fix(#2407): respect the HaltIfNull opcode when determining nullability

tests/sqlite/describe.rs

@@ -250,6 +250,22 @@ async fn it_describes_insert_with_returning() -> anyhow::Result<()> {
     Ok(())
 }
 
+#[sqlx_macros::test]
+async fn it_describes_bound_columns_non_null() -> anyhow::Result<()> {
+    let mut conn = new::<Sqlite>().await?;
+    let d = conn
+        .describe("INSERT INTO tweet (id, text) VALUES ($1, $2) returning *")
+        .await?;
+
+    assert_eq!(d.columns().len(), 4);
+    assert_eq!(d.column(0).type_info().name(), "INTEGER");
+    assert_eq!(d.nullable(0), Some(false));
+    assert_eq!(d.column(1).type_info().name(), "TEXT");
+    assert_eq!(d.nullable(1), Some(false));
+
+    Ok(())
+}
+
 #[sqlx_macros::test]
 async fn it_describes_update_with_returning() -> anyhow::Result<()> {
     let mut conn = new::<Sqlite>().await?;