[jira] [Created] (SPARK-57418) [DOCS] Add singleVariantColumn option to CSV, JSON, and XML data source options tables

["Brij Raj Kishore (Jira)" <ji...@apache.org>]

Brij Raj Kishore created SPARK-57418:
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             Summary: [DOCS] Add singleVariantColumn option to CSV, JSON, and XML data source options tables
                 Key: SPARK-57418
                 URL: https://issues.apache.org/jira/browse/SPARK-57418
             Project: Spark
          Issue Type: Documentation
          Components: SQL
    Affects Versions: 4.1.0
            Reporter: Brij Raj Kishore


The singleVariantColumn read option was introduced in Spark 4.1.0 for CSV (SPARK-51298), JSON, and XML data sources. It allows ingesting an entire record as a single VARIANT type column instead of parsing it into individual fields.

Despite being a user-facing option, it is absent from all three data source options reference tables:
- docs/sql-data-sources-csv.md
- docs/sql-data-sources-json.md
- docs/sql-data-sources-xml.md

The option is defined in:
- DataSourceOptions.scala (shared constant)
- CSVOptions.scala
- JSONOptions.scala
- XmlOptions.scala



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