triggers

问题 I'm trying to check if the room that is going to be inserted in the system is already rented at that date or not. I've though about counting the rows that match both the room number and the date, and then rolling back the transaction. But I'm getting the following error, even though I have changed the code to raise user-defined exceptions: ERROR: cannot begin/end transactions in PL/pgSQL HINT: Use a BEGIN block with an EXCEPTION clause instead. CONTEXT: PL/pgSQL function "checkRoom"() line 17

问题 Having a look at the AWS documentation, https://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-identity-pools-working-with-aws-lambda-triggers.html#cognito-user-pools-lambda-trigger-syntax-pre-signup you have the following paramaters available in the Pre Sign-up Lambda fuction: "request": { "userAttributes": { "string": "string", .... }, "validationData": {<validation data as key-value (String, String) pairs, from the client>} is there a way to modify or add additional

问题 I have a simple details table like so: listid custid status last_changed The primary key consists of both listid and custid . Now I'm trying to setup a trigger that sets the last_changed column to the current datetime every time an insert or update happens. I've found lots of info on how to do that with a single PK column, but with multiple PKs it gets confusing on how to correctly specify the PKs from the INSERTED table. The trigger has to work in SQL Server 2005/2008/R2. Thanks for a

问题 I have such problem as described in cannot login to sql server due logon trigger But I use Oracle. Is there same thing like "Dedicated Admin Connection"? Or are there any other method to solve this problem? 回答1: In Oracle, a user with the ADMINISTER DATABASE TRIGGER privilege should be able to log in even if a logon trigger throws an error. That should include any users with the DBA role. 回答2: Up to Oracle ver. 10g (including) the logon trigger was not fired for users having DBA role. Since

问题 I have ERP database "A" has only read permission, where i cant create trigger on the table. A is made for ERP system (Unknown Program for me ). I have another Database "B" that is private to my application this application work on both databases. i want to reflect A's changes(for any insert/Update/Delete) instantly to B. Is there any Functionality in c# that can work exactly as trigger works in database??? 回答1: You have few solutions, best one depends on which kind of database you have to

问题 I appear to have triggers that I cannot delete in my Google Apps Script. I have a theory as to WHY I cannot delete them, but no clue how to fix the problem. These triggers were attached to a script bound to files on a separate Google account that were shared with me. I of course was able to edit and modify the script and such as I wanted while the files were shared. Since then though the Google account that was sharing the files with me was deleted and I think the triggers that are "frozen"

问题 I have a trigger like below on user table to insert into the audit table with which column was updated and previous value: ALTER TRIGGER [dbo].[trgAfterUpdate] ON [dbo].[tbl_User] AFTER UPDATE AS declare @fieldname varchar(128) ; declare @OldValue varchar(255); declare @CreateUser varchar(100) ; declare @User_Key int; select @CreateUser =i.user_name from deleted i; SELECT @User_Key = i.user_key from inserted i; if update(user_name) begin select @OldValue=j.user_name from deleted j; set

问题 I have a problem with my trigger: CREATE OR REPLACE FUNCTION process_fillDerivedFrom_used() RETURNS TRIGGER AS $fillDerivedFrom_used$ DECLARE prog varchar(255); current varchar(255); BEGIN SELECT u.iduseentity as prog ,g.idCreatedEntity as current FROM entity e JOIN used u ON e.identity=u.iduseentity JOIN activity a ON a.idactivity=u.idusedactivity JOIN generatedby g ON g.idcreatoractivity=a.idactivity INSERT INTO DERIVEDFROM VALUES (prog,current) END; $fillDerivedFrom_used$ LANGUAGE plpgsql;

问题 I have some Update Panels on a webpage all set to UpdateMode="Conditional", however when the AsyncPostBackTrigger on one of the Update Panels is triggered, all of the Update Panels refresh. The following is one of the update panel HTML markup: <asp:UpdatePanel ID="pnls1FieldUpdate" runat="server" UpdateMode="Conditional"> <ContentTemplate> <table class="FillInGrid" cellpadding="0" cellspacing="0"> <tr> <td> <asp:TextBox ID="txtS1ExpDate" runat="server" Width="67px" TabIndex="14"></asp:TextBox

问题 I have a database created in mssql with column last reviewed,if last reviewed column value is not changed for more than 5 days , user need to get mail saying action is pending. 来源： https://stackoverflow.com/questions/50607891/mssql-and-mvc-mail-scheduling-is-required