Part 5: EAV Schema Migration — Magento's Biggest Trap
← Previous Chapter: Part 4: gRPC Internal + REST Gateway | Series Hub | Next Chapter: Part 6: Phase 1 — Strangler Fig Read-Only → Answer-first: Escaping Magento’s complex Entity-Attribute-Value (EAV) structure requires extracting data through dynamic pivot SQL statements, mapping integer IDs to UUIDs, and restructuring into a normalized relational schema in PostgreSQL to optimize query performance. The EAV schema is the reason most Magento migration projects fail. From the outside, it looks easy to handle: product data is shredded across catalog_product_entity, catalog_product_entity_varchar, catalog_product_entity_int, catalog_product_entity_decimal, catalog_product_entity_datetime, and catalog_product_entity_text. Six tables — write a simple ETL job, get it done over a weekend. ...