My Learnings and Sharing...RaNd0m!!
Saturday, September 2, 2017
User Defined Function (UDF) : HP Vertica
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UDF combines repeated (or complex) SQL or other task into one unit that can be reused. Lets explore this feature in Vertica. There are fiv...
Create Web Service SOAP request from WSDL and call service
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In general, we generate stubs or use some XML builder to create SOAP request. This works for already known web services. Here, I am describ...
My First Predictive Modeling With R : Using Caret Package
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The caret package was developed to: create a unified interface for modeling and prediction (interfaces to 147 models) streamline mod...
Wednesday, August 30, 2017
Java NIO2: Non-Blocking, Asynchronous and Zero-copy IO
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Java NIO2 provides Channel API for File system based and Network/Socket based IO. Useful links: AsynchronousChannel interface: ...
Tuesday, January 28, 2014
Mustache Template in Talend ETL
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This blog is about using Mustache template in ETL/ELT to generate rich textual output like HTML, JSON, XML etc from data in ETL flow. Fir...
Wednesday, January 15, 2014
Talend Elasticsearch Indexing Tutorial
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We are going to do indexing data in existing Elasticsearch server in ETL/ELT flow . Prerequisites: Talend Studio Elasticsearch Indexi...
Count (*) : Cassandra Data Modeling
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How to model Cassandra for count queries? Consider same "playlist" database from previous post . We need to do following quer...
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