thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-11-25 17:12:03 +00:00
Code Issues Packages Projects Releases Wiki Activity

Update formats.md

Browse Source
This commit is contained in:
alexey-milovidov 2019-08-21 18:20:42 +03:00 committed by GitHub
parent ae81fb5ace
commit 51f6d97511
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
docs/en/interfaces/formats.md
View File

@ -146,7 +146,7 @@ SELECT * FROM t_null FORMAT TSKV
x=1 y=\N x=1 y=\N
``` ```
When there is a large number of small columns, this format is ineffective, and there is generally no reason to use it. It is used in some departments of Yandex. When there is a large number of small columns, this format is ineffective, and there is generally no reason to use it. Nevertheless, it is no worse than JSONEachRow in terms of efficiency.
Both data output and parsing are supported in this format. For parsing, any order is supported for the values of different columns. It is acceptable for some values to be omitted – they are treated as equal to their default values. In this case, zeros and blank rows are used as default values. Complex values that could be specified in the table are not supported as defaults. Both data output and parsing are supported in this format. For parsing, any order is supported for the values of different columns. It is acceptable for some values to be omitted – they are treated as equal to their default values. In this case, zeros and blank rows are used as default values. Complex values that could be specified in the table are not supported as defaults.