All we need is an easy explanation of the problem, so here it is.
I have data in a table column like below:
host=0.0.0.0 port=5432 dbname=database_name user=pglogicaluser host=0.0.0.0 port=5432 dbname=database_name2 user=pglogicaluser
I want to write a query to get the database names only like below:
I could come up with something like:
select substring(column_name, '.+dbname=(.*)$') from table_name;
However, I couldn’t figure how to stop the extraction before the
user keyword starts.
How to solve :
I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.
you need to include a space after the regex group that acts as a delimiter to separate the user keyword from the text you want to match. To make the regex match in that case, an additional "any other character" is needed.
substring(column_name, '.+dbname=(.*) .*$')
Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