thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-09-20 08:40:50 +00:00
Code Issues Packages Projects Releases Wiki Activity

1. modify doc to add sha512

Browse Source
This commit is contained in:
listar 2021-08-19 10:03:44 +00:00
parent b5f0693471
commit 60b6afc629
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
docs/en/sql-reference/functions/hash-functions.md
View File

@ -143,7 +143,9 @@ It works faster than intHash32. Average quality.
## SHA256 {#sha256}
Calculates SHA-1, SHA-224, or SHA-256 from a string and returns the resulting set of bytes as FixedString(20), FixedString(28), or FixedString(32).
## SHA512 {#sha512}
Calculates SHA-1, SHA-224, SHA-256 or SHA-512 from a string and returns the resulting set of bytes as FixedString(20), FixedString(28), FixedString(32), or FixedString(64).
The function works fairly slowly (SHA-1 processes about 5 million short strings per second per processor core, while SHA-224 and SHA-256 process about 2.2 million).
We recommend using this function only in cases when you need a specific hash function and you can’t select it.
Even in these cases, we recommend applying the function offline and pre-calculating values when inserting them into the table, instead of applying it in SELECTS.