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metacat / src / xmltables-oracle.sql @ 4810

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/**
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 *  '$RCSfile$'
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 *  Copyright: 2004 Regents of the University of California and the
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 *             National Center for Ecological Analysis and Synthesis
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 *
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 *   '$Author: daigle $'
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 *     '$Date: 2008-10-02 14:46:50 -0700 (Thu, 02 Oct 2008) $'
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 * '$Revision: 4415 $'
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 */
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/*
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 * Drop all of the objects in proper order
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 */
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set echo off
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DROP SEQUENCE xml_nodes_id_seq;
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DROP SEQUENCE xml_revisions_id_seq;
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DROP SEQUENCE xml_catalog_id_seq;
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DROP SEQUENCE xml_relation_id_seq;
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DROP SEQUENCE xml_replication_id_seq;
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DROP SEQUENCE identifier_id_seq;
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DROP SEQUENCE access_log_id_seq;
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DROP SEQUENCE xml_returnfield_id_seq;
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DROP SEQUENCE xml_queryresult_id_seq;
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DROP SEQUENCE xml_path_index_id_seq;
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DROP SEQUENCE db_version_id_seq;
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/* Drop triggers are not necessary */
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DROP TRIGGER xml_nodes_before_insert;
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DROP TRIGGER xml_revisions_before_insert;
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DROP TRIGGER xml_catalog_before_insert;
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DROP TRIGGER xml_relation_before_insert;
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DROP TRIGGER xml_replication_before_insert;
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DROP TRIGGER identifier_before_insert;
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DROP TRIGGER access_log_before_insert;
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DROP TRIGGER xml_returnfield_before_insert;
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DROP TRIGGER xml_queryresult_before_insert;
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DROP TRIGGER db_version_before_insert;
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54

    
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DROP TABLE xml_index;
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DROP TABLE xml_access;
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DROP TABLE xml_accesssubtree;
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DROP TABLE xml_revisions;
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DROP TABLE xml_relation;
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DROP TABLE xml_documents CASCADE CONSTRAINTS;
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DROP TABLE xml_nodes;
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DROP TABLE xml_nodes_revisions;
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DROP TABLE xml_replication;
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DROP TABLE xml_catalog;
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DROP TABLE identifier;
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DROP TABLE access_log;
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DROP TABLE harvest_site_schedule;
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DROP TABLE harvest_detail_log;
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DROP TABLE harvest_log;
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DROP TABLE xml_queryresult;
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DROP TABLE xml_returnfield;
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DROP TABLE xml_path_index;
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DROP TABLE db_version;
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/*
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 *Replication -- table to store servers that metacat is replicated to
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 */
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CREATE TABLE xml_replication (
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  serverid      NUMBER(20),
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  server        VARCHAR2(512),
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  last_checked  DATE,
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  replicate     NUMBER(1),
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  datareplicate NUMBER(1),
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  hub NUMBER(1),
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  CONSTRAINT xml_replication_pk PRIMARY KEY (serverid)
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);
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CREATE SEQUENCE xml_replication_id_seq;
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CREATE TRIGGER xml_replication_before_insert
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BEFORE INSERT ON xml_replication FOR EACH ROW
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BEGIN
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  SELECT xml_replication_id_seq.nextval
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    INTO :new.serverid
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    FROM dual;
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END;
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/
97

