mysql-event

mysql push notification

由 允我心安 提交于 2021-02-10 14:28:40
问题 Reading that MySQL doesn't have similar to SqlDependency . What is the best snippet to notify other users if a cell changed? Most of the current posts suggest pooling as recommended approach but can't find proper code to study for VB.NET Winform without using third party service such Nub. What I guess could work is to create a CRON job at http server to fetch if that cell(s) changed then store a flag in a secure file; then rather than keep checking MySQL database on interval; watch that flag

Enable MySQL binlog in my.cnf

由 前提是你 提交于 2020-01-23 13:11:13
问题 I tried to use simple example of mysql-events package but when i tried to use it , i got this error: Error: ER_NO_BINARY_LOGGING: You are not using binary logging so i changed my.cnf: # # The MySQL database server configuration file. # # You can copy this to one of: # - "/etc/mysql/my.cnf" to set global options, # - "~/.my.cnf" to set user-specific options. # # One can use all long options that the program supports. # Run program with --help to get a list of available options and with # -

Cronjob or MySQL event?

由 倾然丶 夕夏残阳落幕 提交于 2020-01-08 17:14:09
问题 I have to update my MySQL database every hour, and I was wondering what the advantages/disadvantages of using a cronjob VS a MySQL event? For example, which is faster? Which is safer? Thanks! 回答1: I would always go a cron job, because: That's where sysadmins will expect it to be (this point is not to be underestimated) crobtab is bullet-proof, time-tested, extremely widely used and understood You can freely direct/analyse error/success messages where you want Some database tasks require

MySQL 5.5 Create event gives syntax error

由 橙三吉。 提交于 2019-12-25 08:58:18
问题 I have a problem creating EVENT. I have an 'articoli' table. There is a articoli.titolo field varchar (255) and when I try to create the event like this: CREATE EVENT inser_value ON SCHEDULE every 1 day DO INSERT INTO articoli (titolo) VALUES ('my_value'); This is the mysqlerror's output ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use n ear 'EVENT inser_value ON SCHEDULE every 1 day DO INSERT

how to select all tables with column name and update that column

由 人盡茶涼 提交于 2019-12-22 18:34:53
问题 i want to find all the tables in my db that contain the column name Foo, and update its value to 0, i was thinking something like this , but i dont know how to place the UPDATE on that code, i plan on having this statement on the Events inside the mysql database, im using WAMP, the idea is basically having an event run daily which sets all my 'Foo' Columns to 0 without me having to do it manually SELECT TABLE_NAME, COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE column_name LIKE 'Foo' 回答1:

gettting an error while defining the event name on mysqlworkbench 5.5

由 允我心安 提交于 2019-12-20 05:45:35
问题 I created a stored procedure like the following: -- -------------------------------------------------------------------------------- -- Routine DDL -- Note: comments before and after the routine body will not be stored by the server -- -------------------------------------------------------------------------------- DELIMITER $$ CREATE DEFINER=`MailMe`@`%` PROCEDURE `sp_archivev3`() BEGIN INSERT INTO send.sgev3_archive(a_bi, b_vc, c_int, d_int, e_vc, f_vc, g_vc, h_vc, i_dt, j_vc, k_vc, l_vc, m

Can I avoid two MySQL events running at the same time?

由 99封情书 提交于 2019-12-12 02:09:52
问题 I have an event in MySQL that I want to run very frequently at least every 30 seconds. It is processing data from a queue table that contains recently updated records. Sometimes I receive large batches of updates. When this occurs the event may take longer to run than the usual 2-3 seconds. If it is still running at the time of the next schedule, I want the next event to skip execution. The best way I could think about doing this is to create a 'state' table in which I set a specific key to 1

How would you expire (or update) a MySQL record with precision to the expiry time?

由 白昼怎懂夜的黑 提交于 2019-12-08 02:54:10
问题 Last year I was working on a project for university where one feature necessitated the expiry of records in the database with almost to-the-second precision (i.e. exactly x minutes/hours after creation). I say 'almost' because a few seconds probably wouldn't have meant the end of the world for me, although I can imagine that in something like an auction site, this probably would be important (I'm sure these types of sites use different measures, but just as an example). I did research on

How would you expire (or update) a MySQL record with precision to the expiry time?

由 怎甘沉沦 提交于 2019-12-06 13:32:25
Last year I was working on a project for university where one feature necessitated the expiry of records in the database with almost to-the-second precision (i.e. exactly x minutes/hours after creation). I say 'almost' because a few seconds probably wouldn't have meant the end of the world for me, although I can imagine that in something like an auction site, this probably would be important (I'm sure these types of sites use different measures, but just as an example). I did research on MySQL events and did end up using them, although now that I think back on it I'm wondering if there is a

Enable MySQL binlog in my.cnf

由 时间秒杀一切 提交于 2019-12-06 11:28:49
I tried to use simple example of mysql-events package but when i tried to use it , i got this error: Error: ER_NO_BINARY_LOGGING: You are not using binary logging so i changed my.cnf: # # The MySQL database server configuration file. # # You can copy this to one of: # - "/etc/mysql/my.cnf" to set global options, # - "~/.my.cnf" to set user-specific options. # # One can use all long options that the program supports. # Run program with --help to get a list of available options and with # --print-defaults to see which it would actually understand and use. # # For explanations see # http://dev
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