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SET sql_mode=ORACLE;
SELECT DECODE(10);
ERROR 42000: Incorrect parameter count in the call to native function 'DECODE'
SELECT DECODE(10,10);
ERROR 42000: Incorrect parameter count in the call to native function 'DECODE'
SELECT DECODE(10,10,'x10');
DECODE(10,10,'x10')
x10
SELECT DECODE(11,10,'x10');
DECODE(11,10,'x10')
NULL
SELECT DECODE(10,10,'x10','def');
DECODE(10,10,'x10','def')
x10
SELECT DECODE(11,10,'x10','def');
DECODE(11,10,'x10','def')
def
SELECT DECODE(10,10,'x10',11,'x11','def');
DECODE(10,10,'x10',11,'x11','def')
x10
SELECT DECODE(11,10,'x10',11,'x11','def');
DECODE(11,10,'x10',11,'x11','def')
x11
SELECT DECODE(12,10,'x10',11,'x11','def');
DECODE(12,10,'x10',11,'x11','def')
def
EXPLAIN EXTENDED SELECT DECODE(12,10,'x10',11,'x11','def');
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select decode(12,10,'x10',11,'x11','def') AS "DECODE(12,10,'x10',11,'x11','def')"
CREATE TABLE decode (decode int);
DROP TABLE decode;
#
# MDEV-13863 sql_mode=ORACLE: DECODE does not treat two NULLs as equivalent
#
SELECT DECODE(10);
ERROR 42000: Incorrect parameter count in the call to native function 'DECODE'
SELECT DECODE(10,10);
ERROR 42000: Incorrect parameter count in the call to native function 'DECODE'
SELECT DECODE_ORACLE(10);
ERROR 42000: Incorrect parameter count in the call to native function 'DECODE_ORACLE'
SELECT DECODE_ORACLE(10,10);
ERROR 42000: Incorrect parameter count in the call to native function 'DECODE_ORACLE'
EXPLAIN EXTENDED SELECT DECODE(12,10,'x10',11,'x11');
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select decode(12,10,'x10',11,'x11') AS "DECODE(12,10,'x10',11,'x11')"
EXPLAIN EXTENDED SELECT DECODE(12,10,'x10',11,'x11','def');
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select decode(12,10,'x10',11,'x11','def') AS "DECODE(12,10,'x10',11,'x11','def')"
EXPLAIN EXTENDED SELECT DECODE_ORACLE(12,10,'x10',11,'x11');
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select decode(12,10,'x10',11,'x11') AS "DECODE_ORACLE(12,10,'x10',11,'x11')"
EXPLAIN EXTENDED SELECT DECODE_ORACLE(12,10,'x10',11,'x11','def');
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select decode(12,10,'x10',11,'x11','def') AS "DECODE_ORACLE(12,10,'x10',11,'x11','def')"
CREATE TABLE t1 (a INT);
CREATE VIEW v1 AS
SELECT
DECODE(a,1,'x1',NULL,'xNULL') AS d1,
DECODE(a,1,'x1',NULL,'xNULL','xELSE') AS d2,
DECODE_ORACLE(a,1,'x1',NULL,'xNULL') AS d3,
DECODE_ORACLE(a,1,'x1',NULL,'xNULL','xELSE') AS d4
FROM t1;
SHOW CREATE VIEW v1;
View Create View character_set_client collation_connection
v1 CREATE VIEW "v1" AS select decode("t1"."a",1,'x1',NULL,'xNULL') AS "d1",decode("t1"."a",1,'x1',NULL,'xNULL','xELSE') AS "d2",decode("t1"."a",1,'x1',NULL,'xNULL') AS "d3",decode("t1"."a",1,'x1',NULL,'xNULL','xELSE') AS "d4" from "t1" latin1 latin1_swedish_ci
DROP VIEW v1;
DROP TABLE t1;
SELECT DECODE(TIME'10:20:31','10:20:31','then1','10:20:32','then2','def');
DECODE(TIME'10:20:31','10:20:31','then1','10:20:32','then2','def')
then1
SELECT DECODE(TIME'10:20:32','10:20:31','then1','10:20:32','then2','def');
DECODE(TIME'10:20:32','10:20:31','then1','10:20:32','then2','def')
then2
SELECT DECODE(TIME'10:20:33','10:20:31','then1',NULL,'then2NULL','10:20:33','then3','def');
DECODE(TIME'10:20:33','10:20:31','then1',NULL,'then2NULL','10:20:33','then3','def')
then3
SELECT DECODE(NULL,TIME'10:20:31','then1',NULL,'then2NULL','10:20:33','then3','def');
DECODE(NULL,TIME'10:20:31','then1',NULL,'then2NULL','10:20:33','then3','def')
then2NULL
SELECT DECODE(TIMESTAMP'2001-01-01 10:20:31','2001-01-01 10:20:31','then1','2001-01-01 10:20:32','then2','def');
