UTF8 encoding using RMySQL

问题

I am trying to query data from a mysql database, which contains some strings, of course. For the connection and data retrieval I am using RMySQL in R, which works fine. Apart from one thing: the strings I am retrieving seem not to be in utf8. But I need this, because I have some german "Umlaute" in these strings. When I ask teh databse, which are its encoding by

dbGetQuery(db, "SHOW VARIABLES LIKE 'character_set_%';")

I get the desired answer:

             Variable_name           Value
1   character_set_client             utf8
2   character_set_connection         utf8
3   character_set_database           utf8
4   character_set_filesystem         binary
5    character_set_results           utf8
6     character_set_server           utf8
7     character_set_system           utf8
8       character_sets_dir C:\\Program Files\\MySQL\\MySQL Server 5.7\\share\\charsets\\

But e.g. I receive

Andreas WÃ¼nsche

instead of

Andreas Wünsche

Hope that somebody knows how to deal with it. If additonal information is needed, just ask. I can provide it.

回答1:

I find something a bit tricky but works for me :

you have to manually define the col of your data frame to utf-8 like this :

x <- "WÃ¼nsche"
Encoding(x) <- "UTF-8"
x
[1] "Wünsche"

Think you have to do this to all your strings vector

EDIT :

Take a look here
seems to fix the same problem by adding 'set character set "utf8"'inside the dbSendQuery()

回答2:

When trying to use utf8/utf8mb4, if you see Mojibake, check the following. This discussion also applies to Double Encoding, which is not necessarily visible.

The bytes to be stored need to be utf8-encoded.
The connection when INSERTing and SELECTing text needs to specify utf8 or utf8mb4.
The column needs to be declared CHARACTER SET utf8 (or utf8mb4).
HTML should start with <meta charset=UTF-8>.

来源：https://stackoverflow.com/questions/38347348/utf8-encoding-using-rmysql

标签

mysql

utf-8

rmysql