February 2022
Intermediate to advanced
360 pages
11h 47m
Polish
Content preview from Spark
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Rozdział 4. Spark SQL i DataFrame — wprowadzenie do wbudowanych źródeł danych
W poprzednim rozdziale omówiliśmy ewolucję struktury w Sparku i uzasadniliśmy jej istnienie. Przede wszystkim wyjaśniliśmy, w jaki sposób silnik Spark SQL zapewnia ujednolicone podstawy, na których opierają się wysokiego poziomu API DataFrame i Dataset. W tej części książki będziemy kontynuować omawianie DataFrame i pokażemy, na jakiej zasadzie wspomniane API może współpracować z silnikiem Spark SQL.
Ten i następny rozdział wyjaśnią, jak Spark SQL współdziała z wybranymi komponentami zewnętrznymi, które zostały pokazane na rysunku 4.1.
Rysunek 4.1. Interfejsy i źródła ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.