public SnowflakeNodeData withUpsert(Boolean upsert) {
        setUpsert(upsert);
        return this;
    }
<p>
Used when Action is <code>append</code>. Specifies the resolution behavior when a row already exists. If true,
preexisting rows will be updated. If false, those rows will be inserted.
</p>

@param upsert
       Used when Action is <code>append</code>. Specifies the resolution behavior when a row already exists. If
       true, preexisting rows will be updated. If false, those rows will be inserted.
@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/SnowflakeNodeData.java