Yes, this is weird! But it nicely showcases that SQL is a programming language, which is the title of the seminar during which this work was done.
Overview: The directory code/ contains the implementation. In paper/, you'll find the LaTeX source of a short 4-page term paper on the topic. Finally, a Deckset-powered set of slides lives in presentation/.
Open code/index.html in your browser and draw a character as instructed. Ignore the "Working..." bit – setting up the server component, which runs the query on a background Postgres instance, can be a bit of a pain. Instead, copy the JSON value shown at the bottom of the page.
--\set pen '[ { "x": 37, "y": 31 }, { "x": 37, "y": 31 }, { "x": 37, "y": 34 }, { "x": 37, "y": 39 }, { "x": 38, "y": 43 }, { "x": 41, "y": 57 }, { "x": 44, "y": 66 }, { "x": 48, "y": 76 }, { "x": 52, "y": 86 }, { "x": 54, "y": 92 }, { "x": 56, "y": 96 }, { "x": 58, "y": 99 }, { "x": 59, "y": 101 }, { "x": 59, "y": 102 }, { "x": 60, "y": 102 }, { "x": 60, "y": 102 }, { "x": 60, "y": 101 }, { "x": 60, "y": 98 }, { "x": 61, "y": 90 }, { "x": 64, "y": 80 }, { "x": 65, "y": 73 }, { "x": 67, "y": 66 }, { "x": 69, "y": 60 }, { "x": 71, "y": 52 }, { "x": 72, "y": 49 }, { "x": 72, "y": 46 }, { "x": 73, "y": 44 }, { "x": 74, "y": 42 }, { "x": 74, "y": 41 }, { "x": 74, "y": 40 }, { "x": 74, "y": 40 }, { "x": 74, "y": 39 }, { "x": 74, "y": 39 }, { "x": 74, "y": 39 }, { "x": 74, "y": 39 }, { "x": 74, "y": 39 }, { "x": 74, "y": 39 }, { "x": 72, "y": 40 }, { "x": 67, "y": 43 }, { "x": 63, "y": 45 }, { "x": 60, "y": 47 }, { "x": 58, "y": 49 }, { "x": 56, "y": 50 }, { "x": 54, "y": 52 }, { "x": 52, "y": 52 }, { "x": 51, "y": 53 }, { "x": 50, "y": 54 }, { "x": 50, "y": 54 }, { "x": 50, "y": 54 }, { "x": 49, "y": 54 }, { "x": 49, "y": 54 }, { "x": 49, "y": 54 }, { "x": 49, "y": 54 }, { "x": 49, "y": 55 }, { "x": 49, "y": 55 }, { "x": 49, "y": 55 }, { "x": 48, "y": 55 }, { "x": 48, "y": 55 }, { "x": 48, "y": 55 }, { "x": 47, "y": 56 }, { "x": 46, "y": 56 }, { "x": 46, "y": 56 }, { "x": 46, "y": 56 }, { "x": 46, "y": 56 } ]'If everything went well, you have just found out which character you've drawn! (Ideally, it matches your intent...)