| Bug #6911 | resultset metadata always return client character set | ||
|---|---|---|---|
| Submitted: | 1 Dec 2004 9:31 | Modified: | 14 Dec 2004 12:04 |
| Reporter: | Georg Richter | Email Updates: | |
| Status: | Closed | Impact on me: | |
| Category: | MySQL Server | Severity: | S1 (Critical) |
| Version: | 4.1.x and 5.0.x | OS: | Any (all) |
| Assigned to: | Alexander Barkov | CPU Architecture: | Any |
[14 Dec 2004 12:04]
Alexander Barkov
Thank you for your bug report. This issue has been committed to our
source repository of that product and will be incorporated into the
next release.
If necessary, you can access the source repository and build the latest
available version, including the bugfix, yourself. More information
about accessing the source trees is available at
http://www.mysql.com/doc/en/Installing_source_tree.html
Additional info:
Fixed in 4.1.8
Description: When retrieving resultset metadata, charsetnr in fields always contain the client character set instead of the character set for the column in the database. This behaviour makes it impossible to determine the correct columnDisplaySize (a function which is used in most of the MySQL connectors). Output from test.c 1st) with client character set utf8 Charsetnr: 33 CharsetName: utf8 ColumnDisplaySize: 50 2nd) with client character set latin1 Charsetnr: 8 CharsetName: latin1 ColumnDisplaySize: 150 How to repeat: #include <my_global.h> #include <m_ctype.h> #include <mysql.h> #include <stdio.h> CHARSET_INFO *get_charset(uint, myf); main() { MYSQL *mysql; MYSQL_RES *result; CHARSET_INFO *cs; mysql = mysql_init(NULL); mysql_real_connect(mysql, "localhost", "root", "", "test", 0, NULL, 0); mysql_query(mysql, "DROP TABLE IF EXISTS t3"); mysql_query(mysql, "CREATE TABLE t3 (a varchar(50) character set utf8)"); mysql_query(mysql, "SELECT a FROM t3 WHERE 0=1"); result = mysql_store_result(mysql); cs = get_charset(result->fields[0].charsetnr, 0); printf("Charsetnr: %d\n", result->fields[0].charsetnr); printf("CharsetName: %s\n", cs->csname); printf("ColumnDisplaySize: %d\n", result->fields[0].length / cs->mbmaxlen); mysql_free_result(result); mysql_close(mysql); }