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<P ALIGN=CENTER STYLE="margin-bottom: 0in"><FONT FACE="Times, serif"><FONT SIZE=4 STYLE="font-size: 16pt"><B>Creating
a Jakarta Commons SQL datamodel using XmlBeans and Velocity</B></FONT></FONT></P>
<P ALIGN=CENTER STYLE="margin-bottom: 0in"><FONT FACE="Times, serif"><FONT SIZE=3><I><B>Philip
Mark Donaghy</B></I></FONT></FONT></P>
<H1 CLASS="western">1 <FONT FACE="Times, serif">About Vxsdb</FONT></H1>
<P><FONT SIZE=3><FONT FACE="Times, serif">Vxsdb is a sample XmlBeans
application which derives a Jakarta Commons SQL data model from an
xml schema. It was conceived from things I have learned from using
XmlBeans and talking to people at the ASF conference.</FONT></FONT></P>
<P><FONT FACE="Times, serif">Vxsdb uses Jakarta Velocity as its
templating engine. At runtime a SchemaTypeSystem XmlBeans object is
created from compiling an xml schema. This object is placed in a
Velocity context. A template processes the objects global elements,
global types and generates a Jakarta Commons SQL xml datamodel
descriptor of tables and columns.</FONT></P>
<H2 CLASS="western">1.1 Requirements</H2>
<P><FONT FACE="Times, serif">Java 1.5</FONT></P>
<H2 CLASS="western">1.2 Getting Started</H2>
<P><FONT FACE="Times, serif">The basic utilization compiles the
sample and produces a database schema for a given xml schema.</FONT></P>
<P><FONT FACE="Times, serif">Execute the command “ant”</FONT></P>
<P><FONT FACE="Times, serif">This compiles the sample.</FONT></P>
<P><FONT FACE="Times, serif">Execute the command “ant -f run.xml”</FONT></P>
<P><FONT FACE="Times, serif">This creates the Jakarta Commons SQL
datamodel.xml and creates the create.sql ddl.</FONT></P>
<H2 CLASS="western"><FONT FACE="Bitstream Vera Sans">1.3
Configuration</FONT></H2>
<P><FONT FACE="Times, serif">Vxsdb can be configured by modifying the
command line parameters to specify another template, output or xml
schema.</FONT></P>
<P><FONT FACE="Times, serif">ant -f run.xml -Dtemplate=datamodel.vm
-Doutput=database.xml -Dschema=easypo.xsd</FONT></P>
<H2 CLASS="western">1.4 Generating database schema</H2>
<P><FONT FACE="Times, serif">Included in the sample run.xml is an Ant
target which generates the ddl used to create the database tables.
The default database is PostgreSQL.</FONT></P>
<P><FONT FACE="Times, serif">ant -f run.xml</FONT></P>
<P><FONT FACE="Times, serif">To change the target database use,</FONT></P>
<P><FONT FACE="Times, serif">ant -f run.xml -DtargetDatabase=oracle</FONT></P>
<H2 CLASS="western">1.5 Determining Tables, Columns, and Table
relationships</H2>
<P><FONT FACE="Times, serif">Tables are created from all global
elements and most global types.</FONT></P>
<P><FONT FACE="Times, serif">For each schema property the sample
application determines if it is a column, an exported key (foreign
key to another table), or an imported foreign key (another entity
who's table contains a foreign back to this entity).</FONT></P>
<P><FONT FACE="Times, serif">If a schema property (attribute or
element) is a simple type without restriction a column is created and
one of the following Commons SQL values is assigned to the property.
