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content/posts/2024-04.md

@@ -79,4 +79,34 @@ return get.read().decode('utf-8')
 
 - It took ten or so minutes for it to finish (and note this is Python 2 inside OpenRefine so I had to be careful with Unicode), but worked well!
 
+## 2024-04-18
+
+- Write a SQL query to build the IFPRI CONTENTdm redirects to Handles:
+
+```sql
+SELECT m.text_value, h.handle FROM metadatavalue m JOIN handle h on m.dspace_object_id = h.resource_id WHERE m.metadata_field_id=28 AND m.text_value LIKE 'Original URL%' AND h.resource_type_id=2;
+```
+
+- Similarly, I need a SQL query to get the redirects for duplicate Handles, querying for `dcterms.replaces`:
+
+```sql
+SELECT m.text_value AS handle_from, h.handle AS handle_to FROM metadatavalue m JOIN handle h on m.dspace_object_id = h.resource_id WHERE m.metadata_field_id=181 AND h.resource_type_id=2;
+```
+
+- Then I can work that list into an nginx map with redirect, for example:
+
+```console
+server {
+...
+
+    if ($new_uri) {
+        return 301 $new_uri;
+    }
+}
+
+map $request_uri $new_uri {
+    /handle/10568/112821 /handle/10568/97605;
+}
+```
+
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