    
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INSERT INTO xml_replication (server, replicate, datareplicate, hub)
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 VALUES ('localhost', '0', '0', '0');
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/*
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 * Nodes -- table to store XML Nodes (both elements and attributes)
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 */
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CREATE SEQUENCE xml_nodes_id_seq;
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CREATE TABLE xml_nodes (
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        nodeid                NUMBER(20),        -- the unique node id (pk)
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        nodeindex        NUMBER(10),        -- order of nodes within parent
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        nodetype        VARCHAR2(20),        -- type (DOCUMENT, COMMENT, PI,
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                                        -- ELEMENT, ATTRIBUTE, TEXT)
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        nodename        VARCHAR2(250),        -- the name of an element or attribute
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        nodeprefix        VARCHAR2(50),        -- the namespace prefix of an element
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                                        -- or attribute
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        nodedata        VARCHAR2(4000), -- the data for this node (e.g.,
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                                        -- for TEXT it is the content)
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        parentnodeid        NUMBER(20),        -- index of the parent of this node
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        rootnodeid        NUMBER(20),        -- index of the root node of this tree
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        docid                VARCHAR2(250),        -- index to the document id
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        date_created        DATE,
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        date_updated        DATE,
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        nodedatanumerical NUMBER,       -- the data for this node if
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                                        -- it is a number
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   CONSTRAINT xml_nodes_pk PRIMARY KEY (nodeid),
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   CONSTRAINT xml_nodes_root_fk
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                FOREIGN KEY (rootnodeid) REFERENCES xml_nodes,
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   CONSTRAINT xml_nodes_parent_fk
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                FOREIGN KEY (parentnodeid) REFERENCES xml_nodes
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);
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CREATE TRIGGER xml_nodes_before_insert
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BEFORE INSERT ON xml_nodes FOR EACH ROW
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BEGIN
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  SELECT xml_nodes_id_seq.nextval
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    INTO :new.nodeid
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    FROM dual;
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END;
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/
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/*
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 * Indexes of rootnodeid, parentnodeid, and nodename in xml_nodes
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 */
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CREATE INDEX xml_nodes_idx1 ON xml_nodes (rootnodeid);
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CREATE INDEX xml_nodes_idx2 ON xml_nodes (parentnodeid);
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CREATE INDEX xml_nodes_idx3 ON xml_nodes (nodename);
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CREATE INDEX xml_nodes_idx4 ON xml_nodes (docid);
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146

    
147
/*
148
 * xml_nodes_revisions -- table to store nodes from xml_nodes which are of old revisions and deleted document
149
 */
150

    
151
CREATE TABLE xml_nodes_revisions (
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        nodeid          NUMBER(20),     -- the unique node id (pk)
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        nodeindex       NUMBER(10),     -- order of nodes within parent
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        nodetype        VARCHAR2(20),   -- type (DOCUMENT, COMMENT, PI,
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                                        -- ELEMENT, ATTRIBUTE, TEXT)
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        nodename        VARCHAR2(250),  -- the name of an element or attribute
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        nodeprefix      VARCHAR2(50),   -- the namespace prefix of an element
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                                        -- or attribute
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        nodedata        VARCHAR2(4000), -- the data for this node (e.g.,
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                                        -- for TEXT it is the content)
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        parentnodeid    NUMBER(20),     -- index of the parent of this node
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        rootnodeid      NUMBER(20),     -- index of the root node of this tree
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        docid           VARCHAR2(250),  -- index to the document id
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        date_created    DATE,
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        date_updated    DATE,
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        nodedatanumerical NUMBER,       -- the data for this node if
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                                        -- it is a number
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   CONSTRAINT xml_nodes_revisions_pk PRIMARY KEY (nodeid),
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   CONSTRAINT xml_nodes_revisions_root_fk
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                FOREIGN KEY (rootnodeid) REFERENCES xml_nodes_revisions,
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   CONSTRAINT xml_nodes_revisions_parent_fk
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                FOREIGN KEY (parentnodeid) REFERENCES xml_nodes_revisions
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);
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/*
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 * Indexes of rootnodeid, parentnodeid, and nodename in xml_nodes_revision
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 */
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CREATE INDEX xml_nodes_revisions_idx1 ON xml_nodes_revisions (rootnodeid);
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CREATE INDEX xml_nodes_revisions_idx2 ON xml_nodes_revisions (parentnodeid);
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CREATE INDEX xml_nodes_revisions_idx3 ON xml_nodes_revisions (nodename);
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/*
184
 * XML Catalog -- table to store all external sources for XML documents
185
 */
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CREATE TABLE xml_catalog (
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        catalog_id        NUMBER(20),        -- the id for this catalog entry
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        entry_type        VARCHAR2(500),        -- the type of this catalog entry
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                                        -- (e.g., DTD, XSD, XSL)
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        source_doctype        VARCHAR2(500),        -- the source public_id for transforms
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        target_doctype        VARCHAR2(500),        -- the target public_id for transforms
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        public_id        VARCHAR2(500),        -- the unique id for this type
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        system_id        VARCHAR2(1000),        -- the local location of the object
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   CONSTRAINT xml_catalog_pk PRIMARY KEY (catalog_id),
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   CONSTRAINT xml_catalog_uk UNIQUE
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                (entry_type, source_doctype, target_doctype, public_id)
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);
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CREATE SEQUENCE xml_catalog_id_seq;
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CREATE TRIGGER xml_catalog_before_insert
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BEFORE INSERT ON xml_catalog FOR EACH ROW
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BEGIN
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  SELECT xml_catalog_id_seq.nextval
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    INTO :new.catalog_id
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    FROM dual;
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END;
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/
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/*
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 * Documents -- table to store XML documents
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 */
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CREATE TABLE xml_documents (
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        docid                VARCHAR2(250),        -- the document id #
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        rootnodeid        NUMBER(20),        -- reference to root node of the DOM
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        docname                VARCHAR2(100),        -- usually the root element name
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        doctype                VARCHAR2(100),        -- public id indicating document type
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        user_owner        VARCHAR2(100),        -- the user owned the document
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        user_updated        VARCHAR2(100),        -- the user updated the document
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        server_location NUMBER(20),        -- the server on which this document
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                                        -- originates
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        rev                 NUMBER(10) DEFAULT 1,--the revision number of the docume
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        date_created        DATE,
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        date_updated        DATE,
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        public_access        NUMBER(1),        -- flag for public access
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        catalog_id      NUMBER(20),        -- reference to xml_catalog
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   CONSTRAINT xml_documents_pk PRIMARY KEY (docid),
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   CONSTRAINT xml_documents_rep_fk
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                    FOREIGN KEY (server_location) REFERENCES xml_replication,
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   CONSTRAINT xml_documents_root_fk
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                FOREIGN KEY (rootnodeid) REFERENCES xml_nodes,
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   CONSTRAINT xml_documents_catalog_fk
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                FOREIGN KEY (catalog_id) REFERENCES xml_catalog
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);
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/*
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 * Index of <docid,doctype> in xml_document
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 */
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CREATE INDEX xml_documents_idx1 ON xml_documents (docid, doctype);
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CREATE INDEX xml_documents_idx2 ON xml_documents (lower(user_owner));
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CREATE INDEX xml_documents_idx3 ON xml_documents (rootnodeid);
242

