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From "Rui Li (JIRA)" <>
Subject [jira] [Updated] (HIVE-18111) Fix temp path for Spark DPP sink
Date Tue, 12 Dec 2017 08:57:03 GMT


Rui Li updated HIVE-18111:
    Attachment: HIVE-18111.5.patch

> Fix temp path for Spark DPP sink
> --------------------------------
>                 Key: HIVE-18111
>                 URL:
>             Project: Hive
>          Issue Type: Bug
>          Components: Spark
>            Reporter: Rui Li
>            Assignee: Rui Li
>         Attachments: HIVE-18111.1.patch, HIVE-18111.2.patch, HIVE-18111.3.patch, HIVE-18111.4.patch,
HIVE-18111.5.patch, HIVE-18111.5.patch
> Before HIVE-17877, each DPP sink has only one target work. The output path of a DPP work
is {{TMP_PATH/targetWorkId/dppWorkId}}. When we do the pruning, each map work reads DPP outputs
under {{TMP_PATH/targetWorkId}}.
> After HIVE-17877, each DPP sink can have multiple target works. It's possible that a
map work needs to read DPP outputs from multiple {{TMP_PATH/targetWorkId}}. To solve this,
I think we can have a DPP output path specific to each query, e.g. {{QUERY_TMP_PATH/dpp_output}}.
Each DPP work outputs to {{QUERY_TMP_PATH/dpp_output/dppWorkId}}. And each map work reads
from {{QUERY_TMP_PATH/dpp_output}}.

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