enlarge stack

Signed-off-by: Ruihang Xia <waynestxia@gmail.com>

Author: waynexia

Cargo.lock

@@ -177,6 +177,7 @@ insta = { workspace = true }
 paste = { workspace = true }
 rand = { workspace = true, features = ["small_rng"] }
 rand_distr = "0.5"
+recursive = { workspace = true }
 regex = { workspace = true }
 rstest = { workspace = true }
 serde_json = { workspace = true }

datafusion/core/Cargo.toml

@@ -47,6 +47,7 @@ use datafusion_physical_plan::ExecutionPlanProperties;
 use datafusion_sql::unparser::Unparser;
 use datafusion_sql::unparser::dialect::DefaultDialect;
 use itertools::Itertools;
+use recursive::{set_minimum_stack_size, set_stack_allocation_size};
 
 /// Paths to benchmark query files (supports running from repo root or different working directories).
 const BENCHMARK_PATHS: &[&str] = &["../../benchmarks/", "./benchmarks/"];
@@ -458,5 +459,8 @@ async fn test_clickbench_unparser_roundtrip() {
 
 #[tokio::test]
 async fn test_tpch_unparser_roundtrip() {
+    // Grow stacker segments earlier to avoid deep unparser recursion overflow in q20.
+    set_minimum_stack_size(512 * 1024);
+    set_stack_allocation_size(8 * 1024 * 1024);
     run_roundtrip_tests("TPC-H", tpch_queries(), tpch_test_context).await;
 }