Fix parallel iteration (#5250)

Co-authored-by: Tobie Morgan Hitchcock <[email protected]>

Author: rushmorem

crates/core/src/dbs/iterator.rs

@@ -739,7 +739,7 @@ impl Iterator {
 		// Count the result
 		self.count += 1;
 		// Periodically yield
-		if self.count % 100 == 0 {
+		if !stm.parallel() && self.count % 100 == 0 {
 			yield_now!();
 		}
 		// Process the result

crates/core/src/dbs/statement.rs

@@ -371,7 +371,6 @@ impl<'a> Statement<'a> {
 	}
 
 	/// Returns any PARALLEL clause if specified
-	#[cfg(not(target_arch = "wasm32"))]
 	pub(crate) fn parallel(&self) -> bool {
 		match self {
 			Statement::Select(v) => v.parallel,

crates/core/src/mac/mod.rs

@@ -272,14 +272,14 @@ mod test {
 		let Error::Unreachable(msg) = fail!("Reached unreachable code") else {
 			panic!()
 		};
-		assert_eq!("crates/core/src/mac/mod.rs:263: Reached unreachable code", msg);
+		assert_eq!("crates/core/src/mac/mod.rs:272: Reached unreachable code", msg);
 	}
 
 	#[test]
 	fn fail_arguments() {
 		let Error::Unreachable(msg) = fail!("Found {} but expected {}", "test", "other") else {
 			panic!()
 		};
-		assert_eq!("crates/core/src/mac/mod.rs:271: Found test but expected other", msg);
+		assert_eq!("crates/core/src/mac/mod.rs:280: Found test but expected other", msg);
 	}
 }