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https://issues.apache.org/jira/browse/SPARK-34751?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nivas Umapathy updated SPARK-34751:
-----------------------------------
Attachment: invalid_columns_double.parquet
> Parquet with invalid chars on column name reads double as null when a clean
> schema is applied
> ---------------------------------------------------------------------------------------------
>
> Key: SPARK-34751
> URL: https://issues.apache.org/jira/browse/SPARK-34751
> Project: Spark
> Issue Type: Bug
> Components: Input/Output
> Affects Versions: 2.4.3
> Environment: Pyspark 2.4.3
> AWS Glue Dev Endpoint EMR
> Reporter: Nivas Umapathy
> Priority: Major
> Fix For: 2.4.8
>
> Attachments: invalid_columns_double.parquet
>
>
> I have a parquet file that has data with invalid column names on it.
> [#Reference](https://issues.apache.org/jira/browse/SPARK-27442) Here is the
> file [Invalid Header
> Parquet|https://drive.google.com/file/d/101WNWXnPwhjocSMVjkhn5jo85Ri_NydP/view?usp=sharing].
> I tried to load this file with
> {{df = glue_context.read.parquet('invalid_columns_double.parquet')}}
> {{df = df.withColumnRenamed('COL 1', 'COL_1')}}
> {{df = df.withColumnRenamed('COL,2', 'COL_2')}}
> {{df = df.withColumnRenamed('COL;3', 'COL_3') }}
> and so on.
> Now if i call
> {{df.show()}}
> it throws this exception that is still pointing to the old column name.
> {{pyspark.sql.utils.AnalysisException: 'Attribute name "COL 1" contains
> invalid character(s) among " ,;{}()\\n\\t=". Please use alias to rename
> it.;'}}
>
> When i read about it in some blogs, there was suggestion to re-read the same
> parquet with new schema applied. So i did
> {{df =
> glue_context.read.schema(df.schema).parquet(}}{{'invalid_columns_double.parquet')}}{{}}
>
> and it works, but all the data in the dataframe are null. The same works for
> Strings
>
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