Question2Answer Q&A - Recent questions tagged replace

REPLACE query is sometimes very slow

Tue, 28 Apr 2015 05:57:30 +0000

Issue summary

On my site, REPLACE query for qa_options table is very slow. Performance of INSERT and UPDATE are standard. But, only REPLACE is sometimes very slow. In some cases there is a performance difference of 100 times. It is not always occur. For example (worst case) ...

REPLACE : 300ms - 500ms

My experiment

I was remodeled qa_db_set_option() of qa-include/db/options.php.

Case1 (DELETE + INSERT) >>> 7ms - 10ms
Case2 (SELECT + INSERT / UPDATE) >>> 0.5ms - 1ms (Best performance!)

If you have information about this issue, please tell me.

http://bugs.mysql.com/bug.php?id=71507 ???

Server spec

Dedicated server (Web server and database server exist on same hardware)
MySQL version: 5.0

Update Plugin: Lang Filter (V1.0.1)

Sat, 20 Apr 2013 20:00:08 +0000

This plugin replace specific word of lang system of Q2A at once.
Refer to readme in download-file for description.

The phrase of Q2A are taken out from lang file in following order.

qa-lang/custom/qa-lang-*.php
qa-lang/(language code)/qa-lang-*.php
qa-include/qa-lang-*.php

When changing expression, it is best to correct lang souce file. But this plugin may be useful when changing words and phrases at once easily. In addition, this version changes word simply by str_replace of PHP. if this plugin is helpful also to heavy users of Q2A, It may be better to also add replace function by regular expression(preg_replace), And, Since the dictionary used for conversion is cached on memory, risk of performance worsening is minimum.

Screen shot 1: admin -> plugins
Screen shot 2: admin -> plugins -> options (default)
Screen shot 3: admin -> plugins -> options (after setting)
Screen shot 4: page view

Compatibility

1.5.x, 1.6.x, 1.7 (2014/12/19 Updated)

Download

Best regards.

Shortcode replacement plugin?

Tue, 28 Feb 2012 08:07:50 +0000

Here's a simple plugin, it replaces certain text with other text in questions, answers, and comments.

EDIT: now supports regex and html tag substitution

Mostly for simple shortcode replacing, e.g.:

[my-shortcode]

with:

<a href="http://mysite.com/">My Site!</a>

Feedback welcome, the code is here:

https://github.com/NoahY/q2a-shortcode