chakkk309 commented on code in PR #22509:
URL: https://github.com/apache/datafusion/pull/22509#discussion_r3323069379
##########
datafusion/physical-expr/src/expressions/is_null.rs:
##########
@@ -102,6 +101,60 @@ impl PhysicalExpr for IsNullExpr {
self.arg.fmt_sql(f)?;
write!(f, " IS NULL")
}
+
+ #[cfg(feature = "proto")]
+ fn try_to_proto(
+ &self,
+ ctx:
&datafusion_physical_expr_common::physical_expr::proto_encode::PhysicalExprEncodeCtx<'_>,
+ ) -> Result<Option<datafusion_proto_models::protobuf::PhysicalExprNode>> {
+ use datafusion_proto_models::protobuf;
+
+ Ok(Some(protobuf::PhysicalExprNode {
+ expr_id: None,
+ expr_type: Some(protobuf::physical_expr_node::ExprType::IsNullExpr(
+ Box::new(protobuf::PhysicalIsNull {
+ expr: Some(Box::new(ctx.encode_child(&self.arg)?)),
+ }),
+ )),
+ }))
+ }
+}
+
+#[cfg(feature = "proto")]
+impl IsNullExpr {
+ /// Reconstruct an [`IsNullExpr`] from its protobuf representation.
+ ///
+ /// Takes the whole [`PhysicalExprNode`] — the exact inverse of what
+ /// [`PhysicalExpr::try_to_proto`] produces — so every expression's
+ /// `try_from_proto` shares one signature.
+ ///
+ /// [`PhysicalExprNode`]:
datafusion_proto_models::protobuf::PhysicalExprNode
+ /// [`PhysicalExpr::try_to_proto`]:
datafusion_physical_expr_common::physical_expr::PhysicalExpr::try_to_proto
+ /// [`PhysicalExprDecodeCtx::decode`]:
datafusion_physical_expr_common::physical_expr::proto_decode::PhysicalExprDecodeCtx::decode
+ pub fn try_from_proto(
+ node: &datafusion_proto_models::protobuf::PhysicalExprNode,
+ ctx:
&datafusion_physical_expr_common::physical_expr::proto_decode::PhysicalExprDecodeCtx<'_>,
+ ) -> Result<Arc<dyn PhysicalExpr>> {
+ use datafusion_proto_models::protobuf;
+
+ let node = match &node.expr_type {
+ Some(protobuf::physical_expr_node::ExprType::IsNullExpr(node)) => {
+ node.as_ref()
+ }
+ _ => {
+ return datafusion_common::internal_err!(
+ "PhysicalExprNode is not an IsNullExpr"
+ );
+ }
+ };
+ let expr = node.expr.as_deref().ok_or_else(|| {
+ datafusion_common::DataFusionError::Internal(
+ "IsNullExpr is missing required field 'expr'".to_string(),
+ )
+ })?;
Review Comment:
Done, thanks! I switched this to use the new helpers.
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