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Bug#19978: INSERT .. ON DUPLICATE erroneously reports some records were

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updated.

INSERT ... ON DUPLICATE KEY UPDATE reports that a record was updated when
the duplicate key occurs even if the record wasn't actually changed
because the update values are the same as those in the record.

Now the compare_record() function is used to check whether the record was
changed and the update of a record reported only if the record differs
from the original one.


sql/sql_update.cc:
  Bug#19978: INSERT .. ON DUPLICATE erroneously reports some records were
  updated.
  The compare_record() function was changed to non-static one.
sql/sql_insert.cc:
  Bug#19978: INSERT .. ON DUPLICATE erroneously reports some records were
  updated.
  Now the compare_record() function is used to check whether the record was
  changed and the update of a record reported only if the record differs
  from the original one.
sql/mysql_priv.h:
  Bug#19978: INSERT .. ON DUPLICATE erroneously reports some records were
  updated.
  Added the prototype of the compare_record() function.
mysql-test/t/insert_select.test:
  Added a test case for bug#19978: INSERT .. ON DUPLICATE erroneously reports
  some records were updated.
mysql-test/r/insert_select.result:
  Added a test case for bug#19978: INSERT .. ON DUPLICATE erroneously reports
  some records were updated.
This commit is contained in:
unknown 2007-02-07 00:46:03 +03:00
commit 976f0a391c
5 changed files with 43 additions and 11 deletions
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13
mysql-test/t/insert_select.test
View file

@ -265,4 +265,17 @@ INSERT INTO bug21774_2.t1 SELECT t1.* FROM t1;
DROP DATABASE bug21774_1;
DROP DATABASE bug21774_2;
USE test;
#
# Bug#19978: INSERT .. ON DUPLICATE erroneously reports some records were
# updated.
#
create table t1(f1 int primary key, f2 int);
--enable_info
insert into t1 values (1,1);
insert into t1 values (1,1) on duplicate key update f2=1;
insert into t1 values (1,1) on duplicate key update f2=2;
--disable_info
select * from t1;
drop table t1;