[SPARK-12068][SQL] use a single column in Dataset.groupBy and count will fail#10059
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cloud-fan wants to merge 1 commit into
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[SPARK-12068][SQL] use a single column in Dataset.groupBy and count will fail#10059cloud-fan wants to merge 1 commit into
cloud-fan wants to merge 1 commit into
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cc @marmbrus |
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Test build #46945 has finished for PR 10059 at commit
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retest this please. |
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Test build #46962 has finished for PR 10059 at commit
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Thanks, merging to master and 1.6 |
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…ill fail The reason is that, for a single culumn `RowEncoder`(or a single field product encoder), when we use it as the encoder for grouping key, we should also combine the grouping attributes, although there is only one grouping attribute. Author: Wenchen Fan <wenchen@databricks.com> Closes #10059 from cloud-fan/bug. (cherry picked from commit 8ddc55f) Signed-off-by: Michael Armbrust <michael@databricks.com>
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The reason is that, for a single culumn
RowEncoder(or a single field product encoder), when we use it as the encoder for grouping key, we should also combine the grouping attributes, although there is only one grouping attribute.