The following headers are pretty generic, so use forward declaration as
much as possible:
- Context.h
- Settings.h
- ConnectionTimeouts.h
(Also this shows that some missing some includes -- this has been fixed)
And split ConnectionTimeouts.h into ConnectionTimeoutsContext.h (since
module part cannot be added for it, due to recursive build dependencies
that will be introduced)
Also remove Settings from the RemoteBlockInputStream/RemoteQueryExecutor
and just pass the context, since settings was passed only in speicifc
places, that can allow making a copy of Context (i.e. Copier).
Approx results (How much units will be recompiled after changing file X?):
- ConnectionTimeouts.h
- mainline: 100
- Context.h:
- mainline: ~800
- patched: 415
- Settings.h:
- mainline: 900-1K
- patched: 440 (most of them because of the Context.h)
Accept the usual user settings related to file formats.
Most of the diff are the mechanistic code changes required to allow
providing the required FormatSettings to the format factory. The File
engine then extracts these settings from the `CREATE` query, and specifies
them when creating the format parser.
- Fix PrettyCompactMonoBlock for clickhouse-local (broken in 20.3+,
fails with an error `Unknown format PrettyCompactMonoBlock`, after #6239)
- Fix extremes/totals with PrettyCompactMonoBlock (even before 20.3
breakage they were simply ignored)
