PROBLEMS
Description:- Server variable "--lower_case_tables_names"
when set to "0" on windows platform which does not support
case sensitive file operations leads to problems. A warning
message is printed in the error log while starting the
server with "--lower_case_tables_names=0". Also according to
the documentation, seting "lower_case_tables_names" to "0"
on a case-insensitive filesystem might lead to index
corruption.
Analysis:- The problem reported in the bug is:-
Creating an INNODB table 'a' and executing a query, "INSERT
INTO a SELECT a FROM A;" on a server started with
"--lower_case_tables_names=0" and running on a
case-insensitive filesystem leads innodb to flat spin.
Optimizer thinks that "a" and "A" are two different tables
as the variable "lower_case_table_names" is set to "0". As a
result, optimizer comes up with a plan which does not need a
temporary table. If the same table is used in select and
insert, a temporary table is needed. This incorrect
optimizer plan leads to infinite insertions.
Fix:- If the server is started with
"--lower_case_tables_names" set to 0 on a case-insensitive
filesystem, an error, "The server option
'lower_case_table_names'is configured to use case sensitive
table names but the data directory is on a case-insensitive
file system which is an unsupported combination. Please
consider either using a case sensitive file system for your
data directory or switching to a case-insensitive table name
mode.", is printed in the server error log and the server
exits.
Bug#28563 Test suite "jp" fails completely
- The main goal of this fix is to make the "jp" suite runnable in general
and to make it more robust for use in pushbuild under build team conditions.
- It was decided to fix the remaining heavy issues within the
architecture of this test later
(-> WL 4327 Redesign the 'jp' testsuite for build team testing conditions)
Only the test jp_trim_sjis got some significant improvements of its
architecture (Just as proof of concept for the other tests).
- Tests suffering from
Bug 36597 Testsuite "jp": Suspicious results for some tests
(unexpected result sets)
were disabled
- *.opt files were used to avoid differences on OS (Windows) because of
case sensitive tablenames within the tests
I have put the tests into a separate "suite", the first one actually.
Currently this can only be run by the Perl version of mysql-test-run
that is not quite finished. It should, or at least will, be able to
be run with the line
./mysql-test-run.pl --suite=jp
