Removed 'file_catalog' folder. Moved to vospace-file-catalog git repository.

/**_____________________________________________________________________________

 *

 *                                 OATS - INAF

 *  Osservatorio Astronomico di Tireste - Istituto Nazionale di Astrofisica

 *  Astronomical Observatory of Trieste - National Institute for Astrophysics

 * ____________________________________________________________________________

 *

 * Copyright (C) 2020  Istituto Nazionale di Astrofisica

 * 

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software Foundation, Inc., 

 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

 * _____________________________________________________________________________

 **/

/*

    VOSpace front-end

*/

CREATE EXTENSION IF NOT EXISTS ltree;

CREATE TYPE NodeType AS ENUM ('container', 'data', 'link');

CREATE TYPE LocationType AS ENUM ('virtual', 'tape', 'user', 'LBT');

CREATE TABLE Node (

    node_id                BIGSERIAL     NOT NULL,

    parent_path            LTREE         default NULL,

    parent_relative_path   LTREE         default NULL,

    name                   VARCHAR       NOT NULL,

    os_name                VARCHAR       default NULL,

    type                   NodeType      NOT NULL,

    location_type          LocationType  default NULL,

    format                 VARCHAR       default NULL,

    -- format serve per distinguere unstuctured (format=NULL) da structured che hanno un formato noto

    async_trans            BOOLEAN       default NULL,

    -- async_trans serve per indicare se il nodo e` ospitato da un cold storage e deve essere necessariamente 

    -- trasferito con un trasferimento asincrono 

    busy_state             BOOLEAN       default NULL,

    owner_id               VARCHAR       default NULL,

    creator_id             VARCHAR       default NULL,

    group_read             VARCHAR[]     default NULL,

    group_write            VARCHAR[]     default NULL,

    is_public              BOOLEAN       default NULL,

    delta                  BIGINT        default NULL,

    /* potrebbe essere un delta di dati trasferito durante un trasferimento asincrono.

       Dovrebbe stare sul servizio che fa il trasferimento  (es. redis) */

    content_type           VARCHAR       default NULL,

    content_encoding       VARCHAR       default NULL,

    content_length         BIGINT        default NULL,

    content_md5            TEXT          default NULL,

    created_on             TIMESTAMP     default CURRENT_TIMESTAMP,

    last_modified          TIMESTAMP     default NULL,

    -- link                  TEXT          default NULL,

    accept_views           TEXT[]        default NULL,

    provide_views          TEXT[]        default NULL,

    -- serve per mappare il nome del servizio di storage da interrogare per accedere al contenuto di questo nodo 

    -- storage_id            VARCHAR,    

    protocols              TEXT[]        default NULL,

    PRIMARY KEY (node_id)

);

CREATE TABLE NodeProperty (

    node_id           BIGSERIAL,

    property_uri      VARCHAR       NOT NULL,

    property_value    VARCHAR       default NULL,

    last_modified     TIMESTAMP     default CURRENT_TIMESTAMP,

    -- support replication with a fake primary key

    -- _rep_support     BIGINT       NOT NULL PRIMARY KEY,

    foreign key (node_id) references Node (node_id)

);

CREATE TABLE DeletedNode (

    node_id           BIGSERIAL     NOT NULL,

    name              VARCHAR       NOT NULL,

    owner_id          VARCHAR       NOT NULL,

    last_modified     TIMESTAMP     default CURRENT_TIMESTAMP,

    PRIMARY KEY (node_id)

);

CREATE TABLE Users (

    rap_id            VARCHAR       NOT NULL,

    user_name         VARCHAR       NOT NULL,

    e_mail            VARCHAR       NOT NULL,

    PRIMARY KEY (rap_id)

);

/*

    Author: Sonia Zorba

    Email: sonia.zorba@inaf.it

*/

-- Generates the path from parent_path and id

CREATE OR REPLACE FUNCTION path(parent_path ltree, id bigint) RETURNS ltree AS

$func$

BEGIN

    RETURN text2ltree(CASE

        WHEN parent_path IS NULL THEN ''

