mingmwang commented on code in PR #5772:
URL: https://github.com/apache/arrow-datafusion/pull/5772#discussion_r1151727664
##########
datafusion/physical-expr/src/sort_expr.rs:
##########
@@ -69,4 +62,73 @@ impl PhysicalSortExpr {
options: Some(self.options),
})
}
+
+ /// Check whether sort expression satisfies `PhysicalSortRequirement`.
+ // If sort options is Some in `PhysicalSortRequirement`, `expr` and
`options` field are compared for equality.
+ // If sort options is None in `PhysicalSortRequirement`, only `expr` is
compared for equality.
+ pub fn satisfy(&self, requirement: &PhysicalSortRequirement) -> bool {
+ self.expr.eq(&requirement.expr)
+ && requirement
+ .options
+ .map_or(true, |opts| self.options == opts)
+ }
+}
+
+/// Represents sort requirement associated with a plan
+#[derive(Clone, Debug)]
+pub struct PhysicalSortRequirement {
+ /// Physical expression representing the column to sort
+ pub expr: Arc<dyn PhysicalExpr>,
+ /// Option to specify how the given column should be sorted.
+ /// If unspecified, there is no constraint on sort options.
+ pub options: Option<SortOptions>,
+}
+
+impl From<PhysicalSortExpr> for PhysicalSortRequirement {
+ fn from(value: PhysicalSortExpr) -> Self {
+ Self {
+ expr: value.expr,
+ options: Some(value.options),
+ }
+ }
+}
+
+impl PartialEq for PhysicalSortRequirement {
+ fn eq(&self, other: &PhysicalSortRequirement) -> bool {
+ self.options == other.options && self.expr.eq(&other.expr)
+ }
+}
+
+impl std::fmt::Display for PhysicalSortRequirement {
+ fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+ let opts_string = self.options.as_ref().map_or("NA", to_str);
+ write!(f, "{} {}", self.expr, opts_string)
+ }
+}
+
+impl PhysicalSortRequirement {
+ /// Returns whether this requirement is equal or more specific than
`other`.
+ pub fn compatible(&self, other: &PhysicalSortRequirement) -> bool {
+ self.expr.eq(&other.expr)
+ && other.options.map_or(true, |other_opts| {
+ self.options.map_or(false, |opts| opts == other_opts)
+ })
+ }
+}
+
Review Comment:
👍
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