Add test

Author: jonahgao

datafusion/core/src/execution/context/mod.rs

@@ -1126,7 +1126,7 @@ impl SessionContext {
             .into_iter()
             .map(|e| match e {
                 Expr::Literal(scalar) => Ok(scalar),
-                _ => not_impl_err!("Unsupported data type for parameter: {}", e),
+                _ => not_impl_err!("Unsupported parameter type: {}", e),
             })
             .collect::<Result<_>>()?;
 

datafusion/sqllogictest/test_files/prepare.slt

@@ -136,6 +136,10 @@ EXECUTE my_plan6(20.0);
 statement error Cast error: Cannot cast string 'foo' to value of Int32 type
 EXECUTE my_plan6('foo');
 
+# TODO: support non-literal expressions
+statement error Unsupported parameter type
+EXECUTE my_plan6(10 + 20);
+
 statement ok
 PREPARE my_plan7(INT, STRING, DOUBLE, INT, DOUBLE, STRING)
     AS