schemas/vegbien.sql: taxonlabel_update_ancestors(): don't do an index scan if the value being scanned for is NULL, to support testing this function without the indexes in place, without extra full-table scans for NULL values affecting things. this can be used to determine if the function is actually using the indexes, by turning them off and seeing if the runtime changes.
schemas/vegbien.sql: taxonlabel_update_ancestors(): don't do an index scan if the value being scanned for is NULL, to support testing this function without the indexes in place, without extra full-table scans for NULL values affecting things. this can be used to determine if the function is actually using the indexes, by turning them off and seeing if the runtime changes.