add missing upgrade script

Signed-off-by: Galen Charlton <gmc@esilibrary.com>

git-svn-id: svn://svn.open-ils.org/ILS/trunk@20044 dcc99617-32d9-48b4-a31d-7c20da2025e4

diff --git a/Open-ILS/src/sql/Pg/upgrade/0509.schema.better_maintain_901.sql b/Open-ILS/src/sql/Pg/upgrade/0509.schema.better_maintain_901.sql
new file mode 100644 (file)
index 0000000..6ae79e8
--- /dev/null
+++ b/Open-ILS/src/sql/Pg/upgrade/0509.schema.better_maintain_901.sql
@@ -0,0 +1,75 @@
+BEGIN;
+
+INSERT INTO config.upgrade_log (version) VALUES ('0509'); -- gmc
+
+CREATE OR REPLACE FUNCTION evergreen.xml_escape(str TEXT) RETURNS text AS $$
+    SELECT REPLACE(REPLACE(REPLACE($1,
+       '&', '&'),
+       '<', '&lt;'),
+       '>', '&gt;');
+$$ LANGUAGE SQL IMMUTABLE;
+
+CREATE OR REPLACE FUNCTION maintain_901 () RETURNS TRIGGER AS $func$
+DECLARE
+    use_id_for_tcn BOOLEAN;
+BEGIN
+    -- Remove any existing 901 fields before we insert the authoritative one
+    NEW.marc := REGEXP_REPLACE(NEW.marc, E'<datafield[^>]*?tag="901".+?</datafield>', '', 'g');
+
+    IF TG_TABLE_SCHEMA = 'biblio' THEN
+        -- Set TCN value to record ID?
+        SELECT enabled FROM config.global_flag INTO use_id_for_tcn
+            WHERE name = 'cat.bib.use_id_for_tcn';
+
+        IF use_id_for_tcn = 't' THEN
+            NEW.tcn_value := NEW.id;
+        END IF;
+
+        NEW.marc := REGEXP_REPLACE(
+            NEW.marc,
+            E'(</(?:[^:]*?:)?record>)',
+            E'<datafield tag="901" ind1=" " ind2=" ">' ||
+                '<subfield code="a">' || evergreen.xml_escape(NEW.tcn_value) || E'</subfield>' ||
+                '<subfield code="b">' || evergreen.xml_escape(NEW.tcn_source) || E'</subfield>' ||
+                '<subfield code="c">' || NEW.id || E'</subfield>' ||
+                '<subfield code="t">' || TG_TABLE_SCHEMA || E'</subfield>' ||
+                CASE WHEN NEW.owner IS NOT NULL THEN '<subfield code="o">' || NEW.owner || E'</subfield>' ELSE '' END ||
+                CASE WHEN NEW.share_depth IS NOT NULL THEN '<subfield code="d">' || NEW.share_depth || E'</subfield>' ELSE '' END ||
+             E'</datafield>\\1'
+        );
+    ELSIF TG_TABLE_SCHEMA = 'authority' THEN
+        NEW.marc := REGEXP_REPLACE(
+            NEW.marc,
+            E'(</(?:[^:]*?:)?record>)',
+            E'<datafield tag="901" ind1=" " ind2=" ">' ||
+                '<subfield code="c">' || NEW.id || E'</subfield>' ||
+                '<subfield code="t">' || TG_TABLE_SCHEMA || E'</subfield>' ||
+             E'</datafield>\\1'
+        );
+    ELSIF TG_TABLE_SCHEMA = 'serial' THEN
+        NEW.marc := REGEXP_REPLACE(
+            NEW.marc,
+            E'(</(?:[^:]*?:)?record>)',
+            E'<datafield tag="901" ind1=" " ind2=" ">' ||
+                '<subfield code="c">' || NEW.id || E'</subfield>' ||
+                '<subfield code="t">' || TG_TABLE_SCHEMA || E'</subfield>' ||
+                '<subfield code="o">' || NEW.owning_lib || E'</subfield>' ||
+                CASE WHEN NEW.record IS NOT NULL THEN '<subfield code="r">' || NEW.record || E'</subfield>' ELSE '' END ||
+             E'</datafield>\\1'
+        );
+    ELSE
+        NEW.marc := REGEXP_REPLACE(
+            NEW.marc,
+            E'(</(?:[^:]*?:)?record>)',
+            E'<datafield tag="901" ind1=" " ind2=" ">' ||
+                '<subfield code="c">' || NEW.id || E'</subfield>' ||
+                '<subfield code="t">' || TG_TABLE_SCHEMA || E'</subfield>' ||
+             E'</datafield>\\1'
+        );
+    END IF;
+
+    RETURN NEW;
+END;
+$func$ LANGUAGE PLPGSQL;
+
+COMMIT;