END;
$func$ LANGUAGE PLPGSQL;
+CREATE OR REPLACE FUNCTION metabib.staged_browse(
+ query TEXT,
+ fields INT[],
+ context_org INT,
+ context_locations INT[],
+ staff BOOL,
+ browse_superpage_size INT,
+ count_up_from_zero BOOL, -- if false, count down from -1
+ result_limit INT,
+ next_pivot_pos INT
+) RETURNS SETOF metabib.flat_browse_entry_appearance AS $p$
+DECLARE
+ curs REFCURSOR;
+ rec RECORD;
+ qpfts_query TEXT;
+ aqpfts_query TEXT;
+ afields INT[];
+ bfields INT[];
+ result_row metabib.flat_browse_entry_appearance%ROWTYPE;
+ results_skipped INT := 0;
+ row_counter INT := 0;
+ row_number INT;
+ slice_start INT;
+ slice_end INT;
+ full_end INT;
+ all_records BIGINT[];
+ all_brecords BIGINT[];
+ all_arecords BIGINT[];
+ superpage_of_records BIGINT[];
+ superpage_size INT;
+BEGIN
+ IF count_up_from_zero THEN
+ row_number := 0;
+ ELSE
+ row_number := -1;
+ END IF;
+
+ OPEN curs FOR EXECUTE query;
+
+ LOOP
+ FETCH curs INTO rec;
+ IF NOT FOUND THEN
+ IF result_row.pivot_point IS NOT NULL THEN
+ RETURN NEXT result_row;
+ END IF;
+ RETURN;
+ END IF;
+
+
+ -- Gather aggregate data based on the MBE row we're looking at now, authority axis
+ SELECT INTO all_arecords, result_row.sees, afields
+ ARRAY_AGG(DISTINCT abl.bib), -- bibs to check for visibility
+ STRING_AGG(DISTINCT aal.source::TEXT, $$,$$), -- authority record ids
+ ARRAY_AGG(DISTINCT map.metabib_field) -- authority-tag-linked CMF rows
+
+ FROM metabib.browse_entry_simple_heading_map mbeshm
+ JOIN authority.simple_heading ash ON ( mbeshm.simple_heading = ash.id )
+ JOIN authority.authority_linking aal ON ( ash.record = aal.source )
+ JOIN authority.bib_linking abl ON ( aal.target = abl.authority )
+ JOIN authority.control_set_auth_field_metabib_field_map_refs map ON (
+ ash.atag = map.authority_field
+ AND map.metabib_field = ANY(fields)
+ )
+ WHERE mbeshm.entry = rec.id;
+
+
+ -- Gather aggregate data based on the MBE row we're looking at now, bib axis
+ SELECT INTO all_brecords, result_row.authorities, bfields
+ ARRAY_AGG(DISTINCT source),
+ STRING_AGG(DISTINCT authority::TEXT, $$,$$),
+ ARRAY_AGG(DISTINCT def)
+ FROM metabib.browse_entry_def_map
+ WHERE entry = rec.id
+ AND def = ANY(fields);
+
+ SELECT INTO result_row.fields STRING_AGG(DISTINCT x::TEXT, $$,$$) FROM UNNEST(afields || bfields) x;
+
+ result_row.sources := 0;
+ result_row.asources := 0;
+
+ -- Bib-linked vis checking
+ IF ARRAY_UPPER(all_brecords,1) IS NOT NULL THEN
+
+ full_end := ARRAY_LENGTH(all_brecords, 1);
+ superpage_size := COALESCE(browse_superpage_size, full_end);
+ slice_start := 1;
+ slice_end := superpage_size;
+
+ WHILE result_row.sources = 0 AND slice_start <= full_end LOOP
+ superpage_of_records := all_brecords[slice_start:slice_end];
+ qpfts_query :=
+ 'SELECT NULL::BIGINT AS id, ARRAY[r] AS records, ' ||
+ 'NULL AS badges, NULL AS popularity, ' ||
+ '1::INT AS rel FROM (SELECT UNNEST(' ||
+ quote_literal(superpage_of_records) || '::BIGINT[]) AS r) rr';
+
+ -- We use search.query_parser_fts() for visibility testing.
