paul-rogers commented on issue #1913: DRILL-6953: EVF-based version of the JSON reader URL: https://github.com/apache/drill/pull/1913#issuecomment-573497529 Turns out that the v1 JSON reader will ignore all-null columns. In the test `TestStarQueries.testSelStarOrderBy`, we execute the following query: ``` select * from cp.`employee.json` order by last_name ``` Against the Foodmart file `customer.json` which has records like this: ``` {"employee_id":53,...","end_date":null,"salary":...} ``` The test is written to exclude `end_date` from a `SELECT *` query. In V2, however, `end_date` is included in the query. One can argue that 'SELECT *' means "return all columns", not "return all columns except those that happen to be null in the first batch." See DRILL-7522. Modified the test to expect the old result for the V1 reader, the correct result for the V2. reader.
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