alamb commented on code in PR #2797:
URL: https://github.com/apache/arrow-datafusion/pull/2797#discussion_r907787029
##########
datafusion/physical-expr/src/expressions/datetime.rs:
##########
@@ -86,76 +89,114 @@ impl PhysicalExpr for DateIntervalExpr {
let dates = self.lhs.evaluate(batch)?;
let intervals = self.rhs.evaluate(batch)?;
- let interval = match intervals {
- ColumnarValue::Scalar(interval) => match interval {
- ScalarValue::IntervalDayTime(Some(interval)) => interval as
i32,
- ScalarValue::IntervalYearMonth(Some(_)) => {
- return Err(DataFusionError::Execution(
- "DateIntervalExpr does not support
IntervalYearMonth".to_string(),
- ))
- }
- ScalarValue::IntervalMonthDayNano(Some(_)) => {
- return Err(DataFusionError::Execution(
- "DateIntervalExpr does not support
IntervalMonthDayNano"
- .to_string(),
- ))
- }
- other => {
- return Err(DataFusionError::Execution(format!(
- "DateIntervalExpr does not support non-interval type
{:?}",
- other
- )))
- }
- },
- _ => {
- return Err(DataFusionError::Execution(
- "Columnar execution is not yet supported for
DateIntervalExpr"
- .to_string(),
- ))
+ // Unwrap days since epoch
+ let operand = match dates {
+ ColumnarValue::Scalar(scalar) => scalar,
+ _ => Err(DataFusionError::Execution(
+ "Columnar execution is not yet supported for DateIntervalExpr"
+ .to_string(),
+ ))?,
+ };
+
+ // Convert to NaiveDate
+ let epoch = NaiveDate::from_ymd(1970, 1, 1);
+ let prior = match operand {
+ ScalarValue::Date32(Some(date)) => {
+ epoch.add(chrono::Duration::days(date as i64))
}
+ ScalarValue::Date64(Some(date)) =>
epoch.add(chrono::Duration::days(date)),
+ _ => Err(DataFusionError::Execution(format!(
+ "Invalid lhs type for DateIntervalExpr: {:?}",
+ operand
+ )))?,
};
- match dates {
- ColumnarValue::Scalar(scalar) => match scalar {
- ScalarValue::Date32(Some(date)) => match &self.op {
- Operator::Plus =>
Ok(ColumnarValue::Scalar(ScalarValue::Date32(
- Some(date + interval),
- ))),
- Operator::Minus =>
Ok(ColumnarValue::Scalar(ScalarValue::Date32(
- Some(date - interval),
- ))),
- _ => {
- // this should be unreachable because we check the
operators in `try_new`
- Err(DataFusionError::Execution(
- "Invalid operator for
DateIntervalExpr".to_string(),
- ))
- }
- },
- ScalarValue::Date64(Some(date)) => match &self.op {
- Operator::Plus =>
Ok(ColumnarValue::Scalar(ScalarValue::Date64(
- Some(date + interval as i64),
- ))),
- Operator::Minus =>
Ok(ColumnarValue::Scalar(ScalarValue::Date64(
- Some(date - interval as i64),
- ))),
- _ => {
- // this should be unreachable because we check the
operators in `try_new`
- Err(DataFusionError::Execution(
- "Invalid operator for
DateIntervalExpr".to_string(),
- ))
- }
- },
- _ => {
- // this should be unreachable because we check the types
in `try_new`
- Err(DataFusionError::Execution(
- "Invalid lhs type for DateIntervalExpr".to_string(),
- ))
- }
- },
+ // Unwrap interval to add
+ let scalar = match &intervals {
+ ColumnarValue::Scalar(interval) => interval,
_ => Err(DataFusionError::Execution(
"Columnar execution is not yet supported for DateIntervalExpr"
.to_string(),
- )),
- }
+ ))?,
+ };
+
+ // Negate for subtraction
+ let interval = match &scalar {
+ ScalarValue::IntervalDayTime(Some(interval)) => *interval,
+ ScalarValue::IntervalYearMonth(Some(interval)) => *interval as i64,
+ ScalarValue::IntervalMonthDayNano(Some(_interval)) => {
+ Err(DataFusionError::Execution(
+ "DateIntervalExpr does not support
IntervalMonthDayNano".to_string(),
+ ))?
+ }
+ other => Err(DataFusionError::Execution(format!(
+ "DateIntervalExpr does not support non-interval type {:?}",
+ other
+ )))?,
+ };
+ let interval = match &self.op {
+ Operator::Plus => interval,
+ Operator::Minus => -interval,
+ _ => {
+ // this should be unreachable because we check the operators
in `try_new`
+ Err(DataFusionError::Execution(
+ "Invalid operator for DateIntervalExpr".to_string(),
+ ))?
+ }
+ };
+
+ // Add interval
+ let posterior = match scalar {
+ ScalarValue::IntervalDayTime(Some(_)) => {
+ prior.add(chrono::Duration::days(interval))
+ }
+ ScalarValue::IntervalYearMonth(Some(_)) => {
+ let target = add_months(prior, interval);
+ let target_plus = add_months(target, 1);
+ let last_day = target_plus.sub(chrono::Duration::days(1));
+ let day = min(prior.day(), last_day.day());
Review Comment:
Thank you @avantgardnerio
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