Check whether a row is inserted in mysql table

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Hi all,
I am developing a chat system in php. So whenever user sends message to another user the receiving user's chatbox should get refreshed. I have stored messages in mysql table. So whenever one record get inserted in table i should reload the chatbox. How to do this? Can i use trigger for this?

Posted 14-Feb-13 19:27pm

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vinodkumarnie · Answer 1 · 2013-02-14T20:03:00

Two ways..

1. You can have Output variable in your stored proceedure indicating successful or failure of inserting.

if output variable value successful then the record get inserted. else not inserted.

2. You can use trigger's. This works when row inserted or deleted or updated.

For more see below link..
http://dev.mysql.com/doc/refman/5.0/en/create-trigger.html[^]
http://dev.mysql.com/doc/refman/5.0/en/triggers.html[^]
http://www.sitepoint.com/how-to-create-mysql-triggers/[^]

vinodkumarnie · Answer 2 · 2013-02-14T20:08:00

Here is one example..

SQL

ALTER PROCEDURE dbo.postcomments_sp_global
	@aaa,
	@output varchar(50) output // output variable
	AS
	begin try
	insert into tablename(col1) 
values(@aaa) 
set @output='Record inserted successfully... Thank you..'
print @output
end try
begin catch
set @output=(select error_message() as err)//error message
end catch

Check whether a row is inserted in mysql table

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