    
243
/*
244
 * Revised Documents -- table to store XML documents saved after an UPDATE
245
 *                    or DELETE
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 */
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CREATE TABLE xml_revisions (
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        revisionid        NUMBER(20),        -- the revision number we are saving
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        docid                VARCHAR2(250),        -- the document id #
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        rootnodeid        NUMBER(20),        -- reference to root node of the DOM
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        docname                VARCHAR2(100),        -- usually the root element name
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        doctype                VARCHAR2(100),        -- public id indicating document type
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        user_owner        VARCHAR2(100),
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        user_updated        VARCHAR2(100),
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        server_location NUMBER(20),
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        rev                NUMBER(10),
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        date_created        DATE,
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        date_updated        DATE,
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        public_access        NUMBER(1),        -- flag for public access
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        catalog_id      NUMBER(20),        -- reference to xml_catalog
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   CONSTRAINT xml_revisions_pk PRIMARY KEY (revisionid),
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   CONSTRAINT xml_revisions_rep_fk
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                FOREIGN KEY (server_location) REFERENCES xml_replication,
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   CONSTRAINT xml_revisions_root_fk
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                FOREIGN KEY (rootnodeid) REFERENCES xml_nodes_revisions,
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   CONSTRAINT xml_revisions_catalog_fk
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                FOREIGN KEY (catalog_id) REFERENCES xml_catalog
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);
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270
CREATE SEQUENCE xml_revisions_id_seq;
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272
CREATE TRIGGER xml_revisions_before_insert
273
BEFORE INSERT ON xml_revisions FOR EACH ROW
274
BEGIN
275
  SELECT xml_revisions_id_seq.nextval
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    INTO :new.revisionid
277
    FROM dual;
278
END;
279
/
280

    
281
/*
282
 * ACL -- table to store ACL for XML documents by principals
283
 */
284
CREATE TABLE xml_access (
285
        docid                VARCHAR2(250),        -- the document id #
286
        accessfileid        VARCHAR2(250),        -- the document id # for the access file
287
        principal_name        VARCHAR2(100),        -- name of user, group, etc.
288
        permission        NUMBER(1),        -- "read", "write", "all"
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        perm_type        VARCHAR2(32),        -- "allowed" or "denied"
290
        perm_order        VARCHAR2(32),        -- "allow first" or "deny first"
291
        begin_time        DATE,                -- the time that permission begins
292
        end_time        DATE,                -- the time that permission ends
293
        ticket_count        NUMBER(5),        -- ticket counter for that permission
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  subtreeid VARCHAR2(32), -- sub tree id
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  startnodeid NUMBER(20), -- start node for sub tree
296
  endnodeid NUMBER(20),    -- end node for sub tree
297
   CONSTRAINT xml_access_ck CHECK (begin_time < end_time),
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   CONSTRAINT xml_access_accessfileid_fk
299
                FOREIGN KEY (accessfileid) REFERENCES xml_documents
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);
301
CREATE INDEX xml_access_idx1 ON xml_access (lower(principal_name));
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CREATE INDEX xml_access_idx2 ON xml_access (permission);
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CREATE INDEX xml_access_idx3 ON xml_access (perm_type);
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CREATE INDEX xml_access_idx4 ON xml_access (perm_order);
305
CREATE INDEX xml_access_idx5 ON xml_access (subtreeid);
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307

