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https://issues.apache.org/jira/browse/SPARK-25881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16668442#comment-16668442
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Apache Spark commented on SPARK-25881:
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User '351zyf' has created a pull request for this issue:
https://github.com/apache/spark/pull/22891
> pyspark df.topandas() deal decimal type as object
> -------------------------------------------------
>
> Key: SPARK-25881
> URL: https://issues.apache.org/jira/browse/SPARK-25881
> Project: Spark
> Issue Type: Improvement
> Components: PySpark
> Affects Versions: 2.3.2
> Reporter: JohnsonZhang
> Priority: Minor
>
> >>> for i in df_spark.dtypes:
> ... print(i)
> ...
> ('dt', 'string')
> ('cost_sum', 'decimal(38,3)')
> ('req_sum', 'bigint')
> ('pv_sum', 'bigint')
> ('click_sum', 'bigint')
> the 'cost_sum' column turn to object type when using toPandas()
> >>> df_pd.dtypes
> dt object
> cost_sum object
> req_sum int64
> pv_sum int64
> click_sum int64
> dtype: object
>
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