Dandandan commented on a change in pull request #9639:
URL: https://github.com/apache/arrow/pull/9639#discussion_r588625713



##########
File path: rust/datafusion/src/execution/context.rs
##########
@@ -1702,6 +1702,23 @@ mod tests {
         }
         Ok(())
     }
+    #[test]
+    fn ctx_sql_should_optimize_plan() -> Result<()> {
+        let mut ctx = ExecutionContext::new();
+        let plan1 =
+            ctx.create_logical_plan("SELECT * FROM (SELECT 1) WHERE TRUE AND 
TRUE")?;
+
+        let opt_plan1 = ctx.optimize(&plan1)?;
+
+        let plan2 = ctx.sql("SELECT * FROM (SELECT 1) WHERE TRUE AND TRUE")?;

Review comment:
       Before the PR the test fails, as it doesn't optimize the plan.




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