Fixed bug #29442.

The SELECT INTO OUTFILE FIELDS ENCLOSED BY digit or minus sign,
followed by the same LOAD DATA INFILE statement, used wrond encoding
of non-string fields contained the enclosed character in their text
representation.

Example:
  SELECT 15, 9 INTO OUTFILE 'text' FIELDS ENCLOSED BY '5';

Old encoded result in the text file:
  5155 595
         ^ was decoded as the 1st enclosing character of the 2nd field;
        ^ was skipped as garbage;
  ^    ^ was decoded as a pair of englosing characters of the 1st field;
      ^   was decoded as traling space of the first field;
    ^^ was decoded as a doubled enclosed character.

New encoded result in the text file:
  51\55 595
  ^   ^ pair of enclosing characters of the 1st field;
    ^^ escaped enclosed character.



sql/sql_class.h:
  Fixed bug #29442.
  The NUMERIC_CHARS macro constant has been defined to enumerate
  all possible characters of a numeric value text representation.
  The select_export::is_unsafe_field_sep boolean flag has been added
  to apply the encoding algorithm to non-string values when it is
  necessary.
sql/sql_class.cc:
  Fixed bug #29442.
  The select_export::send_data method has been modified to encode text
  representation of fields of all data types like string fields.
mysql-test/t/loaddata.test:
  Updated test case for bug #29442.
mysql-test/r/loaddata.result:
  Updated test case for bug #29442.

1 files changed, 25 insertions, 0 deletions

diff --git a/mysql-test/t/loaddata.test b/mysql-test/t/loaddata.test
index cdd3bb80b6e..260e760e7b3 100644
--- a/mysql-test/t/loaddata.test
+++ b/mysql-test/t/loaddata.test
@@ -213,4 +213,29 @@ select f1 from t1 where f2 <> '0000-00-00 00:00:00' order by f1;
 --exec rm $MYSQLTEST_VARDIR/tmp/t2
 drop table t1,t2;
 
+#
+# Bug#29442: SELECT INTO OUTFILE FIELDS ENCLOSED BY digit, minus sign etc
+#            corrupts non-string fields containing this character.
+#
+
+CREATE TABLE t1 (c1 INT, c2 TIMESTAMP, c3 REAL, c4 DOUBLE);
+
+INSERT INTO t1 (c1, c2, c3, c4) VALUES (10, '1970-02-01 01:02:03', 1.1E-100, 1.1E+100);
+SELECT * FROM t1;
+
+--exec rm -f $MYSQLTEST_VARDIR/tmp/t1
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+eval SELECT * INTO OUTFILE '$MYSQLTEST_VARDIR/tmp/t1' FIELDS ENCLOSED BY '-' FROM t1;
+--exec cat $MYSQLTEST_VARDIR/tmp/t1
+--exec echo EOF
+
+TRUNCATE t1;
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+eval LOAD DATA INFILE '$MYSQLTEST_VARDIR/tmp/t1' INTO TABLE t1 FIELDS ENCLOSED BY '-';
+SELECT * FROM t1;
+
+--exec rm $MYSQLTEST_VARDIR/tmp/t1
+DROP TABLE t1;
+
 # End of 5.0 tests