlns="http://schemas.microsoft.com/sqlserver/reporting/2005/01/reportdefinition"
xmlns:rd="http://schemas.microsoft.com/SQLServer/reporting/reportdesigner"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:msrs="http://schemas.microsoft.com/sqlserver/reporting/2005/01/reportdefinition"
xmlns:fn="http://www.w3.org/2005/xpath-functions"
exclude-result-prefixes="msrs xs fn">
<xsl:output method="xml" standalone="no" omit-xml-declaration ="no"
indent="yes"/>
<xsl:template match="//msrs:FontFamily">
<FontFamily>Tahoma</FontFamily>
</xsl:template>
<xsl:template match="//msrs:BackgroundColor">
<BackgroundColor>SteelBlue</BackgroundColor>
</xsl:template>
<xsl:template match="@.* | node()" priority="-2">
<xsl:copy>
<xsl:apply-templates select="@.* | node()"/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>Hi, I read your post regarding the use of DataTransform in reporting service. If you make any progress with it, would be kind enough to share it?
Thank You.
Rif'at
EggHeadCafe.com - .NET Developer Portal of Choice
http://www.eggheadcafe.comsql
the like in my report. The DataTransform documentation ain't so great.
After creating the xsl file and uploading it to the server and setting the
DataTransform property no changes were evident, I think it only operates on
xml format or something along those lines. Mainly we use pdf and html
rendering. So now I'm thinking I can apply the xsl and generate different
styles when I deploy the reports and add the drop down style selection to
the web app. Anyone giving their users the ability to pick a report style,
and how are you going about it? Any thoughts?
For Example:
deployment:
msxsl myReport.rdl slate.xsl -xe -o myReport_slate.rdl
msxsl myReport.rdl forest.xsl -xe -o myReport_forest.rdl
Here's an example xsl
<?xml version="1.0"?>
<xsl:stylesheet version="2.0"
xmlns="http://schemas.microsoft.com/sqlserver/reporting/2005/01/reportdefinition"
xmlns:rd="http://schemas.microsoft.com/SQLServer/reporting/reportdesigner"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:msrs="http://schemas.microsoft.com/sqlserver/reporting/2005/01/reportdefinition"
xmlns:fn="http://www.w3.org/2005/xpath-functions"
exclude-result-prefixes="msrs xs fn">
<xsl:output method="xml" standalone="no" omit-xml-declaration ="no"
indent="yes"/>
<xsl:template match="//msrs:FontFamily">
<FontFamily>Tahoma</FontFamily>
</xsl:template>
<xsl:template match="//msrs:BackgroundColor">
<BackgroundColor>SteelBlue</BackgroundColor>
</xsl:template>
<xsl:template match="@.* | node()" priority="-2">
<xsl:copy>
<xsl:apply-templates select="@.* | node()"/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>Hi, I read your post regarding the use of DataTransform in reporting service. If you make any progress with it, would be kind enough to share it?
Thank You.
Rif'at
EggHeadCafe.com - .NET Developer Portal of Choice
http://www.eggheadcafe.comsql
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