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[SPARK-7588] Document all SQL/DataFrame public methods with @since tag #6101

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[SPARK-7588] Document all SQL/DataFrame public methods with @since tag #6101

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10 changes: 10 additions & 0 deletions sql/core/src/main/java/org/apache/spark/sql/SaveMode.java
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Original file line number Diff line number Diff line change
Expand Up @@ -18,28 +18,38 @@

/**
* SaveMode is used to specify the expected behavior of saving a DataFrame to a data source.
*
* @since 1.3.0
*/
public enum SaveMode {
/**
* Append mode means that when saving a DataFrame to a data source, if data/table already exists,
* contents of the DataFrame are expected to be appended to existing data.
*
* @since 1.3.0
*/
Append,
/**
* Overwrite mode means that when saving a DataFrame to a data source,
* if data/table already exists, existing data is expected to be overwritten by the contents of
* the DataFrame.
*
* @since 1.3.0
*/
Overwrite,
/**
* ErrorIfExists mode means that when saving a DataFrame to a data source, if data already exists,
* an exception is expected to be thrown.
*
* @since 1.3.0
*/
ErrorIfExists,
/**
* Ignore mode means that when saving a DataFrame to a data source, if data already exists,
* the save operation is expected to not save the contents of the DataFrame and to not
* change the existing data.
*
* @since 1.3.0
*/
Ignore
}
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