CREATE TABLE t1 (c1 longtext);
INSERT INTO t1 values ('a');
SELECT * FROM t1 INTO OUTFILE 'MYSQL_TMP_DIR/B11764517.tmp';
show global variables like 'secure_file_priv';
Variable_name	Value
secure_file_priv	MYSQL_TMP_DIR/
SELECT load_file('MYSQL_TMP_DIR\\B11764517.tmp') AS x;
x
a

SELECT load_file('MYSQL_TMP_DIR/B11764517.tmp') AS x;
x
a

SELECT load_file('MYSQL_TMP_DIR_UCASE/B11764517.tmp') AS x;
x
a

SELECT load_file('MYSQL_TMP_DIR_LCASE/B11764517.tmp') AS x;
x
a

SELECT load_file('MYSQL_TMP_DIR\\..a..\\..\\..\\B11764517.tmp') AS x;
x
NULL
LOAD DATA INFILE 'MYSQL_TMP_DIR\\B11764517.tmp' INTO TABLE t1;
LOAD DATA INFILE 'MYSQL_TMP_DIR/B11764517.tmp' INTO TABLE t1;
LOAD DATA INFILE 'MYSQL_TMP_DIR_UCASE/B11764517.tmp' INTO TABLE t1;
LOAD DATA INFILE 'MYSQL_TMP_DIR_LCASE/B11764517.tmp' INTO TABLE t1;
LOAD DATA INFILE "MYSQL_TMP_DIR\\..a..\\..\\..\\B11764517.tmp" into table t1;
ERROR HY000: The MariaDB server is running with the --secure-file-priv option so it cannot execute this statement
SELECT * FROM t1 INTO OUTFILE 'MYSQL_TMP_DIR\\..a..\\..\\..\\B11764517-2.tmp';
ERROR HY000: The MariaDB server is running with the --secure-file-priv option so it cannot execute this statement
SELECT * FROM t1 INTO OUTFILE 'MYSQL_TMP_DIR\\B11764517-2.tmp';
SELECT * FROM t1 INTO OUTFILE 'MYSQL_TMP_DIR/B11764517-3.tmp';
SELECT * FROM t1 INTO OUTFILE 'MYSQL_TMP_DIR_UCASE/B11764517-4.tmp';
SELECT * FROM t1 INTO OUTFILE 'MYSQL_TMP_DIR_LCASE/B11764517-5.tmp';
DROP TABLE t1;