diff --git a/push-down-test/config/with_push_down/tidb.toml b/push-down-test/config/with_push_down/tidb.toml
index 51587b0..de36222 100644
--- a/push-down-test/config/with_push_down/tidb.toml
+++ b/push-down-test/config/with_push_down/tidb.toml
@@ -5,3 +5,6 @@ socket = ""
 
 [status]
 report-status = false
+
+[performance]
+projection-push-down = true
diff --git a/push-down-test/prepare/1_proj.sql b/push-down-test/prepare/1_proj.sql
new file mode 100644
index 0000000..9c95fd7
--- /dev/null
+++ b/push-down-test/prepare/1_proj.sql
@@ -0,0 +1,2 @@
+CREATE TABLE proj_t0 (i int, t timestamp, s varchar(30));
+INSERT into proj_t0 VALUES (1, '2021-08-19 12:53:05', 'good good study, day day up');
diff --git a/push-down-test/sql/projection/1_basic_1.sql b/push-down-test/sql/projection/1_basic_1.sql
new file mode 100644
index 0000000..598fab0
--- /dev/null
+++ b/push-down-test/sql/projection/1_basic_1.sql
@@ -0,0 +1,3 @@
+SELECT i + 1 FROM proj_t0;
+SELECT DATE_FORMAT(t, '%Y-%m-%d %H') FROM proj_t0;
+SELECT MD5(s) FROM proj_t0;
diff --git a/push-down-test/src/main.go b/push-down-test/src/main.go
index e328efc..2ebce05 100644
--- a/push-down-test/src/main.go
+++ b/push-down-test/src/main.go
@@ -148,6 +148,8 @@ func runTestCase(testCasePath string) bool {
 
 func runStatements(logChan chan *statementLog, connString string, statements []string) {
 	db := mustDBOpen(connString, *dbName)
+	v := getSessionVariable(db, "tidb_opt_projection_push_down")
+	log.Printf("for %s tidb_opt_projection_push_down=%s\n", connString, v)
 	connID := getConnectionID(db)
 	for i, stmt := range statements {
 		runSingleStatement(stmt, i, db, connID, logChan)
@@ -163,6 +165,13 @@ func getConnectionID(db *sql.DB) uint64 {
 	return v
 }
 
+func getSessionVariable(db *sql.DB, varname string) string {
+	var v string
+	err := db.QueryRow(fmt.Sprintf("select @@%s;", varname)).Scan(&v)
+	expectNoErr(err)
+	return v
+}
+
 func runQuery(db *sql.DB, sql string) (string, error) {
 	rows, err := db.Query(sql)
 	buf := new(bytes.Buffer)