[jira] [Created] (SPARK-26335) Add an option for Dataset#show not to care about wide characters when padding them

["Keiji Yoshida (JIRA)" <ji...@apache.org>]

Keiji Yoshida created SPARK-26335:
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             Summary: Add an option for Dataset#show not to care about wide characters when padding them
                 Key: SPARK-26335
                 URL: https://issues.apache.org/jira/browse/SPARK-26335
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 2.4.0
            Reporter: Keiji Yoshida


https://issues.apache.org/jira/browse/SPARK-25108 makes Dataset#show care about wide characters when padding them. That is useful for humans to read a result of Dataset#show. On the other hand, that makes it impossible for programs to parse a result of Dataset#show because each cell's length can be difference from its header's length. My company develops and manages a Jupyter/Apache Zeppelin-like visualization tool named "OASIS" ([https://databricks.com/session/oasis-collaborative-data-analysis-platform-using-apache-spark]). On this application, a result of Dataset#show is parsed to visualize it as an HTML table format.

So, it is preferable to add an option for Dataset#show not to care about wide characters when padding them by adding a parameter such as "fixedColLength" to Dataset#show.



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