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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: '$Id$'
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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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);
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