[英]Extact match the trimming_text in the rtrim function
If I run the following query in Postgres or Snowflake, it will remove test
from the end of the input string, even though the trimming text is best
:如果我在 Postgres 或 Snowflake 中运行以下查询,它将从输入字符串的末尾删除test
,即使修剪文本是best
的:
SELECT rtrim('rtrimtest', 'best');
See:看:
https://www.db-fiddle.com/f/kKYwe5tNLpVoacM2q1nJY7/0 https://www.db-fiddle.com/f/kKYwe5tNLpVoacM2q1nJY7/0
However, I need to rtrim to only remove if the trimming text is an exact match .但是,我需要 rtrim 以仅在修剪文本完全匹配时删除。 How do I do that?我怎么做?
The order of the characters doesn't matter for rtrim(). rtrim() 的字符顺序无关紧要。
rtrim('rtrimtest', 'best')
is the same as rtrim('rtrimtest', 'stbe')
rtrim('rtrimtest', 'best')
与rtrim('rtrimtest', 'stbe')
相同
On Postgres you can use regex_replace() for what you want to do:在 Postgres 上,你可以使用 regex_replace() 来做你想做的事情:
regexp_replace('rtrimtest', 'best$', '');
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