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metacat / src / xmltables.sql @ 123

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/*
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 * xmltables.sql -- Create or replace tables for storing XML in the db
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 *
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 *      Purpose: creates tables needed for XML database
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 * 
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 *      Created: 12 September 1999
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 *       Author: Matt Jones
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 * Organization: National Center for Ecological Analysis and Synthesis
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 *    Copyright: 2000 Regents of the University of California and the
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 *               National Center for Ecological Analysis and Synthesis
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 *  For Details: http://www.nceas.ucsb.edu/
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 *    File Info: '$Id: xmltables.sql 123 2000-06-07 00:44:37Z jones $'
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 *
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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_catalog_id_seq;
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DROP SEQUENCE xml_documents_id_seq;
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DROP TRIGGER xml_nodes_before_insert;
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DROP TRIGGER xml_documents_before_insert;
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DROP TRIGGER xml_catalog_before_insert;
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DROP TABLE xml_index;
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DROP TABLE xml_catalog;
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DROP TABLE xml_documents;
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DROP TABLE xml_nodes;
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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 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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        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                NUMBER(20),        -- index to the document id
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        date_created        DATE,
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        date_updated        DATE,
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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 SEQUENCE xml_nodes_id_seq;
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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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 * Documents -- table to store XML documents
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 */
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CREATE TABLE xml_documents (
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        docid                NUMBER(20),        -- the document id #
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        rootnodeid        NUMBER(20),        -- refernce to the 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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        doctitle        VARCHAR2(1000),        -- title of document if exists
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        date_created        DATE,
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        date_updated        DATE,
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   CONSTRAINT xml_documents_pk PRIMARY KEY (docid),
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   CONSTRAINT xml_documents_root_fk 
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                FOREIGN KEY (rootnodeid) REFERENCES xml_nodes
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);
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CREATE SEQUENCE xml_documents_id_seq;
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CREATE TRIGGER xml_documents_before_insert
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BEFORE INSERT ON xml_documents FOR EACH ROW
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BEGIN
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  SELECT xml_documents_id_seq.nextval
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    INTO :new.docid
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    FROM dual;
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END;
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/
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/* 
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 * XML Catalog -- table to store all external sources for XML documents
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 */
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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 (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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 * Index of Nodes -- table to store precomputed paths through tree for 
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 * quick searching in structured searches
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 */
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CREATE TABLE xml_index (
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        nodeid                NUMBER(20),        -- the unique node id
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        path                VARCHAR2(20),        -- precomputed path through tree
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   CONSTRAINT xml_index_pk PRIMARY KEY (nodeid,path),
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   CONSTRAINT xml_nodes_fk FOREIGN KEY (nodeid) REFERENCES xml_nodes
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);