Ted-Jiang commented on code in PR #2130:
URL: https://github.com/apache/arrow-datafusion/pull/2130#discussion_r844106903
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ballista/rust/core/src/serde/physical_plan/from_proto.rs:
##########
@@ -54,125 +56,174 @@ impl From<&protobuf::PhysicalColumn> for Column {
}
}
-impl TryFrom<&protobuf::PhysicalExprNode> for Arc<dyn PhysicalExpr> {
- type Error = BallistaError;
+pub(crate) fn parse_physical_expr(
+ proto: &protobuf::PhysicalExprNode,
+ registry: &dyn FunctionRegistry,
+) -> Result<Arc<dyn PhysicalExpr>, BallistaError> {
+ let expr_type = proto
+ .expr_type
+ .as_ref()
+ .ok_or_else(|| proto_error("Unexpected empty physical expression"))?;
+
+ let pexpr: Arc<dyn PhysicalExpr> = match expr_type {
+ ExprType::Column(c) => {
+ let pcol: Column = c.into();
+ Arc::new(pcol)
+ }
+ ExprType::Literal(scalar) => {
+ Arc::new(Literal::new(convert_required!(scalar.value)?))
+ }
+ ExprType::BinaryExpr(binary_expr) => Arc::new(BinaryExpr::new(
+ parse_required_physical_box_expr(&binary_expr.l, registry,
"left")?,
+ from_proto_binary_op(&binary_expr.op)?,
+ parse_required_physical_box_expr(&binary_expr.r, registry,
"right")?,
+ )),
+ ExprType::AggregateExpr(_) => {
+ return Err(BallistaError::General(
+ "Cannot convert aggregate expr node to physical
expression".to_owned(),
+ ));
+ }
+ ExprType::WindowExpr(_) => {
+ return Err(BallistaError::General(
+ "Cannot convert window expr node to physical
expression".to_owned(),
+ ));
+ }
+ ExprType::Sort(_) => {
+ return Err(BallistaError::General(
+ "Cannot convert sort expr node to physical
expression".to_owned(),
+ ));
+ }
+ ExprType::IsNullExpr(e) => Arc::new(IsNullExpr::new(
+ parse_required_physical_box_expr(&e.expr, registry, "expr")?,
+ )),
+ ExprType::IsNotNullExpr(e) => Arc::new(IsNotNullExpr::new(
+ parse_required_physical_box_expr(&e.expr, registry, "expr")?,
+ )),
+ ExprType::NotExpr(e) =>
Arc::new(NotExpr::new(parse_required_physical_box_expr(
+ &e.expr, registry, "expr",
+ )?)),
+ ExprType::Negative(e) => Arc::new(NegativeExpr::new(
+ parse_required_physical_box_expr(&e.expr, registry, "expr")?,
+ )),
+ ExprType::InList(e) => Arc::new(InListExpr::new(
+ parse_required_physical_box_expr(&e.expr, registry, "expr")?,
+ e.list
+ .iter()
+ .map(|x| parse_physical_expr(x, registry))
+ .collect::<Result<Vec<_>, _>>()?,
+ e.negated,
+ )),
+ ExprType::Case(e) => Arc::new(CaseExpr::try_new(
+ e.expr
+ .as_ref()
+ .map(|e| parse_physical_expr(e.as_ref(), registry))
+ .transpose()?,
+ e.when_then_expr
+ .iter()
+ .map(|e| {
+ Ok((
+ parse_required_physical_expr(
+ &e.when_expr,
+ registry,
+ "when_expr",
+ )?,
+ parse_required_physical_expr(
+ &e.then_expr,
+ registry,
+ "then_expr",
+ )?,
+ ))
+ })
+ .collect::<Result<Vec<_>, BallistaError>>()?
+ .as_slice(),
+ e.else_expr
+ .as_ref()
+ .map(|e| parse_physical_expr(e.as_ref(), registry))
+ .transpose()?,
+ )?),
+ ExprType::Cast(e) => Arc::new(CastExpr::new(
+ parse_required_physical_box_expr(&e.expr, registry, "expr")?,
+ convert_required!(e.arrow_type)?,
+ DEFAULT_DATAFUSION_CAST_OPTIONS,
+ )),
+ ExprType::TryCast(e) => Arc::new(TryCastExpr::new(
+ parse_required_physical_box_expr(&e.expr, registry, "expr")?,
+ convert_required!(e.arrow_type)?,
+ )),
+ ExprType::ScalarFunction(e) => {
+ let scalar_function =
datafusion_proto::protobuf::ScalarFunction::from_i32(
+ e.fun,
+ )
+ .ok_or_else(|| {
+ proto_error(format!("Received an unknown scalar function: {}",
e.fun,))
+ })?;
+
+ let args = e
+ .args
+ .iter()
+ .map(|x| parse_physical_expr(x, registry))
+ .collect::<Result<Vec<_>, _>>()?;
+
+ // TODO Do not create new the ExecutionProps
+ let execution_props = ExecutionProps::new();
+
+ let fun_expr = functions::create_physical_fun(
+ &(&scalar_function).into(),
+ &execution_props,
+ )?;
+
+ Arc::new(ScalarFunctionExpr::new(
+ &e.name,
+ fun_expr,
+ args,
+ &convert_required!(e.return_type)?,
+ ))
+ }
+ ExprType::ScalarUdf(e) => {
+ let scalar_fun =
registry.udf(e.name.as_str())?.deref().clone().fun;
Review Comment:
👍
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