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Space in Column names when writing to Hive

JohnJustus
New Contributor III

All,

I have the following code.
df_Warehouse_Utilization = (

    spark.table("hive_metastore.dev_ork.bin_item_detail")
    .join(df_DIM_Bins,col('bin_tag')==df_DIM_Bins.BinKey,'right')
    .groupby(col('BinKey'))
    .agg(count_distinct(when(col('serial_lot_tag')>0,col('serial_lot_tag'))).alias('SerialLotCount'),
         count_distinct(when(col('tracking_tag')>0,col('tracking_tag'))).alias('Track Count'),
          min(col('activation_time')).alias('OldestStorageTime')
    )
    .withColumn('BinUsedFlag',when(col('PartNumbers')>0,1).otherwise(0))

)
df_Warehouse_Utilization.write.mode("overwrite").format("delta").saveAsTable("yorkgold.df_DIM_Binsst")
display(df_Warehouse_Utilization)

when I write to table after the above transformation, the following error occurs.
AnalysisException: Found invalid character(s) among ' ,;{}()\n\t=' in the column names of your schema.

The issue is because I have the space in the column name (Track Count, please see the above highlighted), As soon as I rename column as (TrackCount), I am able to write to Hive.
So my question is, space is not allowed? Or is there any other option?

2 REPLIES 2

daniel_sahal
Esteemed Contributor

@JohnJustus You can try using backticks (`) to escape a column names that contains spaces, but the suggestion here is to get rid of spaces or any special characters in a column names.

Thank you Daniel

So I have my code below with back stick but still doesn't work -   col('bin_type').alias(`'Bin Type'`),

Can you please correct me?

df_Bins_Step1 = (
    spark.table("hive_metastore.dev_fivetranpoc_york.bin_master")
    .select(col('tag_number').alias('BinKey'),
        col('bin').alias('Bin'),
        col('bin_type').alias(`'Bin Type'`),
        col('zone').alias('Zone'))
)
display(df_Bins_Step1)

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