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  1. Spark
  2. SPARK-11412

Support merge schema for ORC

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    Details

    • Type: New Feature
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 1.6.3, 2.0.0, 2.1.1, 2.2.0, 2.3.4, 2.4.5
    • Fix Version/s: 3.0.0
    • Component/s: SQL
    • Labels:
      None

      Description

      when I tried to load partitioned orc files with a slight difference in a nested column. say
      column
      – request: struct (nullable = true)

        – datetime: string (nullable = true)
        – host: string (nullable = true)
        – ip: string (nullable = true)
        – referer: string (nullable = true)
        – request_uri: string (nullable = true)
        – uri: string (nullable = true)
        – useragent: string (nullable = true)
      And then there's a page_url_lists attributes in the later partitions.

      I tried to use
      val s = sqlContext.read.format("orc").option("mergeSchema", "true").load("/data/warehouse/xxxx") to load the data.
      But the schema doesn't show request.page_url_lists.
      I am wondering if schema merge doesn't work for orc?

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              • Assignee:
                EdisonWang EdisonWang
                Reporter:
                dzhao11 Dave
              • Votes:
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                Dates

                • Created:
                  Updated:
                  Resolved: