Reproducible bug, leading to results SOME bad (with unit test)

Hi all

Please see this test unit http://jumpshare.com/b/Y7naM9 (sorry, not possible to attach files here).
What I get is the following. As you can see the result is different to SELECT EVEN though I created the two indices. This is definitely a serious error!

The implementation plans for the two selects are:
(1) without a clue: http://i.imgur.com/uCLoc.png
(2) with indices: http://i.imgur.com/RNruC.png
BANNER                                                                         
--------------------------------------------------------------------------------
Oracle Database 11g Express Edition Release 11.2.0.2.0 - Production              
PL/SQL Release 11.2.0.2.0 - Production                                           
CORE     11.2.0.2.0     Production                                                         
TNS for 32-bit Windows: Version 11.2.0.2.0 - Production                          
NLSRTL Version 11.2.0.2.0 - Production                                           

view V dropped.
table T dropped.
materialized view MV dropped.
table C dropped.
table C created.
1 rows inserted.
table T created.
1 rows inserted.
1 rows inserted.
1 rows inserted.
1 rows inserted.
1 rows inserted.
1 rows inserted.
1 rows inserted.
1 rows inserted.
1 rows inserted.
.........many rows
committed.
materialized view MV created.
view V created.
  COUNT(*)
----------
       190 
 
index MV_ZIPCODE_ZIPCODE created.
index MV_ZIPCODE_LOCALITY_COUNTRY created.
  COUNT(*)
----------
         0
Could you please say what's not here?

Thank you
Blama

Published by: Laurent January 9, 2013 15:25

Yes, I can reproduce it on 11.2.0.2.0:

SQL> SELECT banner FROM v$version;

BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
PL/SQL Release 11.2.0.2.0 - Production
CORE    11.2.0.2.0      Production
TNS for HPUX: Version 11.2.0.2.0 - Production
NLSRTL Version 11.2.0.2.0 - Production

SQL> DROP VIEW V;
DROP VIEW V
*
ERROR at line 1:
ORA-00942: table or view does not exist

SQL> DROP TABLE T;
DROP TABLE T
           *
ERROR at line 1:
ORA-00942: table or view does not exist

SQL> DROP TABLE C;
DROP TABLE C
           *
ERROR at line 1:
ORA-00942: table or view does not exist

SQL>
SQL> CREATE TABLE C
  2     ( ID NUMBER(*,0),
  3   SHORTNAME_DE VARCHAR2(40 CHAR)); 

Table created.

SQL> INSERT INTO C (ID,SHORTNAME_DE) values (1,'d');

1 row created.

SQL>
SQL> CREATE TABLE T
  2     ( ZIP_CODE VARCHAR2(10 BYTE),
  3   COUNTRY VARCHAR2(100 BYTE),
  4   LOCALITY VARCHAR2(100 BYTE),
  5   SUB_LOCALITY VARCHAR2(100 BYTE)
  6  );

Table created.

SQL>
SQL> Insert into T (ZIP_CODE,COUNTRY,LOCALITY,SUB_LOCALITY) values ('01','d','AA',null);

1 row created.

SQL> Insert into T (ZIP_CODE,COUNTRY,LOCALITY,SUB_LOCALITY) values ('02','d','BB',null);

1 row created.

SQL> Insert into T (ZIP_CODE,COUNTRY,LOCALITY,SUB_LOCALITY) values ('03','d','CC',null);

1 row created.

SQL> Insert into T (ZIP_CODE,COUNTRY,LOCALITY,SUB_LOCALITY) values ('04','d','DD',null);

1 row created.

SQL> Insert into T (ZIP_CODE,COUNTRY,LOCALITY,SUB_LOCALITY) values ('05','d','EE',null);

1 row created.

SQL> Insert into T (ZIP_CODE,COUNTRY,LOCALITY,SUB_LOCALITY) values ('06','d','FF',null);

1 row created.

SQL> Insert into T (ZIP_CODE,COUNTRY,LOCALITY,SUB_LOCALITY) values ('07','d','GG',null);

1 row created.

SQL> Insert into T (ZIP_CODE,COUNTRY,LOCALITY,SUB_LOCALITY) values ('08','d','HH',null);

1 row created.

SQL> Insert into T (ZIP_CODE,COUNTRY,LOCALITY,SUB_LOCALITY) values ('09','d','II',null);

1 row created.

SQL> Insert into T (ZIP_CODE,COUNTRY,LOCALITY,SUB_LOCALITY) values ('10','d','JJ',null);

1 row created.

SQL> Insert into T (ZIP_CODE,COUNTRY,LOCALITY,SUB_LOCALITY) values ('11','d','KK',null);

1 row created.

SQL> Insert into T (ZIP_CODE,COUNTRY,LOCALITY,SUB_LOCALITY) values ('12','d','LL',null);

1 row created.

SQL> Insert into T (ZIP_CODE,COUNTRY,LOCALITY,SUB_LOCALITY) values ('13','d','MM',null);

1 row created.

SQL> Insert into T (ZIP_CODE,COUNTRY,LOCALITY,SUB_LOCALITY) values ('14','d','NN',null);

1 row created.

SQL> Insert into T (ZIP_CODE,COUNTRY,LOCALITY,SUB_LOCALITY) values ('15','d','OO',null);

1 row created.

SQL> INSERT INTO T SELECT * FROM T;

15 rows created.

SQL> INSERT INTO T SELECT * FROM T;

30 rows created.

SQL> INSERT INTO T SELECT * FROM T;

60 rows created.

SQL> INSERT INTO T SELECT * FROM T;

120 rows created.

SQL> INSERT INTO T SELECT * FROM T;

240 rows created.

SQL> INSERT INTO T SELECT * FROM T;

480 rows created.

SQL> INSERT INTO T SELECT * FROM T;

960 rows created.

SQL> INSERT INTO T SELECT * FROM T;

1920 rows created.

SQL> INSERT INTO T SELECT * FROM T;

3840 rows created.

SQL> INSERT INTO T SELECT * FROM T;

7680 rows created.

SQL> INSERT INTO T SELECT * FROM T;

15360 rows created.

SQL> INSERT INTO T SELECT * FROM T;

30720 rows created.

SQL> INSERT INTO T SELECT * FROM T;

61440 rows created.

SQL> COMMIT;

Commit complete.

SQL>
SQL> CREATE OR REPLACE VIEW v AS
  2    SELECT c.id      AS country_id,
  3    c.shortname_de AS country_shortname_de,
  4    t.zip_code   AS zipcode,
  5    NVL(t.locality, t.sub_locality) ortsvorschlag
  6  FROM t
  7  LEFT OUTER JOIN c
  8  ON t.country = c.shortname_de
  9      WITH READ ONLY;

View created.

SQL>
SQL> SELECT COUNT(*) FROM v WHERE
  2      (
  3      ZIPCODE LIKE 'B%' ESCAPE'\'
  4      AND ZIPCODE IS NOT NULL
  5      )
  6      OR
  7      (
  8      ORTSVORSCHLAG like 'B%'
  9      AND ORTSVORSCHLAG IS NOT NULL
 10      )
 11      ;

  COUNT(*)
----------
      8192

SQL>
SQL>  CREATE INDEX t_zipcode_zipcode ON t
  2      (zip_code
  3      ) ;

Index created.

SQL>  CREATE INDEX t_zipcode_locality_country ON t
  2      (NVL(locality, sub_locality), country
  3      ) ;

Index created.

SQL> --DROP INDEX t_zipcode_zipcode;
SQL> --DROP INDEX t_zipcode_locality_country;
SQL>
SQL> SELECT COUNT(*) FROM v WHERE
  2      (
  3      ZIPCODE LIKE 'B%' ESCAPE'\'
  4      AND ZIPCODE IS NOT NULL
  5      )
  6      OR
  7      (
  8      ORTSVORSCHLAG like 'B%'
  9      AND ORTSVORSCHLAG IS NOT NULL
 10      )
 11      ;

  COUNT(*)
----------
         0

SQL>

And it's index t_zipcode_zipcode creating the issue. Looks like a bug, so search MetaLink or / and open SR.

SY.

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