Supported cluster macros inside table function 'cluster'

[PolyProgrammist]

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Changelog category (leave one):

• New Feature

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):
Supported cluster macros inside table functions 'cluster' and 'clusterAllReplicas'

Detailed description / Documentation draft:

You can do this query:

create table test_db_o on cluster 'test_shard_localhost' (date DateTime, value UInt32) engine=MergeTree() order by date

And it's equivalent with macros (if there is a value 'cluster' -> 'test_shard_localhost' in system.macros):

create table test_db_a on cluster '{cluster}' (date DateTime, value UInt32) engine=MergeTree() order by date

Also you can call table functions cluster and clusterAllReplicas:

select * from cluster('test_shard_localhost', default.test_db_o)

However currently you cannot call it with cluster macros:

select * from cluster('{cluster}', default.test_db_4)`

The query gives an error:

Code: 170, e.displayText() = DB::Exception: Requested cluster '{cluster}' not found

The aim of this task is to allow to use cluster macros for table functions 'cluster' and 'clusterAllReplicas'

[ianton-ru]

LGTM

[alexey-milovidov]

Also add it to skip list of fast test: docker/test/fasttest/run.sh or add config there.

[PolyProgrammist]

Thank you.

Also add it to skip list of fast test: docker/test/fasttest/run.sh or add config there.

@alexey-milovidov could you please merge this pull request once you are ok with it?

I consulted with @tavplubix about the failed test 01099_operators_date_and_timestamp and he says it may be flapping.

[sevirov]

Internal documentation ticket: DOCSUP-12413