Fix Empty Subjects in MySQL

SDM-TIB / SDM-RDFizer

An Efficient RML-Compliant Engine for Knowledge Graph Construction

https://doi.org/10.5281/zenodo.3872103

Apache License 2.0

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Fix Empty Subjects in MySQL #108

Closed prohde closed 10 months ago

prohde commented 10 months ago

This PR fixes an issue when the source to be semantified is a MySQL database and the column used in the subjectMap includes NULL values. No triples are (to be) generated in that case.