Daten extrahieren

Um mit dem Extractor Daten aus einer Datenbank zu extrahieren, müssen Sie die Daten, die Sie aus der Datenbank extrahieren möchten, mit Hilfe einer Extraktionsfilterdatei angeben. Der von Ihnen verwendete Extraktionsfilter hängt vom Typ der Daten ab, die Sie extrahieren möchten.

Beispiel für einen Extraktionsfilter

Im folgenden Beispiel extrahiert ein Extraktionsfilter Kategorie- und Produktinformationen aus den Tabellen  CATGROUP, CATGRPDESC, CATGRPREL, CATENTRY, CATENTSHIP, OFFER, CATENTREL, CATGPENREL, CATENTDESC und ATTRVALUE:

  <sqlx>

    <!-- **************************** -->
    <!-- extract Category information -->
    <!-- **************************** -->

    <functionDef id="Category" description="Extract Categories" schemaentity="catgroup">
      <paramDef name=":lastRecord" type="string" value="10301" description="Last record 
       before loading new data" />
      <body>
        select * from catgroup where catgroup_id > :lastRecord
      </body>
    </functionDef>

    <execute id="Category" description="Extract Categories" schemaentity="catgroup">
      <param name=":lastRecord" type="string" value="10300" description="Last record 
       before loading new data" />
    </execute>

    <functionDef id="Category Description" description="Extract Category Descriptions 
     for a Locale" schemaentity="catgrpdesc">
      <paramDef name=":lastRecord" type="string" value="10300" description="Last record 
       before loading new data" />
      <body>
        select * from catgrpdesc where catgroup_id > :lastRecord
      </body>
    </functionDef>

    <execute id="Category Description" description="Extract Category Descriptions  
     for a Locale" schemaentity="catgrpdesc">
      <param name=":lastRecord" type="string" value="10300" description="Last record 
       before loading new data" />
    </execute>

    <functionDef id="Category Relationship" description="Extract Category-Relations  
     for a Locale" schemaentity="catgrprel">
      <paramDef name=":lastRecord" type="string" value="10300" description="Last record 
       before loading new data" />
      <body>
        select * from catgrprel where catgroup_id_child > :lastRecord
      </body>
    </functionDef>

    <execute id="Category Relationship" description="Extract Category-Relations for  
     a Locale" schemaentity="catgrprel">
      <param name=":lastRecord" type="string" value="10300" description="Last record 
       before loading new data" />
    </execute>

    <!-- *************************** -->
    <!-- extract Product information -->
    <!-- *************************** -->

    <functionDef id="Product" description="Extract Product" schemaentity="catentry">
      <paramDef name=":lastrecord" type="string" value="10300" description="Last record  
       before loading new data" />
      <body>
        select * from catentry where catentry_id > :lastrecord
      </body>
    </functionDef>

    <execute id="Product" description="Extract Product" schemaentity="catentry">
      <param name=":lastrecord" type="string" value="10300" description="Last record  
       before loading new data" />
    </execute>

    <functionDef id="Product Relationship" description="Extract Product Ship 
     information" schemaentity="catentrel">
      <paramDef name=":lastrecord" type="string" value="10300" description="Last record  
       before loading new data" />
      <body>
        select * from catentrel where catentry_id_child > :lastrecord
      </body>
    </functionDef>

    <execute id="Product Relationship" description="Extract Product Ship information" 
     schemaentity="catentrel">
      <param name=":lastrecord" type="string" value="10300" description="Last record  
       before loading new data" />
    </execute>

    <functionDef id="Product Description" description="Extract Product Description" 
     schemaentity="catentdesc">
      <paramDef name=":lastrecord" type="string" value="10300" description="Last record  
       before loading new data" />
      <body>
        select * from catentdesc where catentry_id > :lastrecord
      </body>
    </functionDef>

    <execute id="Product Description" description="Extract Product Description" 
     schemaentity="catentdesc">
      <param name=":lastrecord" type="string" value="10300" description="Last record  
       before loading new data" />
    </execute>

    <functionDef id="Product Ship" description="Extract Product Ship information" 
     schemaentity="catentship">
      <paramDef name=":lastrecord" type="string" value="10300" description="Last record  
       before loading new data" />
      <body>
        select * from catentship where catentry_id > :lastrecord
      </body>
    </functionDef>

    <execute id="Product Ship" description="Extract Product Ship information" 
     schemaentity="catentship">
      <param name=":lastrecord" type="string" value="10300" description="Last record  
       before loading new data" />
    </execute>

    <functionDef id="Category Product Relationship" description="Extract Category  
     Product Relations" schemaentity="catgpenrel">
      <paramDef name=":lastrecord" type="string" value="10300" description="Last record  
       before loading new data" />
      <body>
        select * from catgpenrel where catgroup_id > :lastrecord
      </body>
    </functionDef>

    <execute id="Category Product Relationship" description="Extract Category Product 
     Relations" schemaentity="catgpenrel">
      <param name=":lastrecord" type="string" value="10300" description="Last record  
       before loading new data" />
    </execute>

    <!-- **************************************** -->
    <!-- Extract Product Attribute Information    -->
    <!-- **************************************** -->

    <functionDef id="Product Attribute Values" description="Extract Product Attribute  
     values for a Locale" schemaentity="attrvalue">
      <paramDef name=":lastrecord" type="string" value="10300" description="Last record  
       before loading new data" />
      <body>
        select * from attrvalue where catentry_id > :lastrecord
      </body>
    </functionDef>

    <execute id="Product Attribute Values" description="Extract Product Attribute values 
     for a Locale" schemaentity="attrvalue">
      <param name=":lastrecord" type="string" value="10300" description="Last record  
       before loading new data" />
    </execute>

    <!-- ************************************************* -->
    <!-- Extract Product Price Information                 -->
    <!-- ************************************************* -->

    <functionDef id="Offer" description="Extract Offer" schemaentity="offer">
      <paramDef name=":lastrecord" type="string" value="10300" description="Last record  
       before loading new data" />
      <body>
        select * from offer where catentry_id > :lastrecord
      </body>
    </functionDef>

    <execute id="Offer" description="Extract Offer" schemaentity="offer">
      <param name=":lastrecord" type="string" value="10300" description="Last record  
       before loading new data" />
    </execute>

  </sqlx>

Beispiel zum Extrahieren von Daten

Im folgenden Beispiel werden Daten zum Member-Subsystem unter Verwendung der Datei MemberSubsystemFilter.xml aus einer Datenbank extrahiert.

Windows NT Windows 2000 AIX Solaris Linux
java com.ibm.wca.MassExtract.Extract
-filter MemberSubsystemFilter.xml -outfile MemberSubsystemExtracted.xml
-dbname mall -dbuser myname  -dbpwd mypassword -customizer MemberSubsystemCustomizer

iSeries
QWEBCOMM/EXTWCSDTA FILTER(MemberSubsystemFilter.xml)
OUTFILE(MemberSubsystemExtracted.xml) DATABASE(database_name) 
SCHEMA(mall) INSTROOT(/QIBM/UserData/WebCommerce/instances/mser)
PASSWD(mypassword)

Verwandte Konzepte

Verwandte Aufgaben

Verwandte Referenzen

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