alamb commented on code in PR #13527:
URL: https://github.com/apache/datafusion/pull/13527#discussion_r1899131349
##########
datafusion-examples/examples/composed_extension_codec.rs:
##########
@@ -71,8 +71,10 @@ async fn main() {
// deserialize proto back to execution plan
let runtime = ctx.runtime_env();
+ let state = ctx.state();
+ let config_options = state.config_options();
let result_exec_plan: Arc<dyn ExecutionPlan> = proto
- .try_into_physical_plan(&ctx, runtime.deref(), &composed_codec)
+ .try_into_physical_plan(&ctx, config_options, runtime.deref(),
&composed_codec)
Review Comment:
This is an API change, but I think it is required to thread the config
options through as each argument is specific
We could potentially improve the `try_into_physical_plan` API (as a follow
on PR) to make it easier to update the API in the future using a trait or
something like
https://github.com/apache/datafusion/blob/e99e02b9b9093ceb0c13a2dd32a2a89beba47930/datafusion/expr/src/expr_schema.rs#L39-L38
So this would look something like
```rust
pub trait ProtobufContext {
/// return a function registry
fn function_registry(&self) -> &dyn FunctionRegistry;
/// return the runtime env
fn runtime_env(&self) -> &RuntimeEnv;
/// return the config options
fn config_options(&self) -> &ConfigOptions;
/// return extension codec
fn extension_codec(&self) -> &dyn PhysicalExtensionCodec;
}
```
```rust
impl AsExecutionPlan for protobuf::PhysicalPlanNode {
...
fn try_into_physical_plan(
&self,
registry: &dyn FunctionRegistry,
config_options: &ConfigOptions,
runtime: &RuntimeEnv,
extension_codec: &dyn PhysicalExtensionCodec,
) -> Result<Arc<dyn ExecutionPlan>> {
##########
datafusion-examples/examples/pruning.rs:
##########
@@ -187,7 +188,9 @@ impl PruningStatistics for MyCatalog {
fn create_pruning_predicate(expr: Expr, schema: &SchemaRef) ->
PruningPredicate {
let df_schema = DFSchema::try_from(schema.as_ref().clone()).unwrap();
let props = ExecutionProps::new();
- let physical_expr = create_physical_expr(&expr, &df_schema,
&props).unwrap();
+ let config_options = ConfigOptions::default();
Review Comment:
Something we could potentially do to make this API slightly easier to use
might be to create a static default `ConfigOptions`
Something like
```rust
impl ConfigOptions {
/// returns a reference to default ConfigOptions
pub fn default_singleton() -> &'static ConfigOptions
}
```
This would then make it easier to return `&ConfigOptions` in various places
when only the default was needed
For example, then in `LocalCsvTableFunc` you could avoid having to thread
the `ConfigOptions` through as in that example having the actual config options
isn't important
##########
datafusion/physical-expr/src/scalar_function.rs:
##########
@@ -243,6 +292,7 @@ pub fn create_physical_expr(
Arc::new(fun.clone()),
input_phy_exprs.to_vec(),
return_type,
+ Arc::new(config_options.clone()),
Review Comment:
This line worries me -- it means each distinct scalar function in the plan
will get an entirely new copy of the ConfigOptions.
I think the `Arc` should be passed in as the argument like this (I realize
this will be a significant code change) so that the config options are copied
at most once per plan
```rust
/// Create a physical expression for the UDF.
pub fn create_physical_expr(
fun: &ScalarUDF,
input_phy_exprs: &[Arc<dyn PhysicalExpr>],
input_schema: &Schema,
args: &[Expr],
input_dfschema: &DFSchema,
config_options: &Arc<ConfigOptions>, // <--- I think this should be an
`Arc`
) -> Result<Arc<dyn PhysicalExpr>> {
```
I think that would also make it clearer that physical planning makes a read
only copy of the configuration (`Arc<ConfigOptions>`) that is then unchanged
during execution
##########
datafusion/core/src/datasource/listing/helpers.rs:
##########
@@ -241,6 +241,7 @@ async fn prune_partitions(
partitions: Vec<Partition>,
filters: &[Expr],
partition_cols: &[(String, DataType)],
+ ctx: &SessionState,
Review Comment:
I recommend passing `&ConfigOptions` directly here as the function only
needs the config, not the entire session state
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