25110801-229M

• Apache Parquet Dataset from a MySQL Database dump.

• Author's article.

• The Repository.

• One of the ongoing site. and video.

• Data cutoff: 251101 (it keeps updating as on 251108)

• I will update more contents when I think it is more appropriate. Sorry for no further elaboration.

• Carpe diem!

Contents inside

• parquet: Raw data exported from MySQL. Data tables only. Empty tables are absent.

• parquet_uuid: parquet with UUID for each row.

• parquet_fk: Foreign Keys linking 2 UUIDs under parquet_uuid.

• dump: "The riddle". This folder triggered HF and blocked by upload, so I used rename.

How to use

• Bring a Machine with 64GB 128GB of RAM. 64GB for parquet_*, 112GB for dump. However the original MySQL only takes 6GB for single user.

• Good luck guessing this riddle. However I think it is quite obvious if you know the theories well. It is just a bit abstract, general, and simple.

Future Plan

• Source code... I'll rename this repo when I really want to promote it. The (dataset) codes will be in Github. Server code is likely "never exist". See static. I made it pure frontend.

• Diagram of the dataset conversion are located in Github whatsever.

Hints on "the riddle"

• News article but not in English (0293).

• Another news article (0273).

//Need to flip all the "sholders_holder" first
MATCH (a:sholdings)-[rel:sholders_holder]->(b:persons)
WITH rel
CALL apoc.refactor.invert(rel)
YIELD input, output
RETURN output

//Enjoy
MATCH (v00:stocklistings{StockCode:'0273',StockExID:'1'})
WITH v00
CALL apoc.path.spanningTree(v00, {
    relationshipFilter: 'stocklistings_issue>|FK_issue_orgs>|FK_organisations_persons>|sholders_holder>|sholders_issue>'
})
YIELD path
WITH nodes(path) as list
CALL apoc.nodes.cycles(list, {
  relTypes: [
    "stocklistings_issue",
    "FK_issue_orgs",
    "FK_organisations_persons",
    "sholders_holder",
    "sholders_issue"
  ]
}) 
YIELD path AS p00
WITH p00, nodes(p00) AS v01
MATCH p01=(:stocklistings)-[stocklistings_issue]->()-[FK_issue_orgs]->(v02:organisations)
WHERE v02 IN v01
RETURN p00, p01 LIMIT 1000

Visualising / quick start for "the riddle"

• Host the entire static as a mini web server.

• Read codes and change the auth content (e.g. password).

• Use ?stockcode=0273&limit=1000 to change the query parameters.

• You will find that the code is suprisingly low. It is (really) abstract, general, and simple.