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db_create_mysql.sql: note for utf8mb4 (MySQL)

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git-svn-id: https://svn.fhem.de/fhem/trunk@27231 2b470e98-0d58-463d-a4d8-8e2adae1ed80
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nasseeder1 2023-02-15 20:08:04 +00:00
parent 75044dfe2d
commit d57e0b8313
1 changed files with 23 additions and 0 deletions
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fhem/contrib/dblog/db_create_mysql.sql
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@ -1,3 +1,26 @@
##################################################################################
# Note:
# =====
# The default installation of the MySQL/MariaDB database provides
# for the use of the <b>utf8_bin</b> collation.
# With this setting, characters up to 3 bytes long can be stored,
# which is generally sufficient for FHEM.
# However, if characters with a length of 4 bytes (e.g. emojis)
# are to be stored in the database, the utf8mb4
# character set must be used.
#
# in this case the MySQL/MariaDB database would be created with the
# following statement:
#
# CREATE DATABASE `fhem` DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_bin;
#
# instead of the statement:
#
# CREATE DATABASE `fhem` DEFAULT CHARACTER SET utf8 COLLATE utf8_bin;
#
# shown in the first line below.
#
##################################################################################
CREATE DATABASE `fhem` DEFAULT CHARACTER SET utf8 COLLATE utf8_bin;
CREATE USER 'fhemuser'@'%' IDENTIFIED BY 'fhempassword';
CREATE TABLE `fhem`.`history` (TIMESTAMP TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, DEVICE varchar(64), TYPE varchar(64), EVENT varchar(512), READING varchar(64), VALUE varchar(128), UNIT varchar(32));