public boolean equals(Object obj) {
if (obj instanceof ColumnStat) {
ColumnStat other = (ColumnStat) obj;
return getColumn().equals(other.getColumn())
&& getNumDistValues().equals(other.getNumDistValues())
&& getNumNulls().equals(other.getNumNulls())
&& TUtil.checkEquals(getMinValue(), other.getMinValue())
&& TUtil.checkEquals(getMaxValue(), other.getMaxValue());
} else {
return false;
}
}
