utf8mb4

How to support emojis with flourish?

由 白昼怎懂夜的黑 提交于 2019-12-12 04:39:47
问题 I am using flourishlib for a website. My client requested that we should be able to use emojis with mobile phones. In theory we should change the character-encoding from utf8 to utf8mb4 for the MySQL database. So far, so good, however, if we make this switch, like this: # For each database: ALTER DATABASE database_name CHARACTER SET = utf8mb4 COLLATE utf8mb4_unicode_ci; # For each table: ALTER TABLE table_name CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; # For each column:

Issue when deploying mysql db (utf8mb4_unicode_520_ci -> utf8mb4_unicode_ci)

由 我的梦境 提交于 2019-12-12 04:35:06
问题 I started working on a wordpress on my dev machine. mysql version is 5.6, and worpdress is 4.7 so its already using the utf8mb4_unicode_520_ci encoding if it detects its possible. My problem is that on my hosting (mysql 5.5) utf8mb4_unicode_520_ci is not recognized as a valid encoding. So I'm trying to target utf8mb4_unicode_ci encoding as my hosting knows about this one, and if I understand correctly, this would - in opposition to going to utf8 - allow me to keep the 4 bytes. I tried several

ODBC connector support for utf8mb4 in MYSQL

由 戏子无情 提交于 2019-12-11 23:55:26
问题 I have been stuck up in this scenario. My application is in C++ which connects to MySQL database 5.5.34 through MySQL odbc connector v5.2 Unicode Driver. My tables were using the character set and collation properties 'utf-8'. To insert supplementary unicode characters, i changed it via My table was initially created: CREATE TABLE mytable (SAMPLECOLUMN text) ENGINE=InnoDB DEFAULTCHARSET=utf8; changed to, ALTER TABLE mytable CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; After

MySQL Table COLLATION utf8_turkish_ci To utf8_general_ci

由 自古美人都是妖i 提交于 2019-12-11 21:30:01
问题 I have 2 table and I want to do join those tables. But one table collation is utf8_turkish_ci another is utf8_general_ci . These tables are big (2.9GB / 550MB) So I don't want to use " COLLATION " keyword in query because it's decelerated to my query. My question is: if I change the table COLLATION from utf8_turkish_ci To utf8_general_ci so garble or change any character in rows? Thanks 回答1: Collation changing do not change characters. The collation is a rule (or rules) which say how to

django inspectdb utf8mb4 error

由 核能气质少年 提交于 2019-12-11 07:22:35
问题 Python manage.py inspectdb is giving following error even after all tables are having CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci from django.db import models Unable to inspect table 'execution' The error was: (3719, "3719: 'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.", None) 回答1: I encountered the exact same issue lately. I raised a bug request to Django, but Django

Changing MySQL charset to UTF8 on linux so it will work with JDBC

由 走远了吗. 提交于 2019-12-11 03:52:30
问题 My application can be deployed on Win\Linux, and uses MySQL 5.5, and it may store data in different languages. I changed my MySQL server to have the following charset variables set to UTF8: character_set_client character_set_connection character_set_connection character_set_database character_set_results character_set_server character_set_system To do so, I added the following to my.ini: [mysql] default-character-set=utf8 [mysqld] init_connect='SET collation_connection = utf8_unicode_ci' init

convert utf8mb4 characters to utf8 in php

由 ぐ巨炮叔叔 提交于 2019-12-10 23:37:51
问题 is there a way to convert utf8mb4 characters to utf8 to store in a utf8 mysql database? and then when we get it from database, restore it to utf8mb4. goal is storing phone smiley in a utf8 database without having to change database encoding. for example replace first byte of those characters to a special byte and then in restoration change it back? 回答1: ok what I did was using BLOB type for that column.. 来源： https://stackoverflow.com/questions/18273120/convert-utf8mb4-characters-to-utf8-in

Searching emoji from varchar column returns different record

由 好久不见. 提交于 2019-12-10 22:32:22
问题 I'm using MySQL5.6. The DB character set is utf8mb4. When I search emoji as below, I got unexpected results. mysql> SELECT id, hex(title) FROM tags WHERE title = 0xF09F9886; +-----+------------+ | id | hex(title) | +-----+------------+ | 165 | F09F9886 | | 166 | F09F9884 | +-----+------------+ It should return only id=165. Does anyone know this why? 回答1: I found how to fix it. It was a problem of collation. I used default collation value, I presume it's utf8mb4_general_ci . When I changed

How does InnoDB store character columns?

由 房东的猫 提交于 2019-12-08 07:33:39
问题 This Question addresses only how 'short' CHAR and VARCHAR columns are stored in an InnoDB table. Does a CHAR(10) column occupy exactly 10 bytes? What happens with trailing blanks? What about character sets that need more than 1 byte per character? How does VARCHAR(10) differ from CHAR(10) ? EXPLAIN implies that all indexed varchars contain a 2-byte length field. Is it really 2 bytes? Or might it be 1 byte? (cf key_len ). What about different ROW_FORMATs ? Not covered in this Question (to keep

How does InnoDB store character columns?

由 穿精又带淫゛_ 提交于 2019-12-07 15:12:27
This Question addresses only how 'short' CHAR and VARCHAR columns are stored in an InnoDB table. Does a CHAR(10) column occupy exactly 10 bytes? What happens with trailing blanks? What about character sets that need more than 1 byte per character? How does VARCHAR(10) differ from CHAR(10) ? EXPLAIN implies that all indexed varchars contain a 2-byte length field. Is it really 2 bytes? Or might it be 1 byte? (cf key_len ). What about different ROW_FORMATs ? Not covered in this Question (to keep it from being too broad): What about TEXT . What about 255, 191, off-page storage, etc. What happens
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