Address EXECUTE missing name review

Author: Dandandan

datafusion/sql/src/statement.rs

@@ -886,16 +886,16 @@ impl<S: ContextProvider> SqlToRel<'_, S> {
                         "Execute statement with DEFAULT is not supported"
                     );
                 }
+                let name = name.ok_or_else(|| {
+                    plan_datafusion_err!("EXECUTE statement requires a name")
+                })?;
+
                 let empty_schema = DFSchema::empty();
                 let parameters = parameters
                     .into_iter()
                     .map(|expr| self.sql_to_expr(expr, &empty_schema, planner_context))
                     .collect::<Result<Vec<Expr>>>()?;
 
-                let name = name.ok_or_else(|| {
-                    plan_datafusion_err!("EXECUTE statement requires a name")
-                })?;
-
                 Ok(LogicalPlan::Statement(PlanStatement::Execute(Execute {
                     name: object_name_to_string(&name),
                     parameters,

datafusion/sqllogictest/test_files/prepare.slt

@@ -63,6 +63,9 @@ EXEC('');
 statement error EXECUTE statement requires a name
 EXEC('any-string');
 
+statement error EXECUTE statement requires a name
+EXEC(unknown_column);
+
 statement error EXECUTE statement requires a name
 EXECUTE();