Bug 12430414 - THE TEST PERFSCHEMA.SELECTS.TEST CAN AFFECT SUCCEEDING TESTS
Bug 12430599 - THE TEST PERFSCHEMA.ONE_THREAD_PER_CON. CAN AFFECT SUCCEEDING TESTS
Bug 12431153 - THE TEST PERFSCHEMA.PFS_UPGRADE CAN AFFECT SUCCEEDING TEST
Before this fix, the performance schema tables were defined in UPPERCASE.
This was incompatible with the lowercase_table_names option, and caused
issues with the install / upgrade process, when changing the lower case
table names setting *after* the install or upgrade.
With this fix, all performance schema tables are exposed with lowercase names.
As a result, the name of the performance schema table is always lowercase,
no matter how / if / when the lowercase_table_names setting if changed.
This change is to align the 5.5 performance_schema.THREADS
table definition with the 5.6 performance_schema.THREADS table,
to facilitate the 5.5 -> 5.6 migration later.
In the table performance_schema.THREADS:
- renamed ID to PROCESSLIST_ID, removed not null
- changed NAME from varchar(64) to varchar(128)
to match the columns definitions from 5.6
Adjusted the test cases accordingly.
Note: this fix is for 5.5 only, to null merge into 5.6
The reason for the bug above is unclear but
- Modify pfs_upgrade so that it's result is easier to analyze in case something fails
- Fix several minor weaknesses which could cause that a successing test (either an
already existing or a to be developed one) fails because of imperfect cleanup,
too slow disconnected sessions etc.
should either fix the bug or reduce it's probability or at least
make the analysis of failures easier.
