Convert the holdable_formats field on unfilled MR holds to the new style

Signed-off-by: Mike Rylander <mrylander@gmail.com>

diff --git a/Open-ILS/src/sql/Pg/upgrade/ZZZZ.schema.convert-MR-holdable_formats.sql b/Open-ILS/src/sql/Pg/upgrade/ZZZZ.schema.convert-MR-holdable_formats.sql
new file mode 100644 (file)
index 0000000..b2e4028
--- /dev/null
+++ b/Open-ILS/src/sql/Pg/upgrade/ZZZZ.schema.convert-MR-holdable_formats.sql
@@ -0,0 +1,39 @@
+
+BEGIN;
+
+-- First, explode the field into constituent parts
+WITH format_parts_array AS (
+    SELECT  a.id,
+            STRING_TO_ARRAY(a.holdable_formats, '-') AS parts
+      FROM  action.hold_request a
+      WHERE a.hold_type = 'M'
+            AND a.fulfillment_time IS NULL
+), format_parts_wide AS (
+    SELECT  id,
+            regexp_split_to_array(parts[1], '') AS item_type,
+            regexp_split_to_array(parts[2], '') AS item_form,
+            parts[3] AS item_lang
+      FROM  format_parts_array
+), converted_formats_flat AS (
+    SELECT  id, 
+            CASE WHEN ARRAY_LENGTH(item_type,1) > 0
+                THEN '"0":[{"_attr":"item_type","_val":"' || ARRAY_TO_STRING(item_type,'"},{"_attr":"item_type","_val":"') || '"}]'
+                ELSE '"0":""'
+            END AS item_type,
+            CASE WHEN ARRAY_LENGTH(item_form,1) > 0
+                THEN '"1":[{"_attr":"item_form","_val":"' || ARRAY_TO_STRING(item_form,'"},{"_attr":"item_form","_val":"') || '"}]'
+                ELSE '"1":""'
+            END AS item_form,
+            CASE WHEN item_lang <> ''
+                THEN '"2":[{"_attr":"item_lang","_val":"' || item_lang ||'"}]'
+                ELSE '"2":""'
+            END AS item_lang
+      FROM  format_parts_wide
+) UPDATE action.hold_request SET holdable_formats = '{' ||
+        converted_formats_flat.item_type || ',' ||
+        converted_formats_flat.item_form || ',' ||
+        converted_formats_flat.item_lang || '}'
+    FROM converted_formats_flat WHERE converted_formats_flat.id = action.hold_request.id;
+
+COMMIT;
+