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88 lines
2.8 KiB
Plaintext
88 lines
2.8 KiB
Plaintext
#
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# MDEV-14012 - sql_mode=Oracle: substr(): treat position 0 as position 1
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# MDEV-10574 - sql_mode=Oracle: return null instead of empty string
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#
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SET sql_mode=ORACLE;
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SELECT SUBSTR('abc',2,1),SUBSTR('abc',1,1), SUBSTR('abc',0,1) FROM dual;
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SUBSTR('abc',2,1) SUBSTR('abc',1,1) SUBSTR('abc',0,1)
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b a a
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SELECT SUBSTR('abc',2),SUBSTR('abc',1), SUBSTR('abc',0) FROM dual;
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SUBSTR('abc',2) SUBSTR('abc',1) SUBSTR('abc',0)
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bc abc abc
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SELECT SUBSTR(null,2,1),SUBSTR(null,1), SUBSTR(null,0) FROM dual;
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SUBSTR(null,2,1) SUBSTR(null,1) SUBSTR(null,0)
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NULL NULL NULL
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SELECT SUBSTR('abc',-2),SUBSTR('abc',-1), SUBSTR('abc',-0) FROM dual;
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SUBSTR('abc',-2) SUBSTR('abc',-1) SUBSTR('abc',-0)
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bc c abc
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SELECT SUBSTR('abc',-2,1),SUBSTR('abc',-1,1), SUBSTR('abc',-0,1) FROM dual;
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SUBSTR('abc',-2,1) SUBSTR('abc',-1,1) SUBSTR('abc',-0,1)
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b c a
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SELECT SUBSTR('abc',null) FROM dual;
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SUBSTR('abc',null)
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NULL
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SELECT SUBSTR('abc',2,null),SUBSTR('abc',1,null), SUBSTR('abc',0,null) FROM dual;
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SUBSTR('abc',2,null) SUBSTR('abc',1,null) SUBSTR('abc',0,null)
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NULL NULL NULL
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SELECT SUBSTR('abc',2,0),SUBSTR('abc',1,0), SUBSTR('abc',0,0) FROM dual;
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SUBSTR('abc',2,0) SUBSTR('abc',1,0) SUBSTR('abc',0,0)
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NULL NULL NULL
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SELECT SUBSTR('abc',2,-1),SUBSTR('abc',1,-1), SUBSTR('abc',0,-1) FROM dual;
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SUBSTR('abc',2,-1) SUBSTR('abc',1,-1) SUBSTR('abc',0,-1)
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NULL NULL NULL
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SELECT SUBSTR(SPACE(0),1) FROM DUAL;
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SUBSTR(SPACE(0),1)
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NULL
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CREATE TABLE t1 (c1 VARCHAR(10),start INTEGER, length INTEGER);
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INSERT INTO t1 VALUES ('abc', 1, 1);
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INSERT INTO t1 VALUES ('abc', 0, 1);
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INSERT INTO t1 VALUES (null, 1, 1);
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INSERT INTO t1 VALUES (null, 0, 1);
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INSERT INTO t1 VALUES ('abc', 1, 0);
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INSERT INTO t1 VALUES ('abc', 0, 0);
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INSERT INTO t1 VALUES (null, 1, 0);
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INSERT INTO t1 VALUES (null, 0, 0);
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INSERT INTO t1 VALUES ('abc', 1, -1);
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INSERT INTO t1 VALUES ('abc', 0, -1);
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INSERT INTO t1 VALUES (null, 1, -1);
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INSERT INTO t1 VALUES (null, 0, -1);
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INSERT INTO t1 VALUES (SPACE(0), 0, 1);
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SELECT SUBSTR(c1,start,length) FROM t1;
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SUBSTR(c1,start,length)
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a
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a
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NULL
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NULL
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NULL
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NULL
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NULL
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NULL
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NULL
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NULL
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NULL
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NULL
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NULL
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DROP TABLE t1;
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CREATE TABLE t1 (c1 VARCHAR(10) NOT NULL);
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CREATE TABLE t2 AS SELECT SUBSTR(C1,1,1) AS C1 from t1;
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SHOW CREATE TABLE t2;
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Table Create Table
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t2 CREATE TABLE "t2" (
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"C1" varchar(1) DEFAULT NULL
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)
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DROP TABLE t2;
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DROP TABLE t1;
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EXPLAIN EXTENDED SELECT SUBSTR('abc',2,1) ;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select substr_oracle('abc',2,1) AS "SUBSTR('abc',2,1)"
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CREATE VIEW v1 AS SELECT SUBSTR('abc',2,1) ;
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SHOW CREATE VIEW v1;
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View Create View character_set_client collation_connection
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v1 CREATE VIEW "v1" AS select substr_oracle('abc',2,1) AS "SUBSTR('abc',2,1)" latin1 latin1_swedish_ci
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SELECT * FROM v1;
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SUBSTR('abc',2,1)
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b
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DROP VIEW v1;
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