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d54b75ccf1
Previously, `BaseScalarColumnReader::levels_readahead_` was not reset when the reader did not do page filtering. If a query selected the last row containing a collection value in a row group, `levels_readahead_` would be set and would not be reset when advancing to the next row group without page filtering. As a result, trying to skip collection values at the start of the next row group would cause a check failure. This patch fixes the failure by resetting `levels_readahead_` in `BaseScalarColumnReader::Reset()`, which is always called when advancing to the next row group. `levels_readahead_` is also moved out of the "Members used for page filtering" section as the variable is also used in late materialization. Testing: - Added an E2E test for the fix. Change-Id: Idac138ffe4e1a9260f9080a97a1090b467781d00 Reviewed-on: http://gerrit.cloudera.org:8080/23779 Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com> Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>