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SET sql_mode=ORACLE;
#
# MDEV-15739 - sql_mode=ORACLE: Make LPAD and RPAD return NULL instead of empty string
#
SELECT RPAD('a',0), RPAD('abc',1), RPAD('abc',2) ;
RPAD('a',0) RPAD('abc',1) RPAD('abc',2)
NULL a ab
SELECT RPAD('a',0,'.'), RPAD('abc',1,'.'), RPAD('abc',2,'.') ;
RPAD('a',0,'.') RPAD('abc',1,'.') RPAD('abc',2,'.')
NULL a ab
SELECT LPAD('a',0), LPAD('abc',1), LPAD('abc',2) ;
LPAD('a',0) LPAD('abc',1) LPAD('abc',2)
NULL a ab
SELECT LPAD('a',0,'.'), LPAD('abc',1,'.'), LPAD('abc',2,'.') ;
LPAD('a',0,'.') LPAD('abc',1,'.') LPAD('abc',2,'.')
NULL a ab
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;
LPAD(c1,c2,c3) LPAD(c1,c2)
NULL a
NULL NULL
NULL NULL
NULL NULL
NULL NULL
a a
.a a
SELECT RPAD(c1,c2,c3), RPAD(c1,c2) FROM t1 ORDER BY ord;
RPAD(c1,c2,c3) RPAD(c1,c2)
NULL a
NULL NULL
NULL NULL
NULL NULL
NULL NULL
a a
a. a
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;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 7 100.00 Using filesort
Warnings:
Note 1003 select rpad_oracle('a',0,'.') AS "RPAD('a',0,'.')",lpad_oracle('a',0,'.') AS "LPAD('a',0,'.')",lpad_oracle("test"."t1"."c1","test"."t1"."c2","test"."t1"."c3") AS "LPAD(c1,c2,c3)",lpad_oracle("test"."t1"."c1","test"."t1"."c2") AS "LPAD(c1,c2)",rpad_oracle("test"."t1"."c1","test"."t1"."c2","test"."t1"."c3") AS "RPAD(c1,c2,c3)",rpad_oracle("test"."t1"."c1","test"."t1"."c2") AS "RPAD(c1,c2)" from "test"."t1" order by "test"."t1"."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;
View Create View character_set_client collation_connection
v1 CREATE VIEW "v1" AS select rpad_oracle('a',0,'.') AS "C1",lpad_oracle('a',0,'.') AS "C2",lpad_oracle("t1"."c1","t1"."c2","t1"."c3") AS "C3",lpad_oracle("t1"."c1","t1"."c2") AS "C4",rpad_oracle("t1"."c1","t1"."c2","t1"."c3") AS "C5",rpad_oracle("t1"."c1","t1"."c2") AS "C6" from "t1" order by "t1"."ord" latin1 latin1_swedish_ci
SELECT * FROM v1;
C1 C2 C3 C4 C5 C6
NULL NULL NULL a NULL a
NULL NULL NULL NULL NULL NULL
NULL NULL NULL NULL NULL NULL
NULL NULL NULL NULL NULL NULL
NULL NULL NULL NULL NULL NULL
NULL NULL a a a a
NULL NULL .a a a. a
SELECT c1||'-'||c2||'-'||c3||'-'||c4||'-'||c5||'-'||c6 FROM v1;
c1||'-'||c2||'-'||c3||'-'||c4||'-'||c5||'-'||c6
---a--a
-----
-----
-----
-----
--a-a-a-a
--.a- a-a.-a
DROP VIEW v1;
DROP TABLE t1;
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