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81aeff2d2a
ClickHouse/docs/en/operations/table_engines
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Azat Khuzhin 81aeff2d2a Add _shard_num virtual column for the Distributed engine 
With JOIN from system.clusters one can figure out from which server data
came.

TODO:
- optimization to avoid communicating with unrelated shards (for queries
  like "AND _shard_num = n")
- fix aliases (see tests with serverError expected)

v0: AddingConstColumnBlockInputStream
v2: VirtualColumnUtils::rewriteEntityInAst
v3: fix remote(Distributed) by appending _shard_num only if has been requested
2019-11-06 15:26:12 +03:00
..
aggregatingmergetree.md DOCAPI-8530: Code blocks markup fix (#7060) 2019-09-23 18:31:46 +03:00
buffer.md DOCAPI-7459: EN review, RU translation for skip_unavailable_shards docs (#6996) 2019-11-05 22:15:54 +03:00
collapsingmergetree.md DOCAPI-8530: Code blocks markup fix (#7060) 2019-09-23 18:31:46 +03:00
custom_partitioning_key.md DOCAPI-8530: Code blocks markup fix (#7060) 2019-09-23 18:31:46 +03:00
dictionary.md DOCAPI-8530: Code blocks markup fix (#7060) 2019-09-23 18:31:46 +03:00
distributed.md Add _shard_num virtual column for the Distributed engine 2019-11-06 15:26:12 +03:00
external_data.md DOCAPI-8530: Code blocks markup fix (#7060) 2019-09-23 18:31:46 +03:00
file.md DOCAPI-8530: Code blocks markup fix (#7060) 2019-09-23 18:31:46 +03:00
graphitemergetree.md DOCAPI-8530: Code blocks markup fix (#7060) 2019-09-23 18:31:46 +03:00
hdfs.md Fixing links in docs (#7098) 2019-09-25 19:43:10 +03:00
index.md Merge pull request #6092 from yandex/globs-in-file-one-more-attempt 2019-09-05 23:05:37 +03:00
jdbc.md DOCAPI-8530: Code blocks markup fix (#7060) 2019-09-23 18:31:46 +03:00
join.md DOCAPI-8530: Code blocks markup fix (#7060) 2019-09-23 18:31:46 +03:00
kafka.md DOCAPI-8530: Code blocks markup fix (#7060) 2019-09-23 18:31:46 +03:00
log_family.md DOCAPI-7991: EN review, RU translation for the update of Log engines docs (#7040) 2019-09-24 02:55:50 +03:00
log.md Docapi 3818 stripe log (#4191) 2019-02-04 17:52:31 +03:00
materializedview.md WIP on docs (#3813) 2018-12-12 20:28:00 +03:00
memory.md WIP on docs/website (#3383) 2018-10-16 13:47:17 +03:00
merge.md DOCAPI-7443: Virtual columns docs update. (#6382) 2019-08-14 09:45:24 +03:00
mergetree.md DOCAPI-6422: EN review, RU translation. Docs for adaptive index granularity and some settings (#7381) 2019-11-06 08:24:33 +03:00
mysql.md Update mysql.md 2019-10-09 21:28:01 +03:00
null.md WIP on docs (#3813) 2018-12-12 20:28:00 +03:00
odbc.md DOCAPI-8530: Code blocks markup fix (#7060) 2019-09-23 18:31:46 +03:00
replacingmergetree.md Added missing [Primary Key expr] to syntax 2019-08-04 22:50:26 +03:00
replication.md Fix table_name and add a hint about db_name in zk_node 2019-05-24 14:50:35 +02:00
set.md WIP on docs/website (#3383) 2018-10-16 13:47:17 +03:00
stripelog.md DOCAPI-8530: Code blocks markup fix (#7060) 2019-09-23 18:31:46 +03:00
summingmergetree.md DOCAPI-8530: Code blocks markup fix (#7060) 2019-09-23 18:31:46 +03:00
tinylog.md DOCAPI-7991: EN review, RU translation for the update of Log engines docs (#7040) 2019-09-24 02:55:50 +03:00
url.md DOCAPI-8530: Code blocks markup fix (#7060) 2019-09-23 18:31:46 +03:00
versionedcollapsingmergetree.md DOCAPI-8530: Code blocks markup fix (#7060) 2019-09-23 18:31:46 +03:00
view.md Doc fixes: remove all anchors <a> (#3897) 2018-12-21 22:23:55 +03:00