Fixed bug #32533.

8bit escape characters, termination and enclosed characters
were silently ignored by SELECT INTO query, but LOAD DATA INFILE
algorithm is 8bit-clean, so data was corrupted during 
encoding.

mysql-test/r/outfile_loaddata.result

@@ -82,4 +82,22 @@ c1	c2
 -r-	=raker=
 DROP TABLE t2;
 DROP TABLE t1;
+#
+# Bug#32533: SELECT INTO OUTFILE never escapes multibyte character
+#
+CREATE TABLE t1 (c1 VARCHAR(256));
+INSERT INTO t1 VALUES (0xC3);
+SELECT HEX(c1) FROM t1;
+HEX(c1)
+C3
+SELECT * INTO OUTFILE 'MYSQLTEST_VARDIR/tmp/bug32533.txt' FIELDS ENCLOSED BY 0xC3 FROM t1;
+TRUNCATE t1;
+SELECT HEX(LOAD_FILE('MYSQLTEST_VARDIR/tmp/bug32533.txt'));
+HEX(LOAD_FILE('MYSQLTEST_VARDIR/tmp/bug32533.txt'))
+C35CC3C30A
+LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/bug32533.txt' INTO TABLE t1 FIELDS ENCLOSED BY 0xC3;
+SELECT HEX(c1) FROM t1;
+HEX(c1)
+C3
+DROP TABLE t1;
 # End of 5.0 tests.

mysql-test/t/outfile_loaddata.test

@@ -86,4 +86,28 @@ DROP TABLE t2;
 
 DROP TABLE t1;
 
+--echo #
+--echo # Bug#32533: SELECT INTO OUTFILE never escapes multibyte character
+--echo #
+
+CREATE TABLE t1 (c1 VARCHAR(256));
+INSERT INTO t1 VALUES (0xC3);
+SELECT HEX(c1) FROM t1;
+
+--let $file=$MYSQLTEST_VARDIR/tmp/bug32533.txt
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval SELECT * INTO OUTFILE '$file' FIELDS ENCLOSED BY 0xC3 FROM t1
+TRUNCATE t1;
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval SELECT HEX(LOAD_FILE('$file'))
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval LOAD DATA INFILE '$file' INTO TABLE t1 FIELDS ENCLOSED BY 0xC3
+SELECT HEX(c1) FROM t1;
+
+--remove_file $file
+DROP TABLE t1;
+
 --echo # End of 5.0 tests.

sql/sql_class.cc

@@ -1219,16 +1219,18 @@ select_export::prepare(List<Item> &list, SELECT_LEX_UNIT *u)
     }
   }
   field_term_length=exchange->field_term->length();
-  field_term_char= field_term_length ? (*exchange->field_term)[0] : INT_MAX;
+  field_term_char= field_term_length ?
+                   (int) (uchar) (*exchange->field_term)[0] : INT_MAX;
   if (!exchange->line_term->length())
     exchange->line_term=exchange->field_term;	// Use this if it exists
-  field_sep_char= (exchange->enclosed->length() ? (*exchange->enclosed)[0] :
-                   field_term_char);
-  escape_char=	(exchange->escaped->length() ? (*exchange->escaped)[0] : -1);
+  field_sep_char= (exchange->enclosed->length() ?
+                  (int) (uchar) (*exchange->enclosed)[0] : field_term_char);
+  escape_char=	(exchange->escaped->length() ?
+                (int) (uchar) (*exchange->escaped)[0] : -1);
   is_ambiguous_field_sep= test(strchr(ESCAPE_CHARS, field_sep_char));
   is_unsafe_field_sep= test(strchr(NUMERIC_CHARS, field_sep_char));
   line_sep_char= (exchange->line_term->length() ?
-		  (*exchange->line_term)[0] : INT_MAX);
+                 (int) (uchar) (*exchange->line_term)[0] : INT_MAX);
   if (!field_term_length)
     exchange->opt_enclosed=0;
   if (!exchange->enclosed->length())
@@ -1385,10 +1387,11 @@ bool select_export::send_data(List<Item> &items)
                Don't escape field_term_char by doubling - doubling is only
                valid for ENCLOSED BY characters:
               */
-              (enclosed || !is_ambiguous_field_term || *pos != field_term_char))
+              (enclosed || !is_ambiguous_field_term ||
+               (int) (uchar) *pos != field_term_char))
           {
 	    char tmp_buff[2];
-            tmp_buff[0]= ((int) *pos == field_sep_char &&
+            tmp_buff[0]= ((int) (uchar) *pos == field_sep_char &&
                           is_ambiguous_field_sep) ?
                           field_sep_char : escape_char;
 	    tmp_buff[1]= *pos ? *pos : '0';