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Displaying posts with tag: unicode (reset)

Renaming tables with MySQL Enterprise Backup 3.12.0
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Introduction

MySQL Enterprise Backup 3.12.0 (MEB) introduces a new feature for restoring an InnoDB table from a backup. Now it is possible to rename the table during restore. This is useful when the user wants to restore a table from a backup without overwriting the existing version of the table in the database.

The following example illustrates how the renaming feature could be used.  Suppose that the DBA has deleted three rows from a table T1 by mistake and he now wishes to get them back from a backup. He wants to leave the database online and to restore the 3 deleted rows from a …

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WordPress and UTF-8
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Update: WordPress 4.2 has full UTF-8 support! There’s no need to upgrade manually any more.

Using 4-byte UTF-8 (aka 3-byte UNICODE) in MariaDB and MySQL
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As I wrote in a previous post, MariaDB / MySQL has some issues with the standard UTF-8 encoding there. This UTF-8 encoding limits us to 3 UTF-8 bytes or 2 UNICODE bytes if you want to look at it that way. This is slightly limiting, but for languages it is usually pretty much OK, although there are some little used languages in the 3 byte UNICODE range. But in addition to languages, you will be missing symbols, such as smileys!

Help is on the way though, in the utf8mb4 character set that is part of …

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How MariaDB and MySQL makes life with UTF-8 a bit too easy. And how to fix it...
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UNICODE is getting more and more traction and most new applications, at least web applications, support UNICODE. I have written about UNICODE and related stuff before in Character sets, Collations, UTF-8 and all that but before I go into some more specific and some issues, and fixes, let me tell you about UNICODE, UTF-8 and how MySQL interprets it. See the blogpost linked to above for more information on the subject, surprisingly even more boring, on Collations.

So, let's begin with UNICODE. UNICODE …

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Adding a case insensitive, distinct unicode collation
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Every once in a while questions like the one in MySQL Bug #60843 or Bug #19567 come up:

What collation should i use if i want case insensitive behavior but also want all accented letter to be treated as distinct to their base letters?

or shorter, as the reporter of bug #60843 put it:

I need something like utf8_bin + ci

utf8_general_ci and utf8_unicode_ci unfortunately do not provide this behavior and utf8_bin is obviously not case insensitive.

…  [Read more...]
Guidelines for generating XML
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Over the last little while I've come across quite a few XML feed generators written in PHP, with varying degrees of 'correctness'. Even though generating XML should be very simple, there's still quite a bit of pitfalls I feel every PHP or (insert your language)-developer should know about.

1. You are better off using an XML library

This is the first and foremost rule. Most people end up generating their xml using simple string concatenation, while there are many dedicated tools out there that really help you generate your own XML.

In PHP land the best example is …

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Unicode coming to PHP 6
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The move from PHP 5 to PHP 6 will be a painful one. But once it’s done, I hope that it will be easier to handle safe web development for a global, multi-language internet. After all these years, we still … Continue reading →

Showing entries 1 to 7

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