1 -- Evergreen DB patch 0551.unnest_metabib_remap_metarecord_for_bib.sql
3 -- Replace usage of custom explode_array() function with native unnest()
7 -- check whether patch can be applied
8 SELECT evergreen.upgrade_deps_block_check('0551', :eg_version);
10 CREATE OR REPLACE FUNCTION metabib.remap_metarecord_for_bib( bib_id BIGINT, fp TEXT ) RETURNS BIGINT AS $func$
14 tmp_mr metabib.metarecord%ROWTYPE;
18 DELETE FROM metabib.metarecord_source_map WHERE source = bib_id; -- Rid ourselves of the search-estimate-killing linkage
20 FOR tmp_mr IN SELECT m.* FROM metabib.metarecord m JOIN metabib.metarecord_source_map s ON (s.metarecord = m.id) WHERE s.source = bib_id LOOP
22 IF old_mr IS NULL AND fp = tmp_mr.fingerprint THEN -- Find the first fingerprint-matching
25 SELECT COUNT(*) INTO source_count FROM metabib.metarecord_source_map WHERE metarecord = tmp_mr.id;
26 IF source_count = 0 THEN -- No other records
27 deleted_mrs := ARRAY_APPEND(deleted_mrs, tmp_mr.id);
28 DELETE FROM metabib.metarecord WHERE id = tmp_mr.id;
34 IF old_mr IS NULL THEN -- we found no suitable, preexisting MR based on old source maps
35 SELECT id INTO old_mr FROM metabib.metarecord WHERE fingerprint = fp; -- is there one for our current fingerprint?
36 IF old_mr IS NULL THEN -- nope, create one and grab its id
37 INSERT INTO metabib.metarecord ( fingerprint, master_record ) VALUES ( fp, bib_id );
38 SELECT id INTO old_mr FROM metabib.metarecord WHERE fingerprint = fp;
39 ELSE -- indeed there is. update it with a null cache and recalcualated master record
40 UPDATE metabib.metarecord
42 master_record = ( SELECT id FROM biblio.record_entry WHERE fingerprint = fp ORDER BY quality DESC LIMIT 1)
45 ELSE -- there was one we already attached to, update its mods cache and master_record
46 UPDATE metabib.metarecord
48 master_record = ( SELECT id FROM biblio.record_entry WHERE fingerprint = fp ORDER BY quality DESC LIMIT 1)
52 INSERT INTO metabib.metarecord_source_map (metarecord, source) VALUES (old_mr, bib_id); -- new source mapping
54 IF ARRAY_UPPER(deleted_mrs,1) > 0 THEN
55 UPDATE action.hold_request SET target = old_mr WHERE target IN ( SELECT unnest(deleted_mrs) ) AND hold_type = 'M'; -- if we had to delete any MRs above, make sure their holds are moved
61 $func$ LANGUAGE PLPGSQL;