DATE, DECIMAL, FLOAT, INTEGER, TIME, TIMESTAMP, or VARCHAR.</FONT></P>
<P><FONT FACE="Times, serif">If a schema property is a simple type
with a restriction then a column is created and one of the above
values is assigned in addition to a size attribute.</FONT></P>
<P><FONT FACE="Times, serif">If a schema property is a complex type
with no maxOccurs or minOccurs (meaning that it is required) then a
foreign key column is entered into the database table descriptor and
the required attribute is set to true.</FONT></P>
<P><FONT FACE="Times, serif">If a schema property is a complex type
with maxOccurs equal to one then a foreign key column is entered into
the database table.</FONT></P>
<P><FONT FACE="Times, serif">If a schema property is a complex type
with maxOccurs greater than one or unbounded then a imported key
(foreign key from this type's table) is required. This presents a
problem. The Velocity template may have already encountered this
complex type and created its table descriptor without even knowing
about this relationship. This is known as the Imported Key Question.</FONT></P>
<H2 CLASS="western">1.6 Solving the Imported Key Question</H2>
<P><FONT FACE="Times, serif">Iterate the SchemaTypeSystem in the Java
class to determine imported keys.</FONT></P>
<P><FONT FACE="Times, serif">Cliff told me that ms has a solution to
this which may be included in the xml schema.</FONT></P>
<H2 CLASS="western">1.7 Additional ideas</H2>
<P><FONT FACE="Times, serif"><FONT SIZE=3>Combining XmlBeans and
Velocity templates can result in other interesting xml schema related
technologies.</FONT></FONT></P>
<P><FONT FACE="Times, serif">Using a similar approach to this sample
XmlBeans and Velocity can harness the xml schema and generate
documentation, a relational database model, or even data access
objects.</FONT></P>
<H2 CLASS="western">1.8 Sample datamodel.xml</H2>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;?xml
version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;database
name=&quot;sample&quot;&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
Global Elements --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;table
name=&quot;PURCHASE_ORDER&quot;&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;PK&quot; type=&quot;INTEGER&quot; required=&quot;true&quot;
primaryKey=&quot;true&quot;/&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
T=customer@http://openuri.org/easypo --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;FK_CUSTOMER&quot; required=&quot;true&quot; type=&quot;INTEGER&quot;
/&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;foreign-key
foreignTable=&quot;CUSTOMER&quot;&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;reference
local=&quot;FK_CUSTOMER&quot; foreign=&quot;PK&quot;/&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;/foreign-key&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
T=dateTime@http://www.w3.org/2001/XMLSchema --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;DATE&quot; type=&quot;TIMESTAMP&quot; /&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
Foreign key imported from table named LINE_ITEM --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
T=shipper@http://openuri.org/easypo --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;FK_SHIPPER&quot; type=&quot;INTEGER&quot; /&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;foreign-key
foreignTable=&quot;SHIPPER&quot;&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;reference
local=&quot;FK_SHIPPER&quot; foreign=&quot;PK&quot;/&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;/foreign-key&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;/table&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
Global Types --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;table
name=&quot;CUSTOMER&quot;&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;PK&quot; type=&quot;INTEGER&quot; required=&quot;true&quot;
primaryKey=&quot;true&quot;/&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
T=string@http://www.w3.org/2001/XMLSchema --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;NAME&quot; type=&quot;VARCHAR&quot; /&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
T=string@http://www.w3.org/2001/XMLSchema --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;ADDRESS&quot; type=&quot;VARCHAR&quot; /&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
T=int@http://www.w3.org/2001/XMLSchema --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;AGE&quot; type=&quot;TINYINT&quot; /&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
T=int@http://www.w3.org/2001/XMLSchema --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;MOO&quot; type=&quot;TINYINT&quot; /&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
T=int@http://www.w3.org/2001/XMLSchema --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;POO&quot; type=&quot;TINYINT&quot; /&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;/table&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;table
name=&quot;LINE_ITEM&quot;&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;PK&quot; type=&quot;INTEGER&quot; required=&quot;true&quot;
primaryKey=&quot;true&quot;/&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
T=string@http://www.w3.org/2001/XMLSchema --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;DESCRIPTION&quot; type=&quot;VARCHAR&quot; /&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
T=decimal@http://www.w3.org/2001/XMLSchema --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;PER_UNIT_OUNCES&quot; type=&quot;DECIMAL&quot; /&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
T=decimal@http://www.w3.org/2001/XMLSchema --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;PRICE&quot; type=&quot;DECIMAL&quot; /&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
T=integer@http://www.w3.org/2001/XMLSchema --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;QUANTITY&quot; type=&quot;INTEGER&quot; /&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
Exported key --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;FK_PURCHASE_ORDER&quot; required=&quot;true&quot;
type=&quot;INTEGER&quot; /&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;foreign-key
