A glorified query-builder inspired by Datomic that uses a datalog-like format for querying and modifying information around a SQLite database.
This is a pet project and probably shouldn't be used for anything serious.
This is implemented as a rust library. It is documented, you can read the source or maybe find the documentation published on docs.rs.
There are two rust executable targets. One provides a command-line-interface (as shown below) and another can be used for importing data from a csv file.
Compile this with cargo build using --features cli --bin cli.
The CLI can be used to initialize new database files, assert/create, retract/remove, or query information.
Here are some examples:
```json $ echo '[{":db/attribute": ":pet/name"}, {":pet/name": "Garfield"}, {":pet/name": "Odie"}, {":pet/name": "Spot"}, {":db/attribute": ":person/name"}, {":db/attribute": ":person/starship"}, {":person/name": "Jon Arbuckle"}, {":person/name": "Lieutenant Commander Data", ":person/starship": "USS Enterprise (NCC-1701-D)"}]' \ | owoof assert [ "#45e9d8e9-51ea-47e6-8172-fc8179f8fbb7", "#4aa95e29-8d45-470b-98a7-ee39aae1b9c9", "#2450b9e6-71a4-4311-b93e-3920eebb2c06", "#c544251c-a279-4809-b9b6-7d3cd68d2f2c", "#19a4cba1-6fc7-4904-ad36-e8502445412f", "#f1bf032d-b036-4633-b6f1-78664e44603c", "#e7ecd66e-222f-44bc-9932-c778aa26d6ea", "#af32cfdb-b0f1-4bbc-830f-1eb83e4380a3" ]
$ echo '[{":db/attribute": ":pet/owner"}, {":db/id": "#4aa95e29-8d45-470b-98a7-ee39aae1b9c9", ":pet/owner": "#e7ecd66e-222f-44bc-9932-c778aa26d6ea"}, {":db/id": "#2450b9e6-71a4-4311-b93e-3920eebb2c06", ":pet/owner": "#e7ecd66e-222f-44bc-9932-c778aa26d6ea"}, {":db/id": "#c544251c-a279-4809-b9b6-7d3cd68d2f2c", ":pet/owner": "#af32cfdb-b0f1-4bbc-830f-1eb83e4380a3"}]' \ | owoof assert [ "#ffc46ae2-1bde-4c08-bfea-09db8241aa2b", "#4aa95e29-8d45-470b-98a7-ee39aae1b9c9", "#2450b9e6-71a4-4311-b93e-3920eebb2c06", "#c544251c-a279-4809-b9b6-7d3cd68d2f2c" ]
$ owoof '?pet :pet/owner ?owner' \ --show '?pet :pet/name' \ --show '?owner :person/name' [ [ { ":pet/name": "Garfield" }, { ":person/name": "Jon Arbuckle" } ], [ { ":pet/name": "Odie" }, { ":person/name": "Jon Arbuckle" } ], [ { ":pet/name": "Spot" }, { ":person/name": "Lieutenant Commander Data" } ] ]
$ owoof '?person :person/starship "USS Enterprise (NCC-1701-D)"' \ '?pet :pet/owner ?person' \ '?pet :pet/name ?n' [ "Spot" ]
```
Imported from the goodbooks-10k dataset.
json
$ owoof '?r :rating/score 1' \
'?r :rating/book ?b' \
'?b :book/authors "Dan Brown"' \
--show '?r :rating/user' \
--show '?b :book/title' \
--limit 5
[
[
{ ":rating/user": 9 },
{ ":book/title": "Angels & Demons (Robert Langdon, #1)" }
],
[
{ ":rating/user": 58 },
{ ":book/title": "The Da Vinci Code (Robert Langdon, #2)" }
],
[
{ ":rating/user": 65 },
{ ":book/title": "The Da Vinci Code (Robert Langdon, #2)" }
],
[
{ ":rating/user": 80 },
{ ":book/title": "The Da Vinci Code (Robert Langdon, #2)" }
],
[
{ ":rating/user": 89 },
{ ":book/title": "The Da Vinci Code (Robert Langdon, #2)" }
]
]
Testing is not extensive at this point.
The schema should be enforced, so no deleting attributes that are in use, but I haven't done the work to verify this so there might be some surprises.
Performance is not super reliable.
Version 0.2 adds partial indexes over specific attributes and has helped a lot with search performance. However, there is no index on values. Some queries are impacted by this more than others, so performance is not reliable.
The difficulty currently with a values index is that SQLite's query planner will prefer it in cases where it shouldn't. It isn't a good index and should be a last-resort -- it's also huge.
This is not feature-rich yet, constraints ensure equality and no support for constraints over ranges or involving logical operations exist yet and honestly I haven't tested how well it will perform with the schema changes made in 0.2.
owoof-csv needs a way to remap ids, so instead :rating/book joining with :book/id
it joins to :db/id.
Actually address the csv import id remap above.
Create DontWoof off the Connection.
The Select borrowing Network is a bit weird. I tried to split it off but it was still weird. Not sure what to do about that. One consideration is that pushing a Select on to a Query only borrows from the network. Maybe this could be relaxed?
Test reference counting? Add a clean-up that removes soups with zero rc and runs pragma optimize.
Maybe add some sort of update thing to shorthand retract & assert?
My blog post associated with version 0.1 this software: https://froghat.ca/blag/dont-woof
This is licensed under Apache License, Version 2.0.