THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Semantic of cache() method
The semantic of the cache() method is a little different depending on whether auto caching is enabled or not.
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TableEnvironment tEnv = ... Table t1 = ... Table t2 = t1.cache() ... tEnv.execute() // t1 is cached. Table t3 = t1.select(...) // cache will NOT be used. Table t4 = t2.select(...) // cache will be used. ... // The following two lines of code are equivalent t1.invalidateCache() // cache will be released t2.invalidateCache() // cache will be released ... t1.print() // cache will NOT be recreated t2.print() // cache will be recreated |
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