SET sql_mode=ORACLE;

--echo #
--echo # MDEV-15739 -  sql_mode=ORACLE: Make LPAD and RPAD return NULL instead of empty string
--echo #

SELECT RPAD('a',0), RPAD('abc',1), RPAD('abc',2) ;
SELECT RPAD('a',0,'.'), RPAD('abc',1,'.'), RPAD('abc',2,'.') ;
SELECT LPAD('a',0), LPAD('abc',1), LPAD('abc',2) ;
SELECT LPAD('a',0,'.'), LPAD('abc',1,'.'), LPAD('abc',2,'.') ;

CREATE TABLE t1 (c1 VARCHAR(10),c2 INTEGER, c3 VARCHAR(10), ord INTEGER);
INSERT INTO t1 VALUES ('a',1,null,1);
INSERT INTO t1 VALUES ('a',null,'.',2);
INSERT INTO t1 VALUES (null,1,'.',3);
INSERT INTO t1 VALUES ('a',-1,'.',4);
INSERT INTO t1 VALUES ('a',0,'.',5);
INSERT INTO t1 VALUES ('a',1,'.',6);
INSERT INTO t1 VALUES ('a',2,'.',7);

SELECT LPAD(c1,c2,c3), LPAD(c1,c2) FROM t1 ORDER BY ord;
SELECT RPAD(c1,c2,c3), RPAD(c1,c2) FROM t1 ORDER BY ord;

EXPLAIN EXTENDED SELECT RPAD('a',0,'.'), LPAD('a',0,'.'), LPAD(c1,c2,c3), LPAD(c1,c2), RPAD(c1,c2,c3), RPAD(c1,c2) FROM t1 ORDER BY ord;

CREATE VIEW v1 AS SELECT RPAD('a',0,'.') AS "C1", LPAD('a',0,'.') AS "C2", LPAD(c1,c2,c3) AS "C3", LPAD(c1,c2) AS "C4", RPAD(c1,c2,c3) AS "C5", RPAD(c1,c2) AS "C6" FROM t1 ORDER BY ord;
SHOW CREATE VIEW v1;
SELECT * FROM v1;
SELECT c1||'-'||c2||'-'||c3||'-'||c4||'-'||c5||'-'||c6 FROM v1;
DROP VIEW v1;
DROP TABLE t1;