    
308
/*
309
 * Index of Nodes -- table to store precomputed paths through tree for
310
 * quick searching in structured searches
311
 */
312
CREATE TABLE xml_index (
313
        nodeid                NUMBER(20),        -- the unique node id
314
        path                VARCHAR2(1000),        -- precomputed path through tree
315
        docid                VARCHAR2(250),        -- index to the document id
316
        doctype                VARCHAR2(100),        -- public id indicating document type
317
        parentnodeid    NUMBER(20),     -- id of the parent of the node
318
                                        -- represented by this row
319
   CONSTRAINT xml_index_pk PRIMARY KEY (nodeid,path),
320
   CONSTRAINT xml_index_nodeid_fk FOREIGN KEY (nodeid) REFERENCES xml_nodes,
321
   CONSTRAINT xml_index_docid_fk
322
                FOREIGN KEY (docid) REFERENCES xml_documents
323
);
324

    
325
/*
326
 * Index of the paths in xml_index
327
 */
328
CREATE INDEX xml_index_idx1 ON xml_index (path);
329
CREATE INDEX xml_index_idx2 ON xml_index (docid);
330
CREATE INDEX xml_index_idx3 ON xml_index (nodeid);
331

    
332

    
333
/*
334
 * Index of Paths - table to store nodes with paths specified by userst in metacat.properties
335
 */
336
CREATE TABLE xml_path_index (
337
        nodeid          NUMBER(20),     -- the unique node id
338
        docid           VARCHAR2(250),  -- index to the document id
339
        path            VARCHAR2(1000), -- precomputed path through tree
340
            nodedata        VARCHAR2(4000), -- the data for this node e.g.,
341
        nodedatanumerical NUMBER(20),   -- the data for this node if
342
        parentnodeid    NUMBER(20),     -- index of the parent of this node
343
        CONSTRAINT xml_path_index_pk PRIMARY KEY (nodeid),
344
        CONSTRAINT xml_path_index_docid_fk FOREIGN KEY (docid) REFERENCES xml_documents
345
 );                                                                                        
346

    
347

    
348
/*
349
 * create sequence an trigger
350
 */
351
CREATE SEQUENCE xml_path_index_id_seq;                                                                                                                                                             
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CREATE TRIGGER xml_path_index_before_insert
353
BEFORE INSERT ON xml_path_index FOR EACH ROW
354
BEGIN
355
  SELECT xml_path_index_id_seq.nextval
356
    INTO :new.nodeid
357
    FROM dual;
358
END;
359
/
360

    
361

    
362
/*
363
 * Index of the path, nodedata, nodedatanumerical in xml_path_index
364
 */
365
CREATE INDEX xml_path_index_idx1 ON xml_path_index (path);
366
CREATE INDEX xml_path_index_idx2 ON xml_path_index (nodedata);
367
CREATE INDEX xml_path_index_idx3 ON xml_path_index (nodedatanumerical);
368

    
369

    
370

    
371
CREATE TABLE xml_relation (
372
        relationid    NUMBER(20) PRIMARY KEY, -- unique id
373
        docid         VARCHAR2(250),          -- the docid of the package file
374
                                              -- that this relation came from
375
        packagetype   VARCHAR2(250),          -- the type of the package
376
        subject       VARCHAR2(512) NOT NULL, -- the subject of the relation
377
        subdoctype    VARCHAR2(128),          -- the doctype of the subject
378
        relationship  VARCHAR2(128)  NOT NULL,-- the relationship type
379
        object        VARCHAR2(512) NOT NULL, -- the object of the relation
380
        objdoctype    VARCHAR2(128),          -- the doctype of the object
381
        CONSTRAINT xml_relation_uk UNIQUE (docid, subject, relationship, object),
382
        CONSTRAINT xml_relation_docid_fk
383
                FOREIGN KEY (docid) REFERENCES xml_documents
384
  );
385

