Example:
```sql
EXPLAIN TABLE OVERRIDE mysql('127.0.0.1:3306', 'db', 'table', 'user', 'pw')
PARTITION BY tuple(toYYYYMM(created), id % 8)
```
Validations done:
* check that storage overrides do not reference unknown or nullable columns
* check that default specifier is not modified for columns
This test uses predefined timestamps, and default retention.ms is too
small:
kafka1_1 | [2021-12-28 21:40:21,842] INFO Created log for partition virt2_0-0 in /var/lib/kafka/data with properties {compression.type -> producer, message.format.version -> 2.2-IV1, file.delete.delay.ms -> 60000, max.message.bytes -> 1000012, min.compaction.lag.ms -> 0, message.timestamp.type -> CreateTime, message.downconversion.enable -> true, min.insync.replicas -> 1, segment.jitter.ms -> 0, preallocate -> false, min.cleanable.dirty.ratio -> 0.5, index.interval.bytes -> 4096, unclean.leader.election.enable -> false, retention.bytes -> -1, delete.retention.ms -> 86400000, cleanup.policy -> [delete], flush.ms -> 9223372036854775807, segment.ms -> 604800000, segment.bytes -> 1073741824, retention.ms -> 604800000, message.timestamp.difference.max.ms -> 9223372036854775807, segment.index.bytes -> 10485760, flush.messages -> 9223372036854775807}. (kafka.log.LogManager)
kafka1_1 | [2021-12-28 21:40:24,540] INFO [Log partition=virt2_0-0, dir=/var/lib/kafka/data] Found deletable segments with base offsets [0] due to retention time 604800000ms breach (kafka.log.Log)
v2: fix tests with 0 timestamp_ms
and this should be all tests that was left:
$ fgrep 'Found deletable segments with base offsets' test_storage_kafka/_instances_0/docker.log
kafka1_1 | [2021-12-29 09:46:15,610] INFO [Log partition=avro1-0, dir=/var/lib/kafka/data] Found deletable segments with base offsets [0] due to retention time 604800000ms breach (kafka.log.Log)
kafka1_1 | [2021-12-29 09:51:15,609] INFO [Log partition=virt1-0, dir=/var/lib/kafka/data] Found deletable segments with base offsets [0] due to retention time 604800000ms breach (kafka.log.Log)
