@Override public String vectorExpressionParameters() {
    return super.vectorExpressionParameters() + ", format pattern: " + sqlFormatter.getPattern();
  }
Vectorized UDF for CAST (&lt;DATE&gt; TO CHAR(&lt;LENGTH&gt;) WITH FORMAT &lt;STRING&gt;).
ql/src/java/org/apache/hadoop/hive/ql/exec/vector/expressions/CastDateToCharWithFormat.java