Clickhouse: Modifying TTL on ReplicatedMergeTree does not seem to work

[iameugenejo]

Describe the bug
Modifying TTL on ReplicatedMergeTree

• does not work,
• does not show the added TTL option,
• or does not throw an error if it's not supported.

How to reproduce

• Which ClickHouse server version to use
  19.6.2.11

• Which interface to use, if matters
  clickhouse-client

• Non-default settings, if any
  n/a

• CREATE TABLE statements for all tables involved

CREATE TABLE test.repl1 (
    `dt` DateTime, 
    `test` Int64
) ENGINE = ReplicatedMergeTree('/clickhouse/tables/{layer}-{shard}/test.repl1', '{replica}') 
ORDER BY dt 
SETTINGS index_granularity = 8192;

• Sample data for all these tables, use clickhouse-obfuscator if necessary
  n/a
• Queries to run that lead to unexpected result

ALTER TABLE test.repl1 MODIFY TTL dt + INTERVAL 1 DAY;

Expected behavior
A clear and concise description of what you expected to happen.

SHOW CREATE TABLE test.repl1; should show TTL dt + toIntervalDay(1) but it doesn't.

Error message and/or stacktrace
If applicable, add screenshots to help explain your problem.
n/a

Additional context
Add any other context about the problem here.

[alexey-milovidov]

https://github.com/yandex/ClickHouse/pull/5539

[alexey-milovidov]

Fixed in master and will be available in next testing release within a day.