public AggregateOperation withColumn(String... column) {
        if (this.column == null) {
            setColumn(new java.util.ArrayList<String>(column.length));
        }
        for (String ele : column) {
            this.column.add(ele);
        }
        return this;
    }
<p>
Specifies the column on the data set on which the aggregation function will be applied.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setColumn(java.util.Collection)} or {@link #withColumn(java.util.Collection)} if you want to override the
existing values.
</p>

@param column
       Specifies the column on the data set on which the aggregation function will be applied.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-glue/src/main/java/com/amazonaws/services/glue/model/AggregateOperation.java