使用 Mysql Ruby 设置连接超时
我正在使用 mysql (5.1) ruby (1.8.7) 连接器从数据库中提取一些数据。有些查询的运行时间往往比预期的要长,因此我想为这些查询设置连接超时。 相关帖子提出的解决方案是以下:
require 'rubygems'
require 'mysql'
# connect to the database
db = Mysql.real_connect( 'server', 'user', 'password', 'schema' )
# configure read timeout
db.options(Mysql::OPT_READ_TIMEOUT, 10)
# query and process
begin
db.query("select * from ..").each_hash do |row|
# process data if query returned
end
rescue Mysql::Error => err
# handle timeout
end
但是,这似乎对我不起作用。有什么想法为什么以及如何实现我所追求的目标吗?谢谢。
I'm working with mysql (5.1) ruby (1.8.7) connector to extract some data from a database. Some queries tend to run longer than desired, so I'd like to set a connection timeout on these. A solution proposed by a related post is the following:
require 'rubygems'
require 'mysql'
# connect to the database
db = Mysql.real_connect( 'server', 'user', 'password', 'schema' )
# configure read timeout
db.options(Mysql::OPT_READ_TIMEOUT, 10)
# query and process
begin
db.query("select * from ..").each_hash do |row|
# process data if query returned
end
rescue Mysql::Error => err
# handle timeout
end
However, this doesn't seem to work for me. Any ideas why and how to accomplish what I'm after? Thanks.
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您可能必须在实际连接之前设置选项。
You might have to set the options before actually connecting.