add test and remove dbg macro

polars/polars-lazy/src/physical_plan/executors/explode.rs

@@ -10,6 +10,6 @@ pub(crate) struct ExplodeExec {
 impl Executor for ExplodeExec {
     fn execute(&mut self, state: &ExecutionState) -> Result<DataFrame> {
         let df = self.input.execute(state)?;
-        dbg!(df.explode(&self.columns))
+        df.explode(&self.columns)
     }
 }

polars/tests/it/lazy/mod.rs

@@ -1,4 +1,5 @@
 mod explodes;
+mod projection_queries;
 mod window_expressions;
 
 use polars::prelude::*;

polars/tests/it/lazy/projection_queries.rs

@@ -0,0 +1,16 @@
+use polars::prelude::*;
+
+#[test]
+fn test_sum_after_filter() -> Result<()> {
+    let df = df![
+        "ids" => 0..10,
+        "values" => 10..20,
+    ]?
+    .lazy()
+    .filter(not(col("ids").eq(lit(5))))
+    .select([col("values").sum()])
+    .collect()?;
+
+    assert_eq!(df.column("values")?.get(0), AnyValue::Int32(130));
+    Ok(())
+}

polars/tests/it/main.rs

@@ -1,3 +1,5 @@
 mod io;
 mod joins;
 mod lazy;
+
+pub static FOODS_CSV: &str = "../examples/aggregate_multiple_files_in_chunks/datasets/foods1.csv";