foreignTable=&quot;PURCHASE_ORDER&quot;&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;reference
local=&quot;FK_PURCHASE_ORDER&quot; foreign=&quot;PK&quot;/&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;/foreign-key&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;/table&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;table
name=&quot;SHIPPER&quot;&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;PK&quot; type=&quot;INTEGER&quot; required=&quot;true&quot;
primaryKey=&quot;true&quot;/&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
T=string@http://www.w3.org/2001/XMLSchema --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;NAME&quot; type=&quot;VARCHAR&quot; /&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;!--
T=decimal@http://www.w3.org/2001/XMLSchema --&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;column
name=&quot;PER_OUNCE_RATE&quot; type=&quot;DECIMAL&quot; /&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;/table&gt;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>&lt;/database&gt;</FONT></FONT></P>
<H2 CLASS="western">1.9 Sample create.sql</H2>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>drop
table SHIPPER;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>drop
table LINE_ITEM;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>drop
table CUSTOMER;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>drop
table PURCHASE_ORDER;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>--
-----------------------------------------------------------------------</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>--
PURCHASE_ORDER</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>--
-----------------------------------------------------------------------</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>create
table PURCHASE_ORDER</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>(</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>PK
INTEGER NOT NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>FK_CUSTOMER
INTEGER NOT NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>DATE
TIMESTAMP NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>FK_SHIPPER
INTEGER NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>PRIMARY
KEY (PK)</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>);</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>ALTER
TABLE PURCHASE_ORDER</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>ADD
CONSTRAINT PURCHASE_ORDER_FK_1 FOREIGN KEY (FK_CUSTOMER)</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>REFERENCES
CUSTOMER (PK)</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>ALTER
TABLE PURCHASE_ORDER</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>ADD
CONSTRAINT PURCHASE_ORDER_FK_2 FOREIGN KEY (FK_SHIPPER)</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>REFERENCES
SHIPPER (PK)</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>--
-----------------------------------------------------------------------</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>--
CUSTOMER</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>--
-----------------------------------------------------------------------</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>create
table CUSTOMER</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>(</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>PK
INTEGER NOT NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>NAME
VARCHAR NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>ADDRESS
VARCHAR NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>AGE
TINYINT NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>MOO
TINYINT NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>POO
TINYINT NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>PRIMARY
KEY (PK)</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>);</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>--
-----------------------------------------------------------------------</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>--
LINE_ITEM</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>--
-----------------------------------------------------------------------</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>create
table LINE_ITEM</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>(</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>PK
INTEGER NOT NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>DESCRIPTION
VARCHAR NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>PER_UNIT_OUNCES
DECIMAL NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>PRICE
DECIMAL NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>QUANTITY
INTEGER NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>FK_PURCHASE_ORDER
INTEGER NOT NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>PRIMARY
KEY (PK)</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>);</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>ALTER
TABLE LINE_ITEM</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>ADD
CONSTRAINT LINE_ITEM_FK_1 FOREIGN KEY (FK_PURCHASE_ORDER)</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>REFERENCES
PURCHASE_ORDER (PK)</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>;</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>--
-----------------------------------------------------------------------</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>--
SHIPPER</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>--
-----------------------------------------------------------------------</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>create
table SHIPPER</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>(</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>PK
INTEGER NOT NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>NAME
VARCHAR NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>PER_OUNCE_RATE
DECIMAL NULL ,</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>PRIMARY
KEY (PK)</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><FONT FACE="Monospace"><FONT SIZE=2>);</FONT></FONT></P>
<P STYLE="margin-bottom: 0in"><BR>
</P>
<P><BR><BR>
</P>
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