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[window] Disable GPU for COUNT(exp) queries #666

Merged
merged 1 commit into from
Sep 5, 2020
Merged

[window] Disable GPU for COUNT(exp) queries #666

merged 1 commit into from
Sep 5, 2020

Commits on Sep 3, 2020

  1. [window] Disable GPU for COUNT(exp) queries 

    GpuWindowExec currently counts null-rows when running COUNT(col)
(or generally COUNT(expr)) window queries, owing to a bug in CUDF/Java.
Left unchecked, this will produce incorrect results for said queries.

This commit disables GPU acceleration for COUNT(expr) queries, while
retaining support for COUNT(1) and COUNT(*).

This may be reverted once we have a fix in CUDF/Java.

Signed-off-by: Mithun RK <mythrocks@gmail.com>
    @mythrocks
    mythrocks committed Sep 3, 2020
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