-- Evergreen DB patch 0556.unnest_biblio_extract_metabib_field_entry.sql -- -- Replace usage of custom explode_array() function with native unnest() -- BEGIN; -- check whether patch can be applied SELECT evergreen.upgrade_deps_block_check('0556', :eg_version); CREATE OR REPLACE FUNCTION biblio.extract_metabib_field_entry ( rid BIGINT, default_joiner TEXT ) RETURNS SETOF metabib.field_entry_template AS $func$ DECLARE bib biblio.record_entry%ROWTYPE; idx config.metabib_field%ROWTYPE; xfrm config.xml_transform%ROWTYPE; prev_xfrm TEXT; transformed_xml TEXT; xml_node TEXT; xml_node_list TEXT[]; facet_text TEXT; raw_text TEXT; curr_text TEXT; joiner TEXT := default_joiner; -- XXX will index defs supply a joiner? output_row metabib.field_entry_template%ROWTYPE; BEGIN -- Get the record SELECT INTO bib * FROM biblio.record_entry WHERE id = rid; -- Loop over the indexing entries FOR idx IN SELECT * FROM config.metabib_field ORDER BY format LOOP SELECT INTO xfrm * from config.xml_transform WHERE name = idx.format; -- See if we can skip the XSLT ... it's expensive IF prev_xfrm IS NULL OR prev_xfrm <> xfrm.name THEN -- Can't skip the transform IF xfrm.xslt <> '---' THEN transformed_xml := oils_xslt_process(bib.marc,xfrm.xslt); ELSE transformed_xml := bib.marc; END IF; prev_xfrm := xfrm.name; END IF; xml_node_list := oils_xpath( idx.xpath, transformed_xml, ARRAY[ARRAY[xfrm.prefix, xfrm.namespace_uri]] ); raw_text := NULL; FOR xml_node IN SELECT x FROM unnest(xml_node_list) AS x LOOP CONTINUE WHEN xml_node !~ E'^\\s*<'; curr_text := ARRAY_TO_STRING( oils_xpath( '//text()', REGEXP_REPLACE( -- This escapes all &s not followed by "amp;". Data ise returned from oils_xpath (above) in UTF-8, not entity encoded REGEXP_REPLACE( -- This escapes embeded [^<]+)(<)([^>]+<)$re$, E'\\1<\\3', 'g' ), '&(?!amp;)', '&', 'g' ) ), ' ' ); CONTINUE WHEN curr_text IS NULL OR curr_text = ''; IF raw_text IS NOT NULL THEN raw_text := raw_text || joiner; END IF; raw_text := COALESCE(raw_text,'') || curr_text; -- insert raw node text for faceting IF idx.facet_field THEN IF idx.facet_xpath IS NOT NULL AND idx.facet_xpath <> '' THEN facet_text := oils_xpath_string( idx.facet_xpath, xml_node, joiner, ARRAY[ARRAY[xfrm.prefix, xfrm.namespace_uri]] ); ELSE facet_text := curr_text; END IF; output_row.field_class = idx.field_class; output_row.field = -1 * idx.id; output_row.source = rid; output_row.value = BTRIM(REGEXP_REPLACE(facet_text, E'\\s+', ' ', 'g')); RETURN NEXT output_row; END IF; END LOOP; CONTINUE WHEN raw_text IS NULL OR raw_text = ''; -- insert combined node text for searching IF idx.search_field THEN output_row.field_class = idx.field_class; output_row.field = idx.id; output_row.source = rid; output_row.value = BTRIM(REGEXP_REPLACE(raw_text, E'\\s+', ' ', 'g')); RETURN NEXT output_row; END IF; END LOOP; END; $func$ LANGUAGE PLPGSQL; COMMIT;