Metacat

/*

 * xmltables.sql -- Create or replace tables for storing XML in the db

 *

 *      Purpose: creates tables needed for XML database

 * 

 *      Created: 12 September 1999

 *       Author: Matt Jones

 * Organization: National Center for Ecological Analysis and Synthesis

 *    Copyright: 2000 Regents of the University of California and the

 *               National Center for Ecological Analysis and Synthesis

 *  For Details: http://www.nceas.ucsb.edu/

 *    File Info: '$Id: xmltables.sql 177 2000-06-20 01:42:11Z jones $'

 *

 */

/*

 * Drop all of the objects in proper order

 */

set echo off

DROP SEQUENCE xml_nodes_id_seq;

DROP SEQUENCE xml_catalog_id_seq;

DROP TRIGGER xml_catalog_before_insert;

DROP TABLE xml_index;

DROP TABLE xml_catalog;

DROP TABLE xml_documents;

DROP TABLE xml_nodes;

DROP TABLE xml_acc_numbers;

/* 

 * Nodes -- table to store XML Nodes (both elements and attributes)

 */

CREATE TABLE xml_nodes (

        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

        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(55),        -- index to the document id

        date_created        DATE,

        date_updated        DATE,

   CONSTRAINT xml_nodes_pk PRIMARY KEY (nodeid),

   CONSTRAINT xml_nodes_root_fk 

                FOREIGN KEY (rootnodeid) REFERENCES xml_nodes,

   CONSTRAINT xml_nodes_parent_fk 

                FOREIGN KEY (parentnodeid) REFERENCES xml_nodes

);

CREATE SEQUENCE xml_nodes_id_seq;

/* 

 * Documents -- table to store XML documents

 */

CREATE TABLE xml_documents (

        docid                VARCHAR2(250),        -- the document id #

        rootnodeid        NUMBER(20),        -- reference to root node of the DOM

        docname                VARCHAR2(100),        -- usually the root element name

        doctype                VARCHAR2(100),        -- public id indicating document type

        doctitle        VARCHAR2(1000),        -- title of document if exists

        date_created        DATE,

        date_updated        DATE,

   CONSTRAINT xml_documents_pk PRIMARY KEY (docid),

   CONSTRAINT xml_documents_root_fk 

                FOREIGN KEY (rootnodeid) REFERENCES xml_nodes

);

/* 

 * XML Catalog -- table to store all external sources for XML documents

 */

CREATE TABLE xml_catalog (

        catalog_id        NUMBER(20),        -- the id for this catalog entry

        entry_type        VARCHAR2(500),        -- the type of this catalog entry

                                        -- (e.g., DTD, XSD, XSL)

        source_doctype        VARCHAR2(500),        -- the source public_id for transforms

        target_doctype        VARCHAR2(500),        -- the target public_id for transforms

        public_id        VARCHAR2(500),        -- the unique id for this type

        system_id        VARCHAR2(1000),        -- the local location of the object

   CONSTRAINT xml_catalog_pk PRIMARY KEY (catalog_id)

   -- CONSTRAINT xml_catalog_uk UNIQUE (entry_type, source_doctype, target_doctype, public_id)

);

CREATE SEQUENCE xml_catalog_id_seq;

CREATE TRIGGER xml_catalog_before_insert

BEFORE INSERT ON xml_catalog FOR EACH ROW

BEGIN

  SELECT xml_catalog_id_seq.nextval

    INTO :new.catalog_id

    FROM dual;

END;

/

/* 

 * Index of Nodes -- table to store precomputed paths through tree for 

 * quick searching in structured searches

 */

CREATE TABLE xml_index (

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

        path                VARCHAR2(200),        -- precomputed path through tree

   CONSTRAINT xml_index_pk PRIMARY KEY (nodeid,path),

   CONSTRAINT xml_nodes_fk FOREIGN KEY (nodeid) REFERENCES xml_nodes

);

/* 

 * Index of the paths in xml_index 

 */

CREATE INDEX xml_index_idx1 ON xml_index (path);

/* 

 * table to store unique Accession # for every document in 2 parts

 */

CREATE TABLE xml_acc_numbers (

        global_name        VARCHAR2(32),        -- first part of acc #

        local_id        NUMBER(20),        -- second part - unique in global name

   CONSTRAINT xml_acc_numbers_pk PRIMARY KEY (global_name, local_id)

);