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Dynamic column names using DIH (DataImportHandler)

Is there a way to create dynamic column (as a key/value) names using the values returned from the query throw DIH (DataImportHandler)?

For example:

<entity name="foo" dataSource="my_database" query="select key,value from foo where id=${item.id}">
   <field column="${foo.key}" value="${foo.value}" name="${foo.key}_s"/>
</entity>

??

like image 990
Ehab Al-Hakawati Avatar asked Oct 27 '11 14:10

Ehab Al-Hakawati


1 Answers

Use ScriptTransformer -

Example -

Data Config - Add custom field -

<script><![CDATA[
        function addfield(row){
            var fieldName = row.get('key') + "_s"
            row.put(fieldName, row.get('value'));
            return row;
        }
]]></script>

Entity mapping -

<entity name="foo" dataSource="my_database" transformer="script:addfield" query="select key,value from foo where id=${item.id}">
    ......
</entity>
like image 118
Jayendra Avatar answered Oct 25 '22 13:10

Jayendra