Metacat

/**

 *  '$RCSfile$'

 *  Copyright: 2004 Regents of the University of California and the

 *             National Center for Ecological Analysis and Synthesis

 *

 *   '$Author: sgarg $'

 *     '$Date: 2005-09-07 16:51:20 -0700 (Wed, 07 Sep 2005) $'

 * '$Revision: 2567 $'

 *

 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

/**

 * Create the xml_path_index table

 */

CREATE SEQUENCE xml_path_index_id_seq;

CREATE TABLE xml_path_index (

        nodeid          NUMBER(20),     -- the unique node id

        docid           VARCHAR2(250),  -- index to the document id

        path            VARCHAR2(1000), -- precomputed path through tree

	nodedata        VARCHAR2(4000), -- the data for this node (e.g.,

                                        -- for TEXT it is the content)

        nodedatanumerical NUMBER,       -- the data for this node if

                                        -- it is a number

        parentnodeid    NUMBER(20),     -- index of the parent of this node

   CONSTRAINT xml_path_index_pk PRIMARY KEY (nodeid),

   CONSTRAINT xml_path_index_docid_fk

                FOREIGN KEY (docid) REFERENCES xml_documents

);

CREATE TRIGGER xml_path_index_before_insert

BEFORE INSERT ON xml_path_index FOR EACH ROW

BEGIN

  SELECT xml_path_index_id_seq.nextval

    INTO :new.nodeid

    FROM dual;

END;

/

/*

 * Index of the path, nodedata, nodedatanumerical in xml_path_index

 */

CREATE INDEX xml_path_index_idx1 ON xml_path_index (path);

CREATE INDEX xml_path_index_idx2 ON xml_path_index (nodedata);

CREATE INDEX xml_path_index_idx3 ON xml_path_index (nodedatanumerical);

/**

 * Create the xml_nodes_revisions table

 * to store nodes from xml_nodes which 

 * are of old revisions and deleted document

 */

CREATE TABLE xml_nodes_revisions (

        nodeid          NUMBER(20),     -- the unique node id (pk)

        nodeindex       NUMBER(10),     -- order of nodes within parent

        nodetype        VARCHAR2(20),   -- type (DOCUMENT, COMMENT, PI,

                                        -- ELEMENT, ATTRIBUTE, TEXT)

        nodename        VARCHAR2(250),  -- the name of an element or attribute

        nodeprefix      VARCHAR2(50),   -- the namespace prefix of an element

                                        -- or attribute

        nodedata        VARCHAR2(4000), -- the data for this node (e.g.,

                                        -- for TEXT it is the content)

        parentnodeid    NUMBER(20),     -- index of the parent of this node

        rootnodeid      NUMBER(20),     -- index of the root node of this tree

        docid           VARCHAR2(250),  -- index to the document id

        date_created    DATE,

        date_updated    DATE,

        nodedatanumerical NUMBER,       -- the data for this node if

                                        -- it is a number

   CONSTRAINT xml_nodes_revisions_pk PRIMARY KEY (nodeid),

   CONSTRAINT xml_nodes_revisions_root_fk

                FOREIGN KEY (rootnodeid) REFERENCES xml_nodes_revisions,

   CONSTRAINT xml_nodes_revisions_parent_fk

                FOREIGN KEY (parentnodeid) REFERENCES xml_nodes_revisions

);

/**

 * Indexes of rootnodeid, parentnodeid, and nodename in xml_nodes_revision

 */

CREATE INDEX xml_nodes_revisions_idx1 ON xml_nodes_revisions (rootnodeid);

CREATE INDEX xml_nodes_revisions_idx2 ON xml_nodes_revisions (parentnodeid);

CREATE INDEX xml_nodes_revisions_idx3 ON xml_nodes_revisions (nodename);

/**

 * Drop the constraint from xml_revisions which points to xml_nodes

 */

ALTER TABLE xml_revisions DROP CONSTRAINT xml_revisions_root_fk;

/**

 * Copy the nodes from xml_nodes to xml_nodes_revisions for old revisions

 * of the documents and deleted documents

 */

INSERT INTO xml_nodes_revisions (nodeid, nodeindex, nodetype,

nodename, nodeprefix, nodedata, parentnodeid, rootnodeid,

docid, date_created, date_updated, nodedatanumerical)

SELECT * FROM xml_nodes WHERE rootnodeid NOT IN

(SELECT rootnodeid from xml_documents where rootnodeid is not NULL);

/**

 * Create the key constraint in xml_revisions which points to 

 * xml_nodes_revisions

 */

ALTER TABLE xml_revisions ADD CONSTRAINT xml_revisions_root_fk

 FOREIGN KEY (rootnodeid) REFERENCES xml_nodes_revisions (nodeid);

/**

 * Delete the records from xml_index table which point to old revisions in xml_index

 * This is possible for documents for which the indexing thread failed during UPDATE

 */

DELETE FROM xml_index WHERE nodeid IN (SELECT nodeid FROM xml_nodes WHERE

rootnodeid NOT IN (SELECT rootnodeid FROM xml_documents WHERE rootnodeid IS NOT NULL)); 

/**

 * Delete the records from xml_nodes which were transfered to xml_nodes_revisions 

 */

DELETE FROM xml_nodes WHERE rootnodeid NOT IN

(SELECT rootnodeid from xml_documents where rootnodeid is not NULL);