+ -- We're calling it once per browse-superpage worth of records
+ -- out of the set of records related to a given mbe, until we've
+ -- either exhausted that set of records or found at least 1
+ -- visible record.
+
+ SELECT INTO result_row.sources visible
+ FROM search.query_parser_fts(
+ context_org, NULL, qpfts_query, NULL,
+ context_locations, 0, NULL, NULL, FALSE, staff, FALSE
+ ) qpfts
+ WHERE qpfts.rel IS NULL;
+
+ slice_start := slice_start + superpage_size;
+ slice_end := slice_end + superpage_size;
+ END LOOP;
+
+ -- Accurate? Well, probably.
+ result_row.accurate := browse_superpage_size IS NULL OR
+ browse_superpage_size >= full_end;
+
+ END IF;
+
+ -- Authority-linked vis checking
+ IF ARRAY_UPPER(all_arecords,1) IS NOT NULL THEN
+
+ full_end := ARRAY_LENGTH(all_arecords, 1);
+ superpage_size := COALESCE(browse_superpage_size, full_end);
+ slice_start := 1;
+ slice_end := superpage_size;
+
+ WHILE result_row.asources = 0 AND slice_start <= full_end LOOP
+ superpage_of_records := all_arecords[slice_start:slice_end];
+ qpfts_query :=
+ 'SELECT NULL::BIGINT AS id, ARRAY[r] AS records, ' ||
+ 'NULL AS badges, NULL AS popularity, ' ||
+ '1::INT AS rel FROM (SELECT UNNEST(' ||
+ quote_literal(superpage_of_records) || '::BIGINT[]) AS r) rr';
+
+ -- We use search.query_parser_fts() for visibility testing.
+ -- We're calling it once per browse-superpage worth of records
+ -- out of the set of records related to a given mbe, via
+ -- authority until we've either exhausted that set of records
+ -- or found at least 1 visible record.
+
+ SELECT INTO result_row.asources visible
+ FROM search.query_parser_fts(
+ context_org, NULL, qpfts_query, NULL,
+ context_locations, 0, NULL, NULL, FALSE, staff, FALSE
+ ) qpfts
+ WHERE qpfts.rel IS NULL;
+
+ slice_start := slice_start + superpage_size;
+ slice_end := slice_end + superpage_size;
+ END LOOP;
+
+
+ -- Accurate? Well, probably.
+ result_row.aaccurate := browse_superpage_size IS NULL OR
+ browse_superpage_size >= full_end;
+
+ END IF;
+
+ IF result_row.sources > 0 OR result_row.asources > 0 THEN
+
+ -- The function that calls this function needs row_number in order
+ -- to correctly order results from two different runs of this
+ -- functions.
+ result_row.row_number := row_number;
+
+ -- Now, if row_counter is still less than limit, return a row. If
+ -- not, but it is less than next_pivot_pos, continue on without
+ -- returning actual result rows until we find
+ -- that next pivot, and return it.
+
+ IF row_counter < result_limit THEN
+ result_row.browse_entry := rec.id;
+ result_row.value := rec.value;
+
+ RETURN NEXT result_row;
+ ELSE
+ result_row.browse_entry := NULL;
+ result_row.authorities := NULL;
+ result_row.fields := NULL;
+ result_row.value := NULL;
+ result_row.sources := NULL;
+ result_row.sees := NULL;
+ result_row.accurate := NULL;
+ result_row.aaccurate := NULL;
+ result_row.pivot_point := rec.id;
+
+ IF row_counter >= next_pivot_pos THEN
+ RETURN NEXT result_row;
+ RETURN;
+ END IF;
+ END IF;
+
+ IF count_up_from_zero THEN
+ row_number := row_number + 1;
+ ELSE
+ row_number := row_number - 1;
+ END IF;
+
+ -- row_counter is different from row_number.
+ -- It simply counts up from zero so that we know when
+ -- we've reached our limit.
+ row_counter := row_counter + 1;
+ END IF;
+ END LOOP;
+END;
+$p$ LANGUAGE PLPGSQL;
+
COMMIT;
projects / evergreen / pines.git / commitdiff