test_sort.py declared 'max_sort_run_size' query option, but it
silently did not exercise it. Fixing the query option declaration
in IMPALA-13349 using helper function add_exec_option_dimension()
revealed a DCHECK failure in sorter.cc. In some cases the length
of an in-memory run could exceed 'max_sort_run_size' by 1 page.
This patch fixed the DCHECK failure by strictly enforcing the
'max_sort_run_size' limit.
Memory limits were also adjusted in test_sort.py according to
the memory usage of the different sort run sizes.
Additionally, the 'MAX_SORT_RUN_SIZE' query option's valid range was
relaxed. Instead of throwing an error, negative values also disable
the run size limitation, just as the default: '0'.
Testing:
- E2E tests in sort.py
- set test
Change-Id: I943d8edcc87df168448a174d6c9c6b46fe960eae
Reviewed-on: http://gerrit.cloudera.org:8080/21777
Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
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