Testing for MDEV-11371 (Big column compressed)

Development tasks: MDEV-11371, MDEV-11381
Development tree (as of July 18th): bb-10.3-svoj
Tentative patch (as of July 18th): https://github.com/MariaDB/server/commit/79e055f407d34f195e3fde20401f39033dfce51d

Request before the second round of review (received by email):

On Thu, Jun 29, 2017 at 12:22:15PM +0400, Sergey Vojtovich wrote:

Elena: I added decent test for this feature, but it would be great if you could
extend it, especially replication testing is missing.

Note: Since there is no documentation for the feature, need to explore first.
Note: Make sure it's documented before the release.
Note: Have 'innodb' removed from MDEV-11371 subject.

Initial exploration:

• server restart
• base for virt col
• storage for dyncol
• 2nd part of index
• change column, alter column
• views
• analyze, optimize, check
• create table .. select with unsupported engine haven't found an unsupported engine yet
• partitions, partition by compressed col
• timestamps, sets, enums (N/A)
• zerofill, unsigned (N/A)
• null/not null
• default
• charsets
• compressed column + row_format=compressed
• + table compressed
• + encryption
• aria, tokudb, rocksdb, connect, heap, federated
• binary log, replication
• mysqldump

–
here does not mean "tested", it just means it appears to be supported and does not fail right away

Extra MTR tests needed:

• with partitions
  • PARTITION BY KEY + SELECT .. WHERE col = 'something' etc. – crashes
• with binlog in row format (easy to check with replication)
  • some strange '\x00foo' shows up, length increases