triggers

问题 Is it possible to dynamically access a column value from a record by its name? I'm writing a trigger function that executes a dynamic SQL command and I would like to dynamically extract a column value from a NEW record by column name. Here's a simplified example of what I'm trying to do: $$ DECLARE command text := 'UPDATE $1 SET $2 = $3'; myColumn := 'votes' BEGIN EXECUTE command using 'anotherTable', myColumn, NEW.myColumn; END $$ 回答1: That's possible , but the USING clause of EXECUTE can

问题 I am trying to trigger the running of a shell script using PHP. Essentially, when a user completes an action on our website programmed in PHP, we want to trigger a shell script which itself calls a Java file. Thanks in advance! 回答1: See shell_exec(), exec() and other Program execution functions 回答2: Using shell_exec you can invoke scripts and commands. 回答3: use the exec() function to execute an external script or function: http://us3.php.net/manual/en/function.exec.php 来源： https:/

问题 In our application at the database level, I have a table called Installments in schema Billing and Billing_History. The trigger shown is on the Installments table in the Billing Schema. What this does is everytime a record is inserted/updated in the billing schema it is also written into the history file. If the record is deleted from the billing table it is written to the history table with a "Deleted" indicator = true. I think that the "If Not Exists (Select * from Inserted) is killing my

问题 I've got this problem with this excercice: Table Friend Friend1 Friend2 Table Relationship Friend1 Friend2 GradeOfFriendship So, i need to create a trigger system that make symmetric tuple after delete, insert update for example insert into Friend values('Luc' ,'Mark') my trigger system must insert into the table Friend the following value Mark Luc So i've symmetric tuple. But is not my real problem after insert, update, delete on table friend i must have another trigger that works only on

问题 I've got this problem with this excercice: Table Friend Friend1 Friend2 Table Relationship Friend1 Friend2 GradeOfFriendship So, i need to create a trigger system that make symmetric tuple after delete, insert update for example insert into Friend values('Luc' ,'Mark') my trigger system must insert into the table Friend the following value Mark Luc So i've symmetric tuple. But is not my real problem after insert, update, delete on table friend i must have another trigger that works only on

问题 i've a Button like this <Button Content="Add"> <Button.Style> <Style TargetType="{x:Type Button}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type Button}"> <StackPanel Orientation="Horizontal"> <Image x:Name="image" Source="../Resources/Images/Icons/Pruefplan_Add_32_gray.png" Margin="8" /> <TextBlock x:Name="text" Text="ADD" Margin="3,0,3,0" VerticalAlignment="Center"></TextBlock> </StackPanel> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value=

问题 i've a Button like this <Button Content="Add"> <Button.Style> <Style TargetType="{x:Type Button}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type Button}"> <StackPanel Orientation="Horizontal"> <Image x:Name="image" Source="../Resources/Images/Icons/Pruefplan_Add_32_gray.png" Margin="8" /> <TextBlock x:Name="text" Text="ADD" Margin="3,0,3,0" VerticalAlignment="Center"></TextBlock> </StackPanel> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value=

问题 Am trying to deploy my CLR Trigger built on .Net 4.0 but changed the target framework to 3.0 but i got the below error message. ------ Deploy started: Project: ServiceClient, Configuration: Debug Any CPU ------ Build started 18/01/2012 2:16:24 PM. SqlClrDeploy: Beginning deployment of assembly ServiceClient.dll to server WS037298 : custDB The following error might appear if you deploy a SQL CLR project that was built for a version of the .NET Framework that is incompatible with the target

问题 This is a rephrased question from here. After some testing I isolated the problem, but have no clue on fixing it. No need to read the previous question, this is the simplified code: THE PROBLEM -> trigger('click') executes, but the event doesn't trigger when inside looped (intervaled) function $(document.ready(function(){ var checkForConfirmation = function(){ clearInterval(checkInterval); $("#anchorLink").trigger('click'); } var checkInterval = setInterval(function(){checkForConfirmation()},

问题 I'm new to triggers and I need to fire a trigger when selecting values from a database table in sql server. I have tried firing triggers on insert/update and delete. is there any way to fire trigger when selecting values? 回答1: There are only two ways I know that you can do this and neither are trigger. You can use a stored procedure to run the query and log the query to a table and other information you'd like to know. You can use the audit feature of SQL Server. I've never used the latter,