        WHEN parent_path::varchar = '' THEN id::varchar

        ELSE (parent_path::varchar || '.' || id::varchar)

    END);

END

$func$ LANGUAGE plpgsql IMMUTABLE; 

-- Testing the function

SELECT CASE WHEN

path(NULL, 0) = text2ltree('')

AND path(text2ltree(''), 1) = text2ltree('1')

AND path(text2ltree('1'), 2) = text2ltree('1.2')

THEN 'PASSED' ELSE 'FAILED' END AS test;

 No newline at end of file

/*

    Author: Sonia Zorba

    Email: sonia.zorba@inaf.it

*/

CREATE INDEX file_name_idx ON Node USING btree(name);

CREATE INDEX file_parent_path_gist_idx ON Node USING GIST(parent_path);

CREATE INDEX file_parent_path_idx ON Node USING btree(parent_path);

ALTER TABLE Node ADD COLUMN path ltree GENERATED ALWAYS AS (path(parent_path, node_id)) STORED;

CREATE INDEX file_path_gist_idx ON Node USING GIST(path);

CREATE UNIQUE INDEX file_path_idx ON Node USING btree(path);

ALTER TABLE Node ADD COLUMN relative_path ltree GENERATED ALWAYS AS (path(parent_relative_path, node_id)) STORED;

CREATE INDEX file_rel_path_gist_idx ON Node USING GIST(relative_path);

/*

    Author: Sonia Zorba

    Email: sonia.zorba@inaf.it

*/

-- This view allows to obtain the the ltree_path from the os_path

-- Example query:

-- SELECT path FROM Node n JOIN node_os_path o ON n.node_id = o.node_id WHERE os_path = '/curban/store';

CREATE VIEW node_os_path AS

SELECT node_id, '/' AS os_path FROM Node WHERE path = ''

UNION

SELECT node_id, '/' || string_agg(name, '/') AS os_path

FROM (

    SELECT (CASE WHEN os_name IS NOT NULL THEN os_name ELSE name END) AS name, p.node_id

    FROM Node n

    JOIN (

        SELECT UNNEST(string_to_array(relative_path::varchar, '.')) AS rel_id, node_id

        FROM Node

    ) AS p ON n.node_id::varchar = p.rel_id

    ORDER BY p.node_id, nlevel(n.path)

) AS j GROUP BY node_id;

-- View that maps node_id to vos_path

CREATE VIEW node_vos_path AS

SELECT node_id, '/' AS vos_path FROM Node WHERE path = ''

UNION

SELECT node_id, '/' || string_agg(name, '/') AS os_path

FROM (

    SELECT name, p.node_id

    FROM Node n

    JOIN (

        SELECT UNNEST(string_to_array(path::varchar, '.')) AS rel_id, node_id

        FROM Node

    ) AS p ON n.node_id::varchar = p.rel_id

    ORDER BY p.node_id, nlevel(n.path)

) AS j GROUP BY node_id;

-- This view allows to obtain the the os_path from the vos_path

CREATE VIEW node_path AS

SELECT v.node_id, vos_path, os_path

FROM node_vos_path v

LEFT JOIN node_os_path o ON o.node_id = v.node_id;

/*

    Author: Sonia Zorba

    Email: sonia.zorba@inaf.it

*/

-- Generate the os_path from the Node id

-- It could be used for initializing the os_path generated column

CREATE OR REPLACE FUNCTION get_os_path(input_id int) RETURNS varchar AS

$func$

SELECT string_agg(name, '/') FROM (

    WITH RECURSIVE paths AS (

            SELECT node_id, name, path, parent_path, 1 AS level

            FROM Node

            WHERE node_id = input_id

        UNION ALL

            SELECT f.node_id, f.name, f.path, f.parent_path, p.level + 1

            FROM Node f

            INNER JOIN paths p ON p.parent_path = f.path

    ) SELECT name FROM paths ORDER BY LEVEL DESC

) AS names;

$func$ LANGUAGE sql;