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BUG#16217 forced to introduce a separate mysql client command to adopt its

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internal charset to one associated with currently being handled query. 
To note such a query can come from interactive client either.

There was a discussion within replication team and Monty who's suggestion won.
It avoids straightforward parsing of all `set' queries that could affect client side 
character set. 
According to the idea, mysql client does not parse `set' queries but rather cares of
`charset new_cs_name' command.
This command is generated by mysqlbinlog in form of exclaiming comment (Lars' suggestion)
so that enlightened clients like `mysql' knows what to do with it.

Interactive human can switch between many multi-byte charsets during the session 
providing the command explicitly. 
To note that setting new internal mysql's charset does not
trigger sending any `SET' sql statement to the server.
This commit is contained in:
aelkin@mysql.com
2006-02-09 16:23:09 +02:00
parent 3b0dcb08a4
commit dd2a44c497
11 changed files with 139 additions and 3 deletions
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13
mysql-test/t/mysql.test
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@@ -41,3 +41,16 @@ lock tables t1 write;
unlock tables;
drop table t1;
#
# BUG#16217 - MySQL client misinterpretes multi-byte char as escape `\'
#
# new command \C or charset
--exec $MYSQL --default-character-set=utf8 test -e "\C cp932 \g"
--exec $MYSQL --default-character-set=cp932 test -e "charset utf8;"
# its usage to switch internally in mysql to requested charset
--exec $MYSQL --default-character-set=utf8 test -e "charset cp932; set @@session.character_set_client= cp932; select '<27>\'; create table t1 (c_cp932 TEXT CHARACTER SET cp932); insert into t1 values('<27>\'); select * from t1; drop table t1;"
--exec $MYSQL --default-character-set=utf8 test -e "charset cp932; set character_set_client= cp932; select '<27>\'"
--exec $MYSQL --default-character-set=utf8 test -e "/*charset cp932 */; set character_set_client= cp932; select '<27>\'"
--exec $MYSQL --default-character-set=utf8 test -e "/*!\C cp932 */; set character_set_client= cp932; select '<27>\'"