triggers

问题 I have a program, which will poll on a certain key from the redis datastore, and do something when the value satisfies a certain condition. However, I think periodically polling on redis is quite inefficient, I'm wondering if there is a "trigger" mechanism for redis, when the value changes and satisfies the condition, the trigger will be called. The trigger might be a RPC function, or an HTTP msg, or something else, so that I don't need to poll on it any more, just like the difference between

问题 I have a program, which will poll on a certain key from the redis datastore, and do something when the value satisfies a certain condition. However, I think periodically polling on redis is quite inefficient, I'm wondering if there is a "trigger" mechanism for redis, when the value changes and satisfies the condition, the trigger will be called. The trigger might be a RPC function, or an HTTP msg, or something else, so that I don't need to poll on it any more, just like the difference between

问题 Is this redundant? Is there a simpler way to write this? if(e.range.getSheet().getName() == 'Estimate'){ var thisss = SpreadsheetApp.getActive().getSheetByName('Estimate'); } 回答1: Yes. This is known as WET solution. The DRY(Don't repeat yourself) principle is stated as "Every piece of knowledge must have a single, unambiguous, authoritative representation within a system". Simply put, If you trace a branch of code(say, a variable information), it should have a single line to the root of the

问题 I'm pulling over from a previous post of mine, MSSQL Msg 102 '.' and column name begins with number. I keep getting a Msg 102 incorrect syntax within a stored procedure, when I try to run an UPDATE. OK, I think I have found where the issue is at. It is in a TRIGGER, for insert, update, delete: DECLARE @bit INT , @field INT , @maxfield INT , @char INT , @fieldname VARCHAR(64) , @TableName VARCHAR(64) , @PKCols VARCHAR(1000) , @sql VARCHAR(2000) , @UpdatedDate VARCHAR(21) , @UserName VARCHAR(64

问题 I am a PL/SQL newbie and I'm struggling with a trigger. Description: I have three objects - PRODUCT, CONTAINS, ORDER. One product can have many CONTAINS and one ORDER can have many CONTAINS (basically it used to be Many-to-many relationship between PRODUCT and ORDER). Each Product has a column "value", each CONTAINS has a column "amount" and each ORDER has a column "total". When I add a new PRODUCT to ORDER via creating new CONTAINS, I want to recalculate field "total" on ORDER. Example:

问题 I'm pulling over from a previous post of mine, MSSQL Msg 102 '.' and column name begins with number. I keep getting a Msg 102 incorrect syntax within a stored procedure, when I try to run an UPDATE. OK, I think I have found where the issue is at. It is in a TRIGGER, for insert, update, delete: DECLARE @bit INT , @field INT , @maxfield INT , @char INT , @fieldname VARCHAR(64) , @TableName VARCHAR(64) , @PKCols VARCHAR(1000) , @sql VARCHAR(2000) , @UpdatedDate VARCHAR(21) , @UserName VARCHAR(64

问题 I have a Spreadsheet script with an onEdit trigger. For some reason two onEdit triggers are "fired": an installed trigger and a simple trigger. I set up onEdit to send an email. This was authenticated for the installed trigger and works fine. However, each time it fires the simple trigger it throws an exception. Is it possible to remove or disable the simple trigger so that it doesn't throw the exception? I wrote a simple function to check what triggers my script was using. It only shows one

问题 I'm trying to trigger the execution of a function after like 1 second but google execute the function after 40 seconds or something 2 minutes. Here is my code function testFunc () { Logger.log("test called"); } function myFunction() { const now = Date.now(); const dateNow = new Date(Date.now()); const dateLater = new Date(now + 1000); const trigg = ScriptApp.newTrigger('testFunc') .timeBased() .inTimezone("Europe/Paris") // .at(dateLater) // 1sec .after(1000) // 1sec .create(); } I tried with

问题 I have to write a trigger in db. I wanted to declare some local variables inside it and do some manipulations before inserting the value to a table. Using DB2, is it possible to have local variables inside trigger code? 回答1: Yes you can! Here's some example code (All in SQL) from the iSeries DB2 SQL Programming manual (which tends to run a few versions behind LUW): CREATE TRIGGER TransactionBeforeTrigger BEFORE INSERT ON TransactionTable REFERENCING NEW AS new_row FOR EACH ROW MODE DB2ROW

问题 I'm currently having a problem with triggers on a current prototype of a game database i'm working on So, I have these two tables CREATE TABLE public.hunters ( id integer NOT NULL, name character varying(30) COLLATE pg_catalog."default" NOT NULL, weapon character varying(30) COLLATE pg_catalog."default" NOT NULL, ranking character varying(30) COLLATE pg_catalog."default" NOT NULL, nhunts integer NOT NULL, sex character(1) COLLATE pg_catalog."default" NOT NULL, title character varying(30)