The proposed plugin (Koha::Plugin::HKS3::NormalizeMARC2DB) aims to normalize MARC21 XML metadata from the biblio_metadata.metadata table into structured MySQL database tables. Currently, MARC21 XML is stored as a single XML blob, making advanced querying, reporting, and integration difficult. This plugin introduces an automatic normalization step triggered by the after_biblio_action hook whenever metadata is added or modified. It splits MARC XML into normalized relational tables fully supporting repeatable fields, subfields, and indicators. Advantages: Significantly simplifies complex querying and reporting of MARC21 data. Enhances data integrity and consistency. Facilitates integration with external reporting tools, analytics, and applications. Improves database performance for MARC metadata queries. Provides clear and structured access to MARC data elements. This approach aligns with best practices for database normalization and can substantially enhance Koha's extensibility and interoperability.
please checkout - install via kpz, and read instruction (you have to "run tool") https://github.com/HKS3/koha-normalize-marc2db https://github.com/HKS3/koha-normalize-marc2db/releases
I feel like this can get easily lost in bugzilla as it's not in the queues for testing. Adding some parties that might be interested in testing.