public Boolean getUpsert() {
        return this.upsert;
    }
<p>
The action used on Redshift sinks when doing an APPEND.
</p>

@return The action used on Redshift sinks when doing an APPEND.
aws-java-sdk-glue/src/main/java/com/amazonaws/services/glue/model/AmazonRedshiftNodeData.java