DECODE(TIMESTAMP'2001-01-01 10:20:31','2001-01-01 10:20:31','then1','2001-01-01 10:20:32','then2','def')
then1
SELECT DECODE(TIMESTAMP'2001-01-01 10:20:32','2001-01-01 10:20:31','then1','2001-01-01 10:20:32','then2','def');
DECODE(TIMESTAMP'2001-01-01 10:20:32','2001-01-01 10:20:31','then1','2001-01-01 10:20:32','then2','def')
then2
SELECT DECODE(TIMESTAMP'2001-01-01 10:20:33','2001-01-01 10:20:31','then1',NULL,'then2NULL','2001-01-01 10:20:33','then3','def');
DECODE(TIMESTAMP'2001-01-01 10:20:33','2001-01-01 10:20:31','then1',NULL,'then2NULL','2001-01-01 10:20:33','then3','def')
then3
SELECT DECODE(NULL,TIMESTAMP'2001-01-01 10:20:31','then1',NULL,'then2NULL','2001-01-01 10:20:33','then3','def');
DECODE(NULL,TIMESTAMP'2001-01-01 10:20:31','then1',NULL,'then2NULL','2001-01-01 10:20:33','then3','def')
then2NULL
SELECT DECODE('w1','w1','then1','w2','then2','def');
DECODE('w1','w1','then1','w2','then2','def')
then1
SELECT DECODE('w2','w1','then1','w2','then2','def');
DECODE('w2','w1','then1','w2','then2','def')
then2
SELECT DECODE('w3','w1','then1',NULL,'then2NULL','w3','then3','def');
DECODE('w3','w1','then1',NULL,'then2NULL','w3','then3','def')
then3
SELECT DECODE(NULL,'w1','then1',NULL,'then2NULL','w3','then3','def');
DECODE(NULL,'w1','then1',NULL,'then2NULL','w3','then3','def')
then2NULL
SELECT DECODE(1,1,'then1',2,'then2','def');
DECODE(1,1,'then1',2,'then2','def')
then1
SELECT DECODE(2,1,'then1',2,'then2','def');
DECODE(2,1,'then1',2,'then2','def')
then2
SELECT DECODE(3,1,'then1',NULL,'then2NULL',3,'then3','def');
DECODE(3,1,'then1',NULL,'then2NULL',3,'then3','def')
then3
SELECT DECODE(NULL,1,'then1',NULL,'then2NULL',3,'then3','def');
DECODE(NULL,1,'then1',NULL,'then2NULL',3,'then3','def')
then2NULL
SELECT DECODE(CAST(NULL AS SIGNED),1,'then1',NULL,'then2NULL',3,'then3','def');
DECODE(CAST(NULL AS SIGNED),1,'then1',NULL,'then2NULL',3,'then3','def')
then2NULL
SELECT DECODE(1.0,1.0,'then1',2.0,'then2','def');
DECODE(1.0,1.0,'then1',2.0,'then2','def')
then1
SELECT DECODE(2.0,1.0,'then1',2.0,'then2','def');
DECODE(2.0,1.0,'then1',2.0,'then2','def')
then2
SELECT DECODE(3.0,1.0,'then1',NULL,'then2NULL',3.0,'then3','def');
DECODE(3.0,1.0,'then1',NULL,'then2NULL',3.0,'then3','def')
then3
SELECT DECODE(NULL,1.0,'then1',NULL,'then2NULL',3.0,'then3','def');
DECODE(NULL,1.0,'then1',NULL,'then2NULL',3.0,'then3','def')
then2NULL
SELECT DECODE(CAST(NULL AS DECIMAL),1.0,'then1',NULL,'then2NULL',3.0,'then3','def');
DECODE(CAST(NULL AS DECIMAL),1.0,'then1',NULL,'then2NULL',3.0,'then3','def')
then2NULL
SELECT DECODE(1e0,1e0,'then1',2e0,'then2','def');
DECODE(1e0,1e0,'then1',2e0,'then2','def')
then1
SELECT DECODE(2e0,1e0,'then1',2e0,'then2','def');
DECODE(2e0,1e0,'then1',2e0,'then2','def')
then2
SELECT DECODE(3e0,1e0,'then1',NULL,'then2NULL',3e0,'then3','def');
DECODE(3e0,1e0,'then1',NULL,'then2NULL',3e0,'then3','def')
then3
SELECT DECODE(NULL,1e0,'then1',NULL,'then2NULL',3e0,'then3','def');
DECODE(NULL,1e0,'then1',NULL,'then2NULL',3e0,'then3','def')
then2NULL
SELECT DECODE(CAST(NULL AS DOUBLE),1e0,'then1',NULL,'then2NULL',3e0,'then3','def');
DECODE(CAST(NULL AS DOUBLE),1e0,'then1',NULL,'then2NULL',3e0,'then3','def')
then2NULL
SELECT DECODE(NULL,NULL,1,2) FROM DUAL;
DECODE(NULL,NULL,1,2)
1
SELECT DECODE(NULL,10,10,NULL,1,2) FROM DUAL;
DECODE(NULL,10,10,NULL,1,2)
1
SELECT DECODE_ORACLE(NULL,NULL,1,2) FROM DUAL;
DECODE_ORACLE(NULL,NULL,1,2)
1
SELECT DECODE_ORACLE(NULL,10,10,NULL,1,2) FROM DUAL;
DECODE_ORACLE(NULL,10,10,NULL,1,2)
1
CREATE OR REPLACE TABLE t1 (a VARCHAR(10) DEFAULT NULL);
INSERT INTO t1 VALUES (NULL),(1);
SELECT a, DECODE(a,NULL,1,2) FROM t1;
a DECODE(a,NULL,1,2)
NULL 1
1 2
DROP TABLE t1;
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