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# Simple Select
- Simple Select is a less expressive but more ergonomic query language for
tabular data than SQL.
- `slx` is a command-line tool for querying CSVs using the Simple Select query
language.
Simple Select queries look like this: `director:"Tarantino" OR director:"Scorsese"`.
## Example
Say we have the following data in a CSV:
```csv
title,year,rating,director
"Spirited Away",2001,8.5,"Hayao Miyazaki"
Andhadhun,2018,8.1,"Sriram Raghavan"
Dangal,2016,8.3,"Sriram Raghavan"
"Avengers: Infinity War",2019,8.4,"Anthony Russo"
Alien,1979,8.4,"Ridley Scott"
...
```
We can invoke `slx` like so...
```
$ slx -f /tmp/movies.csv
```
...and then query using the REPL:
```
> director:/S.*m/ OR director:"Hayao"
Andhadhun 2018 8.1 1 Sriram Raghavan 0 1
Dangal 2016 8.3 1 Sriram Raghavan 0 1
Howls Moving Castle 2004 8.2 0 Hayao Miyazaki 1 1
Judgment at Nuremberg 1961 8.1 0 Stanley Kramer 0 0
Laputa: Castle in the Sky 1986 8.0 0 Hayao Miyazaki 1 1
Nausicaa of the Valley of the Wind 1984 8.0 0 Hayao Miyazaki 1 1
Network 1976 8.1 0 Sidney Lumet 0 0
```
## Warning
Simple Select is **not intended for production use**. I wrote this as a toy
project for my own consumption. There are quite a few bugs of which I'm aware
and quite a few other features that I'd like to support but haven't had time to
support just yet.
Why publish it then? Maybe this project will inspire drive-by contributions or
other, better-implemented spin-offs.
## Wish List
Speaking of drive-by contributions, here are some things that I'd like to
support:
- Implicit `AND` conjunctions (`director:/Tarantino/ year:"2000"` instead of
`director:/Tarantino/ AND year:"2000"`)
- Support for types like numbers, dates (`year:2000` instead of `year:"2000"`)
- `slx` should support CSV *and* (at the very least) sqlite3 file formats (open
to other formats as well)
- Regexes should be the default query primitive (`director:Tarantino` instead of
`director:/Tarantino/`)
- Improve parsing errors (including surfacing errors to the user)
- Support for reading from `STDIN` and issuing queries from the command-line
- Unit-testing
- Configurable delimiters for output data (right now it's just `\t`)
- (Maybe) rewrite in a faster, more-type-safe languages (e.g. Rust)
I'm likely missing other FRs, bugs, so please file issues!
|
