Property datatypes on Wikidata

This query is marked as a draft This query has been published by Lucas Werkmeister (WMDE).

Due to T166227, users can create properties with invalid datatypes on Wikidata. This query checks if anyone has actually done that.

SQL

USE `wikidatawiki_p`;

# which pi_types exist in the database?
SELECT `pi_type` FROM `wb_property_info` GROUP BY `pi_type`;

# which types are inside pi_info in the database?
SELECT `pi_info` FROM `wb_property_info` GROUP BY `pi_info`;
# download this result set as TSV and pipe it into:
# tail -n+2 | sed 's|\r$||; s|^"\(.*\)"$|\1|; s|""|"|g' | jq -r .type | sort | uniq -c | sort -nr

# result: there don’t seem to be any property types in the database other than the expected twelve.

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