Question; Answer; Project
What is the aggregate function singleValueOrNull used to implement?; subquery operators; ClickHouse
What checks if there is only one unique non-NULL value in the data?; singleValueOrNull; ClickHouse
If there are zero or at least two distinct values, what does singleValueOrNull return?; NULL; ClickHouse
What is the unique value if there is only one unique non-NULL value in x?; NULL; ClickHouse
What does ASF stand for?; Apache Software Foundation; Druid
What does the ASF license this file to you under?; Apache License, Version 2.0; Druid
What is the primary goal of the integration setup?; the ability to quickly debug the Druid image and any individual tests; Druid
What is the second step of the integration setup?; ensure each test can run in JUnit in an IDE against a cluster you start by hand; Druid
What is a key goal of the revised structure?; Ease of debugging; Druid