marvinlanhenke commented on code in PR #367:
URL: https://github.com/apache/iceberg-rust/pull/367#discussion_r1636945871
##########
crates/iceberg/src/expr/visitors/manifest_evaluator.rs:
##########
@@ -103,98 +106,255 @@ impl BoundPredicateVisitor for ManifestFilterVisitor<'_>
{
reference: &BoundReference,
_predicate: &BoundPredicate,
) -> crate::Result<bool> {
- todo!()
+ let field = self.field_summary_for_reference(reference);
+
+ // contains_null encodes whether at least one partition value is null,
+ // lowerBound is null if all partition values are null
+ if ManifestFilterVisitor::are_all_null(field,
&reference.field().field_type) {
+ ROWS_CANNOT_MATCH
+ } else {
+ ROWS_MIGHT_MATCH
+ }
}
fn is_nan(
&mut self,
reference: &BoundReference,
_predicate: &BoundPredicate,
) -> crate::Result<bool> {
- Ok(self
- .field_summary_for_reference(reference)
- .contains_nan
- .is_some())
+ let field = self.field_summary_for_reference(reference);
+ if let Some(contains_nan) = field.contains_nan {
+ if !contains_nan {
+ return ROWS_CANNOT_MATCH;
+ }
+ }
+
+ if ManifestFilterVisitor::are_all_null(field,
&reference.field().field_type) {
+ return ROWS_CANNOT_MATCH;
+ }
+
+ ROWS_MIGHT_MATCH
}
fn not_nan(
&mut self,
reference: &BoundReference,
_predicate: &BoundPredicate,
) -> crate::Result<bool> {
- todo!()
+ let field = self.field_summary_for_reference(reference);
+ if let Some(contains_nan) = field.contains_nan {
+ // check if all values are nan
+ if contains_nan && !field.contains_null &&
field.lower_bound.is_none() {
+ return ROWS_CANNOT_MATCH;
+ }
+ }
+ ROWS_MIGHT_MATCH
}
fn less_than(
&mut self,
reference: &BoundReference,
- literal: &Datum,
+ datum: &Datum,
_predicate: &BoundPredicate,
) -> crate::Result<bool> {
- todo!()
+ let field = self.field_summary_for_reference(reference);
+ match &field.lower_bound {
+ Some(bound) if datum <= bound => ROWS_CANNOT_MATCH,
+ Some(_) => ROWS_MIGHT_MATCH,
+ None => ROWS_CANNOT_MATCH,
+ }
}
fn less_than_or_eq(
&mut self,
reference: &BoundReference,
- literal: &Datum,
+ datum: &Datum,
_predicate: &BoundPredicate,
) -> crate::Result<bool> {
- todo!()
+ let field = self.field_summary_for_reference(reference);
+ match &field.lower_bound {
+ Some(bound) if datum < bound => ROWS_CANNOT_MATCH,
+ Some(_) => ROWS_MIGHT_MATCH,
+ None => ROWS_CANNOT_MATCH,
+ }
}
fn greater_than(
&mut self,
reference: &BoundReference,
- literal: &Datum,
+ datum: &Datum,
_predicate: &BoundPredicate,
) -> crate::Result<bool> {
- todo!()
+ let field = self.field_summary_for_reference(reference);
+ match &field.upper_bound {
+ Some(bound) if datum >= bound => ROWS_CANNOT_MATCH,
+ Some(_) => ROWS_MIGHT_MATCH,
+ None => ROWS_CANNOT_MATCH,
+ }
}
fn greater_than_or_eq(
&mut self,
reference: &BoundReference,
- literal: &Datum,
+ datum: &Datum,
_predicate: &BoundPredicate,
) -> crate::Result<bool> {
- todo!()
+ let field = self.field_summary_for_reference(reference);
+ match &field.upper_bound {
+ Some(bound) if datum > bound => ROWS_CANNOT_MATCH,
+ Some(_) => ROWS_MIGHT_MATCH,
+ None => ROWS_CANNOT_MATCH,
+ }
}
fn eq(
&mut self,
reference: &BoundReference,
- literal: &Datum,
+ datum: &Datum,
_predicate: &BoundPredicate,
) -> crate::Result<bool> {
- todo!()
+ let field = self.field_summary_for_reference(reference);
+
+ if field.lower_bound.is_none() || field.upper_bound.is_none() {
+ return ROWS_CANNOT_MATCH;
+ }
+
+ if let Some(lower_bound) = &field.lower_bound {
+ if lower_bound > datum {
+ return ROWS_CANNOT_MATCH;
+ }
+ }
+
+ if let Some(upper_bound) = &field.upper_bound {
+ if upper_bound < datum {
+ return ROWS_CANNOT_MATCH;
+ }
+ }
+
+ ROWS_MIGHT_MATCH
}
fn not_eq(
&mut self,
- reference: &BoundReference,
- literal: &Datum,
+ _reference: &BoundReference,
+ _datum: &Datum,
_predicate: &BoundPredicate,
) -> crate::Result<bool> {
- todo!()
+ // because the bounds are not necessarily a min or max value, this
cannot be answered using
+ // them. notEq(col, X) with (X, Y) doesn't guarantee that X is a value
in col.
+ ROWS_MIGHT_MATCH
}
fn starts_with(
&mut self,
reference: &BoundReference,
- literal: &Datum,
+ datum: &Datum,
_predicate: &BoundPredicate,
) -> crate::Result<bool> {
- todo!()
+ let field = self.field_summary_for_reference(reference);
+
+ if field.lower_bound.is_none() || field.upper_bound.is_none() {
+ return ROWS_CANNOT_MATCH;
+ }
+
+ let PrimitiveLiteral::String(prefix) = datum.literal() else {
+ return Err(Error::new(
+ ErrorKind::Unexpected,
+ "Cannot perform starts_with on non-string value",
+ ));
+ };
+
+ let prefix_len = prefix.len();
+
+ if let Some(lower_bound) = &field.lower_bound {
+ let PrimitiveLiteral::String(lower_bound) = lower_bound.literal()
else {
+ return Err(Error::new(
+ ErrorKind::Unexpected,
+ "Cannot perform starts_with on non-string lower bound",
+ ));
+ };
+
+ let min_len = lower_bound.len().min(prefix_len);
+ if prefix.as_bytes().lt(&lower_bound.as_bytes()[..min_len]) {
+ return ROWS_CANNOT_MATCH;
+ }
+ }
+
+ if let Some(upper_bound) = &field.upper_bound {
+ let PrimitiveLiteral::String(upper_bound) = upper_bound.literal()
else {
+ return Err(Error::new(
+ ErrorKind::Unexpected,
+ "Cannot perform starts_with on non-string upper bound",
+ ));
+ };
Review Comment:
> (e.g. lines 283 to 289)
@s-akhtar-baig those were the lines I was referring to.
Perhaps something like this might work (nothing fancy)?
```Rust
// this should be enough?
fn check_bounds(datum: &Datum ) -> Result<&String> {
let PrimitiveLiteral::String(boundary) = datum.literal() else {
return Err(Error::new(ErrorKind::Unexpected, "Cannot perform..."));
};
Ok(boundary)
}
// and then
if let Some(upper_bound) = &field.upper_bound {
let boundary = Self::check_bounds(upper_bound)?;
// ...proceed with custom checks
}
```
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