Comments on: On async

By: Ulf Wendel

Ulf Wendel — Wed, 11 Feb 2009 21:15:06 +0000

Talk to Jim and Georg about it @ Connector/C. Its on their both whishlist, AFAIK. I think Jan has blogged about how it could be hacked.

mysqlnd async “docs” are here http://www.slideshare.net/nixnutz/mysqlnd-async-ipc2008-presentation and I might have a bit more in my blog. Though, I must confess that we have not worked on it since three months.

Judging from the questions Tony asked yesterday, he is done with .NET documentation and back to PHP work. So, there is some hope that he will eventually catch up one fine (soon?) day.

Ulf

By: Monty Taylor

Monty Taylor — Wed, 11 Jun 2008 12:21:12 +0000

MySQL Cluster has a lovely Async API …

By: Domas Mituzas

Domas Mituzas — Wed, 11 Jun 2008 09:12:21 +0000

OK, I see how it is done in mysqlnd – though it asks for multiple connections then, and doesn’t provide polling hooks (ergh, where is the documentation for these features?:)

Oh, and of course – mysql_send_query doesn’t have a manual entry…

By: Alexey Zakhlestin

Alexey Zakhlestin — Wed, 11 Jun 2008 07:28:43 +0000

mysqlnd already provides async api to PHP ;)

By: Andrey Hristov

Andrey Hristov — Wed, 11 Jun 2008 07:24:32 +0000

s/if you use/if you use libmysql/

By: Andrey Hristov

Andrey Hristov — Wed, 11 Jun 2008 07:24:03 +0000

The new MySQL driver for PHP has built-in support for async queries. If you use, you can use async queries in C/C++ if you wish. It’s just that it’s not marketed as async queries, but replication. Libmysql has the function mysql_send_query(), which does exactly what you want. See the following excerpt from the sources :
/*
Send the query and return so we can do something else.
Needs to be followed by mysql_read_query_result() when we want to
finish processing it.
*/

int STDCALL
mysql_send_query(MYSQL* mysql, const char* query, ulong length)
{
DBUG_ENTER(“mysql_send_query”);
DBUG_RETURN(simple_command(mysql, COM_QUERY, (uchar*) query, length, 1));
}
…
my_bool STDCALL mysql_read_query_result(MYSQL *mysql)
{
return (*mysql->methods->read_query_result)(mysql);
}

Voila. Here we go. You want async queries? They are partly there. There is no poll, but won’t be too hard to implement.