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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 445 2000-09-12 20:38:42Z bojilova $'
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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_revisions_id_seq;
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DROP SEQUENCE xml_catalog_id_seq;
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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 TABLE xml_index;
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DROP TABLE xml_catalog;
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DROP TABLE xml_access;
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DROP TABLE xml_revisions;
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DROP TABLE xml_documents;
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DROP TABLE xml_nodes;
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DROP TABLE xml_acc_numbers;
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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		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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   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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/* 
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 * Indexes of rootnodeid & parentnodeid 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 SEQUENCE xml_nodes_id_seq;
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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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	doctitle	VARCHAR2(1000),	-- title of document if exists
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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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	date_created	DATE,
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	date_updated	DATE,
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	public_access	NUMBER(1) DEFAULT 1, -- flag for public access
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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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/* 
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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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/* 
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 * ACL -- table to store ACL for XML documents by principals
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 */
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CREATE TABLE xml_access (
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	docid		VARCHAR2(250),	-- the document id #
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	principal_name	VARCHAR2(100),	-- name of user, user group, etc.
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	principal_type	VARCHAR2(20),	-- like "user", "group", etc.
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	access_type	NUMBER(1),	-- "read", "write", "all"
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	begin_time	DATE,		-- the time that access permission begins
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	end_time	DATE,		-- the time that access permission ends
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   CONSTRAINT xml_access_pk UNIQUE (docid, principal_name, principal_type, access_type, begin_time),
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   CONSTRAINT xml_access_ck CHECK (begin_time < end_time)
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);
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/* 
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 * Revised Documents -- table to store XML documents saved after an UPDATE
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 *                    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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	doctitle	VARCHAR2(1000),	-- title of document if exists
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	user_owner	VARCHAR2(100),
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	user_updated	VARCHAR2(100),
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	date_created	DATE,
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	date_updated	DATE,
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   CONSTRAINT xml_revisions_pk PRIMARY KEY (revisionid),
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   CONSTRAINT xml_revisions_root_fk 
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		FOREIGN KEY (rootnodeid) REFERENCES xml_nodes
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);
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CREATE SEQUENCE xml_revisions_id_seq;
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CREATE TRIGGER xml_revisions_before_insert
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BEFORE INSERT ON xml_revisions FOR EACH ROW
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BEGIN
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  SELECT xml_revisions_id_seq.nextval
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    INTO :new.revisionid
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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(200),	-- precomputed path through tree
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	docid		VARCHAR2(250),	-- index to the document id
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	doctype		VARCHAR2(100),	-- public id indicating document type
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   CONSTRAINT xml_index_pk PRIMARY KEY (nodeid,path),
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   CONSTRAINT xml_index_nodeid_fk FOREIGN KEY (nodeid) REFERENCES xml_nodes,
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   CONSTRAINT xml_index_docid_fk 
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		FOREIGN KEY (docid) REFERENCES xml_documents
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);
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/* 
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 * Index of the paths in xml_index 
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 */
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CREATE INDEX xml_index_idx1 ON xml_index (path);
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/* 
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 * table to store unique Accession # for every document in 2 parts
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 */
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CREATE TABLE xml_acc_numbers (
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	global_name	VARCHAR2(32),	-- first part of acc #
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	local_id	NUMBER(20),	-- second part - unique in global name
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   CONSTRAINT xml_acc_numbers_pk PRIMARY KEY (global_name, local_id)
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);
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