    
386
CREATE SEQUENCE xml_relation_id_seq;
387

    
388
CREATE TRIGGER xml_relation_before_insert
389
BEFORE INSERT ON xml_relation FOR EACH ROW
390
BEGIN
391
  SELECT xml_relation_id_seq.nextval
392
    INTO :new.relationid
393
    FROM dual;
394
END;
395
/
396

    
397
/*
398
 * Table used to store all document identifiers in metacat.  Each identifier
399
 * consists of 4 subparts, an authority, namespace, object, and revision as
400
 * defined in the LSID specification.
401
 */
402
CREATE SEQUENCE identifier_id_seq;
403
CREATE TABLE identifier (
404
   id        NUMBER(20) PRIMARY KEY, -- primary key
405
   authority VARCHAR2(255),  -- the authority issuing the identifier
406
   namespace VARCHAR2(255),  -- the namespace qualifying the identifier
407
   object    VARCHAR2(255),  -- the local part of the identifier for a particular object
408
   revision  VARCHAR2(255)   -- the revision part of the identifier
409
);
410
CREATE TRIGGER identifier_before_insert
411
BEFORE INSERT ON identifier FOR EACH ROW
412
BEGIN
413
  SELECT identifier_id_seq.nextval
414
    INTO :new.id
415
    FROM dual;
416
END;
417
/
418

    
419
/*
420
 * accesssubtree -- table to store access subtree info
421
 */
422
CREATE TABLE xml_accesssubtree (
423
        docid                VARCHAR2(250),        -- the document id #
424
  rev                 NUMBER(10) DEFAULT 1, --the revision number of the docume
425
  controllevel VARCHAR2(50), -- the level it control -- document or subtree
426
  subtreeid VARCHAR2(250), -- the subtree id
427
        startnodeid        NUMBER(20),        -- the start node id of access subtree
428
  endnodeid NUMBER(20), -- the end node if of access subtree
429
  CONSTRAINT xml_accesssubtree_docid_fk
430
                FOREIGN KEY (docid) REFERENCES xml_documents
431
);
432

    
433
/*
434
 * Returnfields -- table to store combinations of returnfields requested
435
 *                   and the number of times this table is accessed
436
 */
437
CREATE TABLE xml_returnfield (
438
        returnfield_id     NUMBER(20),     -- the id for this returnfield entry
439
        returnfield_string VARCHAR2(2000), -- the returnfield string
440
        usage_count        NUMBER(20),     -- the number of times this string
441
                                           -- has been requested
442
        CONSTRAINT xml_returnfield_pk PRIMARY KEY (returnfield_id)
443
);
444
CREATE INDEX xml_returnfield_idx1 ON xml_returnfield(returnfield_string);
445

    
446
CREATE SEQUENCE xml_returnfield_id_seq;
447

    
448
CREATE TRIGGER xml_returnfield_before_insert
449
BEFORE INSERT ON xml_returnfield FOR EACH ROW
450
BEGIN
451
  SELECT xml_returnfield_id_seq.nextval
452
    INTO :new.returnfield_id
453
    FROM dual;
454
END;
455
/
456

    
457
/*
458
 * Queryresults -- table to store queryresults for a given docid
459
 * and returnfield_id
460
 */
461
CREATE TABLE xml_queryresult(
462
  queryresult_id       NUMBER(20),     -- id for this entry
463
  returnfield_id       NUMBER(20),     -- id for the returnfield corresponding to this entry
464
  docid                VARCHAR2(250),  -- docid of the document
465
  queryresult_string   VARCHAR2(4000), -- resultant text generated for this docid and given
466
                                         -- returnfield
467
  CONSTRAINT xml_queryresult_pk PRIMARY KEY (queryresult_id),
468
  CONSTRAINT xml_queryresult_searchid_fk
469
               FOREIGN KEY (returnfield_id) REFERENCES xml_returnfield
470
);
471

    
472
CREATE INDEX xml_queryresult_idx1 ON xml_queryresult (returnfield_id, docid);
473

    
474
CREATE SEQUENCE xml_queryresult_id_seq;
475

    
476
CREATE TRIGGER xml_queryresult_before_insert
477
BEFORE INSERT ON xml_queryresult FOR EACH ROW
478
BEGIN
479
 SELECT xml_queryresult_id_seq.nextval
480
   INTO :new.queryresult_id
481
   FROM dual;
482
END;
483
/
484

