triggers

问题 When creating a trigger programmatically, i.e. through ScriptApp.newTrigger() , does it always point to the "head" deployment, or the most recent published (versioned) deployment? (See documentation on deployment types here.) For context, I'm distributing a script in a multi-user environment which relies on triggers to run every few minutes. I'm trying to ensure that changes made in development (i.e. before publishing those changes) are not picked up immediately by all the clients of the

问题 When creating a trigger programmatically, i.e. through ScriptApp.newTrigger() , does it always point to the "head" deployment, or the most recent published (versioned) deployment? (See documentation on deployment types here.) For context, I'm distributing a script in a multi-user environment which relies on triggers to run every few minutes. I'm trying to ensure that changes made in development (i.e. before publishing those changes) are not picked up immediately by all the clients of the

问题 Due to reputation constraints, this is a follow-up question to this answer to a prior question. I'd like to know if there's a more efficient way to test each field for changes while handling NULL values. CREATE TABLE foo ( a INT NULL DEFAULT NULL, b INT NULL DEFAULT NULL, c INT NULL DEFAULT NULL ); CREATE TABLE bar ( a INT NULL DEFAULT NULL, b INT NULL DEFAULT NULL, c INT NULL DEFAULT NULL ); INSERT INTO foo (a, b) VALUES (1, 2); I want a trigger whose actions occur after update only if a

问题 Using jQuery 1.2.x and jQuery UI 1.5.x, one was able to trigger dragging manually like so: jQuery("#myDiv").mousedown(function(ev) { target = jQuery(ev.target); if (target.hasClass("drag-me")) { target.draggable({ helper: "clone", start: function() { console.log("drag start"); }, stop: function() { jQuery(this).draggable("destroy"); } }).trigger("mousedown.draggable", [ev]); } }); It is applied to the following HTML: <div id="myDiv"> <div class="drag-me"></div> <div class="drag-me"></div>

问题 Is it possible to create a new event from inside a trigger? It's not something I'd particularly recomment, but I'm just wondering if it can be done. I would like to fire a insert in response to an update, but have the insert be done delayed. Right now I insert a value into a temp table and have a predefined event sweep that table every x minutes. However this seems wasteful because most of the time there's nothing to do. If I cannot create the event, can I at least enable/disable it on the

问题 Background In a PostgreSQL 9.0 database, there are various tables that have many-to-many relationships. The number of those relationships must be restricted. A couple of example tables include: CREATE TABLE authentication ( id bigserial NOT NULL, -- Primary key cookie character varying(64) NOT NULL, -- Authenticates the user with a cookie ip_address character varying(40) NOT NULL -- Device IP address (IPv6-friendly) ) CREATE TABLE tag_comment ( id bigserial NOT NULL, -- Primary key comment_id

问题 I find the explanation of DEFINER in the MySQL manual confusing, so I am not sure what privileges are required for the 'execute user' under which the application is running. For security, I like to limit the 'execute user' to the least amount of permissions needed. I understand that the creator of a trigger/stored procedure requires SUPER privileges, but does the 'execute user' also require SUPER permissions? I created a trigger under a user that eventually lost privileges to my database. The

问题 I have an insert trigger which takes a set of column values from rows in table A and inserts some of them in table B and remaining in table C. I need this operation to be a transaction wherein if there is some error whilst data is inserted in table B and not C, the entire insertion operation should be rolled back. I studied the manual and it says at the last of this page that transaction is not allowed in triggers Is there a way to achieve what I want in mysql. 回答1: Yes you can, but how you

问题 Where would a trigger be stored if I created it to trigger on "ALL SERVER". CREATE TRIGGER trg_LogonAttempt ON ALL SERVER FOR LOGON AS BEGIN IF ORIGINAL_LOGIN() = 'dbo' I would like to be able to find and modify it again if I close it down. I know where triggers are normally saved in the object explorer under table. Thank you. 回答1: You can get this from the catalog view in the master database: USE master; GO SELECT name, OBJECT_DEFINITION ([object_id]) FROM sys.server_triggers -- WHERE name =

问题 I have a datagrid bound to an ObservableCollection, and what I'd like to do is highlight new rows when they are added to the datagrid (i.e. when a new object is inserted into the ObservableCollection). I'd like to highlight the rows when they are inserted by changing the background colour initially, but then having the colour fade back to normal over time. I've tried a variety of different methods to get it to work but nothing quite works properly. Method 1: I have an event trigger that fires