SORTKEY / DISTKEY When writing data to redshift using AWS Glue

How do I add a sort / dist key to the glue dynamicframe writer into redshift?

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分析数据库

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AWS Glue 提取变换和加载数据 Amazon Redshift

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English

mugiwara

已提问 3 个月前159 查看次数

1 回答

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That is part of the table DDL, not the writing itself.
You could have the table previously created with the sort/dist keys as needed, or if you need to create the table dynamically, you could add a preaction to create the table as needed or a post action to alter the table to do that tweaking

专家

Gonzalo Herreros

已回答 3 个月前

mugiwara

3 个月前

I've tried using a post-action like this:,

datasink = glueContext.write_dynamic_frame.from_options(
    frame=dyf,
    connection_type="redshift",
    connection_options={
        "redshiftTmpDir": "..",
        "dbtable": "..",
        "connectionName": "..",
        "postactions": "ALTER TABLE <TABLE> ALTER DISTSTYLE KEY DISTKEY <DIST-COLUMN>, ALTER SORTKEY (<SORT-COLUM-A>, <SORT-COLUMN-B>);"
    },
    transformation_ctx="..",
)

but the problem with specifying them for this problem is that everything works fine the first time the table is created. On subsequent runs, the job fails because you cannot specify THE SAME sort / dist key on the table.

So is there a way to suppress or ignore errors from the post-actions?

SORTKEY / DISTKEY When writing data to redshift using AWS Glue

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