    
485

    
486

    
487

    
488
/*
489
 * Logging -- table to store metadata and data access log
490
 */
491
CREATE TABLE access_log (
492
  entryid       NUMBER(20),     -- the identifier for the log event
493
  ip_address    VARCHAR2(512),  -- the ip address inititiating the event
494
  principal     VARCHAR2(512),  -- the user initiiating the event
495
  docid         VARCHAR2(250),        -- the document id #
496
  event         VARCHAR2(512),  -- the code symbolizing the event type
497
  date_logged   DATE,           -- the datetime on which the event occurred
498
  CONSTRAINT access_log_pk PRIMARY KEY (entryid)
499
);
500

    
501
CREATE SEQUENCE access_log_id_seq;
502
CREATE TRIGGER access_log_before_insert
503
BEFORE INSERT ON access_log FOR EACH ROW
504
BEGIN
505
  SELECT access_log_id_seq.nextval
506
    INTO :new.entryid
507
    FROM dual;
508
END;
509
/
510

    
511
/*
512
 * harvest_site_schedule -- table to store harvest sites and schedule info
513
 */
514
CREATE TABLE harvest_site_schedule (
515
  site_schedule_id NUMBER,         -- unique id
516
  documentlisturl  VARCHAR2(255),  -- URL of the site harvest document list
517
  ldapdn           VARCHAR2(255),  -- LDAP distinguished name for site account
518
  datenextharvest  DATE,           -- scheduled date of next harvest
519
  datelastharvest  DATE,           -- recorded date of last harvest
520
  updatefrequency  NUMBER,         -- the harvest update frequency
521
  unit             VARCHAR2(50),   -- update unit -- days weeks or months
522
  contact_email    VARCHAR2(50),   -- email address of the site contact person
523
  ldappwd          VARCHAR2(20),   -- LDAP password for site account
524
  CONSTRAINT harvest_site_schedule_pk PRIMARY KEY (site_schedule_id)
525
);
526

    
527
/*
528
 * harvest_log -- table to log entries for harvest operations
529
 */
530
CREATE TABLE harvest_log (
531
  harvest_log_id         NUMBER,         -- unique id
532
  harvest_date           DATE,           -- date of the current harvest
533
  status                 NUMBER,         -- non-zero indicates an error status
534
  message                VARCHAR2(1000), -- text message for this log entry
535
  harvest_operation_code VARCHAR2(30),   -- the type of harvest operation
536
  site_schedule_id       NUMBER,         -- site schedule id, or 0 if no site
537
  CONSTRAINT harvest_log_pk PRIMARY KEY (harvest_log_id)
538
);
539

    
540
/*
541
 * harvest_detail_log -- table to log detailed info about documents that
542
 *                       generated errors during the harvest
543
 */
544
CREATE TABLE harvest_detail_log (
545
  detail_log_id          NUMBER,         -- unique id
546
  harvest_log_id         NUMBER,         -- ponter to the related log entry
547
  scope                  VARCHAR2(50),   -- document scope
548
  identifier             NUMBER,         -- document identifier
549
  revision               NUMBER,         -- document revision
550
  document_url           VARCHAR2(255),  -- document URL
551
  error_message          VARCHAR2(1000), -- text error message
552
  document_type          VARCHAR2(100),  -- document type
553
  CONSTRAINT harvest_detail_log_pk PRIMARY KEY (detail_log_id),
554
  CONSTRAINT harvest_detail_log_fk
555
        FOREIGN KEY (harvest_log_id) REFERENCES harvest_log
556
);
557

    
558
/*
559
 * db_version -- table to store the version history of this database
560
 */
561
CREATE TABLE db_version (
562
  db_version_id   NUMBER(20),       -- the identifier for the version
563
  version         VARCHAR(250),     -- the version number
564
  status          NUMBER(20),       -- status of the version
565
  date_created    DATE,             -- the datetime on which the version was created
566
  CONSTRAINT db_version_pk PRIMARY KEY (db_version_id)
567
);
568

    
569
CREATE SEQUENCE db_version_id_seq;
570
CREATE TRIGGER db_version_before_insert
571
BEFORE INSERT ON db_version FOR EACH ROW
572
BEGIN
573
  SELECT db_version_id_seq.nextval
574
    INTO :new.db_version_id
575
    FROM dual;
576
END;
577
/
578