Fixed bug #31663: if the FIELDS TERMINATED BY string

in the SELECT INTO OUTFILE clause starts with a special
character (one of n, t, r, b, 0, Z or N) and ENCLOSED BY
is empty, every occurrence of this character within a
field value is duplicated.

Duplication has been avoided.
New warning message has been added: "First character of
the FIELDS TERMINATED string is ambiguous; please use
non-optional and non-empty FIELDS ENCLOSED BY".


mysql-test/r/outfile_loaddata.result:
  BitKeeper file /home/uchum/work/bk/5.0-opt-31663/mysql-test/r/outfile_loaddata.result
  Added test case for bug #31663.
mysql-test/t/outfile_loaddata.test:
  BitKeeper file /home/uchum/work/bk/5.0-opt-31663/mysql-test/t/outfile_loaddata.test
  Added test case for bug #31663.
sql/sql_class.h:
  Fixed bug #31663.
  The select_export::is_ambiguous_field_term field has been added.
  This field is true if select_export::field_sep_char contains
  the first char of the FIELDS TERMINATED BY (ENCLOSED BY is empty),
  and items can contain this character.
  The select_export::field_term_char field has been added (first
  char of the FIELDS TERMINATED BY string or INT_MAX).
sql/sql_class.cc:
  Fixed bug #31663.
  The select_export::prepare method has been modified to calculate
  a value of the select_export::is_ambiguous_field_term field and
  to warn if this value is true.
  The select_export::send_data method has been modified to
  avoid escaping or duplication of the field_set_char if
  is_ambiguous_field_term is true.
sql/share/errmsg.txt:
  Fixed bug #31663.
  The ER_AMBIGUOUS_FIELD_TERM warning has been added.

1 files changed, 89 insertions, 0 deletions

diff --git a/mysql-test/t/outfile_loaddata.test b/mysql-test/t/outfile_loaddata.test
new file mode 100644
index 00000000000..2f6ac998b3d
--- /dev/null
+++ b/mysql-test/t/outfile_loaddata.test
@@ -0,0 +1,89 @@
+--disable_warnings
+DROP TABLE IF EXISTS t1, t2;
+--enable_warnings
+
+--echo #
+--echo # Bug#31663 FIELDS TERMINATED BY special character
+--echo #
+
+CREATE TABLE t1 (i1 int, i2 int, c1 VARCHAR(256), c2 VARCHAR(256));
+INSERT INTO t1 VALUES (101, 202, '-r-', '=raker=');
+
+--let $fields=*
+--let $clauses=FIELDS TERMINATED BY 'raker'
+--echo # $clauses, warning:
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval SELECT $fields INTO OUTFILE '$MYSQLTEST_VARDIR/tmp/bug31663.txt' $clauses FROM t1
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval SELECT LOAD_FILE('$MYSQLTEST_VARDIR/tmp/bug31663.txt')
+--eval CREATE TABLE t2 SELECT $fields FROM t1
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval LOAD DATA INFILE '$MYSQLTEST_VARDIR/tmp/bug31663.txt' INTO TABLE t2 $clauses
+--eval SELECT $fields FROM t2
+--remove_file $MYSQLTEST_VARDIR/tmp/bug31663.txt
+DROP TABLE t2;
+
+--let $fields=i1, i2
+--let $clauses=FIELDS TERMINATED BY 'r'
+--echo # Only numeric fields, $clauses, no warnings:
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval SELECT $fields INTO OUTFILE '$MYSQLTEST_VARDIR/tmp/bug31663.txt' $clauses FROM t1
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval SELECT LOAD_FILE('$MYSQLTEST_VARDIR/tmp/bug31663.txt')
+--eval CREATE TABLE t2 SELECT $fields FROM t1
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval LOAD DATA INFILE '$MYSQLTEST_VARDIR/tmp/bug31663.txt' INTO TABLE t2 $clauses
+--eval SELECT $fields FROM t2
+--remove_file $MYSQLTEST_VARDIR/tmp/bug31663.txt
+DROP TABLE t2;
+
+--let $fields=*
+--let $clauses=FIELDS TERMINATED BY '0'
+--echo # $clauses, warning:
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval SELECT $fields INTO OUTFILE '$MYSQLTEST_VARDIR/tmp/bug31663.txt' $clauses FROM t1
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval SELECT LOAD_FILE('$MYSQLTEST_VARDIR/tmp/bug31663.txt')
+--eval CREATE TABLE t2 SELECT $fields FROM t1
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval LOAD DATA INFILE '$MYSQLTEST_VARDIR/tmp/bug31663.txt' INTO TABLE t2 $clauses
+--eval SELECT $fields FROM t2
+--remove_file $MYSQLTEST_VARDIR/tmp/bug31663.txt
+DROP TABLE t2;
+
+--let $fields=*
+--let $clauses=FIELDS OPTIONALLY ENCLOSED BY '"' TERMINATED BY '0'
+--echo # $clauses, warning:
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval SELECT $fields INTO OUTFILE '$MYSQLTEST_VARDIR/tmp/bug31663.txt' $clauses FROM t1
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval SELECT LOAD_FILE('$MYSQLTEST_VARDIR/tmp/bug31663.txt')
+--eval CREATE TABLE t2 SELECT $fields FROM t1
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval LOAD DATA INFILE '$MYSQLTEST_VARDIR/tmp/bug31663.txt' INTO TABLE t2 $clauses
+--eval SELECT $fields FROM t2
+--remove_file $MYSQLTEST_VARDIR/tmp/bug31663.txt
+DROP TABLE t2;
+
+--let $fields=c1, c2
+--let $clauses=FIELDS OPTIONALLY ENCLOSED BY '"' TERMINATED BY '0'
+--echo # Only string fields, $clauses, no warnings:
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval SELECT $fields INTO OUTFILE '$MYSQLTEST_VARDIR/tmp/bug31663.txt' $clauses FROM t1
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval SELECT LOAD_FILE('$MYSQLTEST_VARDIR/tmp/bug31663.txt')
+--eval CREATE TABLE t2 SELECT $fields FROM t1
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--eval LOAD DATA INFILE '$MYSQLTEST_VARDIR/tmp/bug31663.txt' INTO TABLE t2 $clauses
+--eval SELECT $fields FROM t2
+--remove_file $MYSQLTEST_VARDIR/tmp/bug31663.txt
+DROP TABLE t2;
+
+DROP TABLE t1;
+
+--echo # End of 5.0 tests.