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Patch inspired by BUG#10491: Server returns data as charset

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binary SHOW CREATE TABLE or SELECT FROM I_S.

The problem is that mysqldump generates incorrect dump for a table
with non-ASCII column name if the mysqldump's character set is
ASCII.

The fix is to:
  1. Switch character_set_client for the mysqldump's connection
  to binary before issuing SHOW CREATE TABLE statement in order
  to avoid conversion.
  
  2. Dump switch character_set_client statements to UTF8 and back
  for CREATE TABLE statement.
This commit is contained in:
anozdrin/alik@ibm.
2007-07-25 19:46:50 +04:00
parent 20e7e9870a
commit 9f8593e81c
6 changed files with 329 additions and 3 deletions
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30
client/mysqldump.c
View File

@ -992,6 +992,21 @@ static int mysql_query_with_error_report(MYSQL *mysql_con, MYSQL_RES **res,
return 0;
}
static int switch_character_set_results(MYSQL *mysql, const char *cs_name)
{
char query_buffer[QUERY_LENGTH];
size_t query_length;
query_length= my_snprintf(query_buffer,
sizeof (query_buffer),
"SET SESSION character_set_results = '%s'",
(const char *) cs_name);
return mysql_real_query(mysql, query_buffer, query_length);
}
/*
Open a new .sql file to dump the table or view into
@ -1671,7 +1686,10 @@ static uint get_table_structure(char *table, char *db, char *table_type,
MYSQL_FIELD *field;
my_snprintf(buff, sizeof(buff), "show create table %s", result_table);
if (mysql_query_with_error_report(mysql, 0, buff))
if (switch_character_set_results(mysql, "binary") ||
mysql_query_with_error_report(mysql, &result, buff) ||
switch_character_set_results(mysql, default_charset))
DBUG_RETURN(0);
if (path)
@ -1702,7 +1720,6 @@ static uint get_table_structure(char *table, char *db, char *table_type,
check_io(sql_file);
}
result= mysql_store_result(mysql);
field= mysql_fetch_field_direct(result, 0);
if (strcmp(field->name, "View") == 0)
{
@ -1794,7 +1811,14 @@ static uint get_table_structure(char *table, char *db, char *table_type,
}
row= mysql_fetch_row(result);
fprintf(sql_file, "%s;\n", row[1]);
fprintf(sql_file,
"SET @saved_cs_client = @@character_set_client;\n"
"SET character_set_client = utf8;\n"
"%s;\n"
"SET character_set_client = @saved_cs_client;\n",
row[1]);
check_io(sql_file);
mysql_free_result(result);
}