Nice! Thanks Josh. I'll commit it when I commit the other stuff (keeping you as author of course).
I see that your "netstat" table has different column names on macOS and Linux. I pondered that one. I can see arguments both ways. The principle of least surprise says give the user -- likely an administrator -- the names local to their system. In other words I think you're right. I just pushed a 'files' command. It only works on Linux currently. Linux's find has a nice '-printf' option, but for macOS I'll need to do 'find | xargs stat'. Julian On Tue, Jul 25, 2017 at 2:13 PM, Josh Elser <els...@apache.org> wrote: > Not sure how useful it is, but it's something! Wrote a little function to > wrap `vmstat` and got it working on OSX and linux. > > https://github.com/joshelser/calcite/commit/01980a96acab47be2692d188ece2a6fa6bec08ae > > Would be happy to see it land in Calcite, either with your commit, Julian, > or I can do it after. > > > On 7/25/17 11:32 AM, Josh Elser wrote: >> >> I (think?) I have some free time, so let me play around with this today :) >> >> On 7/25/17 3:13 AM, Julian Hyde wrote: >>> >>> I had an idea last week and implemented it quickly over the weekend. You >>> know how bash hackers write pipelines of operations like grep, sort, uniq, >>> sed? Those are basically relational operations, but the pipelines are >>> difficult to write because you’re dealing with space-separated strings. So, >>> my idea was to allow people to write the same pipelines using SQL. Which >>> meant making SQL easily available from the command line, and making the data >>> sources of those operations (shell commands such as du, ps, git log) >>> available as tables. >>> >>> I call this the OS adapter, and the script that launches SQL from the >>> command line is sqlsh. To find the 5 most prolific committers you’d type >>> >>> $ git log | grep Author: | sort | uniq -c | sort -nr | head -5 >>> >>> and now you can instead type >>> >>> $ ./sqlsh select author, count\(\*\) from git_commits group by 1 order by >>> 2 desc limit 5 >>> >>> and Calcite reads from the same data source and executes the query using >>> its operators. >>> >>> It’s ready to commit. Can someone please review >>> https://issues.apache.org/jira/browse/CALCITE-1896 >>> <https://issues.apache.org/jira/browse/CALCITE-1896>? >>> >>> It would be great to get contributions to this. Adding new data sources >>> (/etc/passwd, netstat, the file system, apt, the maven repo) should be >>> fairly straightforward. >>> >>> Julian >>> >>> >>> >>> >
