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(2) PL/Rについて PL/Rとは: PostgreSQL用R手続き型言語(R Procedural Language for PostgreSQL)です。DBMS環境でR言語の分析機能や可視化機能を呼び出すことが可能になります。 http://www.joeconway.com/oscon-pres-2003-1.pdf (以下PDFより一部抜粋) メリット: ・Leverage people's knowledge and skills – statistics is a specialty not common amongst database developers ・Leverage hardware ・Processing/bandwidth efficiency ・Consistency of analysis ・Abstraction of complexity デメリット: ・PostgreSQL user: – Slower than standard SQL aggregates (e.g. AVG) for simple cases – New language to learn ・R user: – Debugging more challenging than working directly in R – Less flexible for ad hoc analysis
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