I am using Spark SQL where I want to fetch whole data everyday from a Oracle table(consist of more than 1800k records). The application is hanging up when I read from Oracle hence I used concept of partitionColumn,lowerBound & upperBound. But,the problem is how can I get lowerBound & upperBound value of primary key column dynamically?? Every day value of lowerBound & upperBound will be changing.Hence how can I get the boundary values of primary key column dynamically?? Can anyone guide me an sample example for my problem?
Spark SQL get max & min dynamically from datasource
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Just fetch required values from the database:
and pass to the main query: