diff --git a/docs/examples/rust/nativeexample/examples/schemaless_insert_json.rs b/docs/examples/rust/nativeexample/examples/schemaless_insert_json.rs
index 1a0e219462..d5aa45016e 100644
--- a/docs/examples/rust/nativeexample/examples/schemaless_insert_json.rs
+++ b/docs/examples/rust/nativeexample/examples/schemaless_insert_json.rs
@@ -24,6 +24,9 @@ async fn put_json() -> anyhow::Result<()> {
         .exec(format!("create database if not exists {db}"))
         .await?;
 
+    // should specify database before insert
+    client.exec(format!("use {db}")).await?;
+
     // SchemalessProtocol::Json
     let data = [
         r#"[{"metric": "meters.current", "timestamp": 1681345954000, "value": 10.3, "tags": {"location": "California.SanFrancisco", "groupid": 2}}, {"metric": "meters.voltage", "timestamp": 1648432611249, "value": 219, "tags": {"location": "California.LosAngeles", "groupid": 1}}, {"metric": "meters.current", "timestamp": 1648432611250, "value": 12.6, "tags": {"location": "California.SanFrancisco", "groupid": 2}}, {"metric": "meters.voltage", "timestamp": 1648432611250, "value": 221, "tags": {"location": "California.LosAngeles", "groupid": 1}}]"#
@@ -33,7 +36,6 @@ async fn put_json() -> anyhow::Result<()> {
 
     // demo with all fields
     let sml_data = SmlDataBuilder::default()
-        .db(db.to_string())
         .protocol(SchemalessProtocol::Json)
         .precision(SchemalessPrecision::Millisecond)
         .data(data.clone())
@@ -44,7 +46,6 @@ async fn put_json() -> anyhow::Result<()> {
 
     // demo with default precision
     let sml_data = SmlDataBuilder::default()
-        .db(db.to_string())
         .protocol(SchemalessProtocol::Json)
         .data(data.clone())
         .ttl(1000)
@@ -54,7 +55,6 @@ async fn put_json() -> anyhow::Result<()> {
 
     // demo with default ttl
     let sml_data = SmlDataBuilder::default()
-        .db(db.to_string())
         .protocol(SchemalessProtocol::Json)
         .data(data.clone())
         .req_id(302u64)
@@ -63,7 +63,6 @@ async fn put_json() -> anyhow::Result<()> {
 
     // demo with default req_id
     let sml_data = SmlDataBuilder::default()
-        .db(db.to_string())
         .protocol(SchemalessProtocol::Json)
         .data(data.clone())
         .build()?;
diff --git a/docs/examples/rust/nativeexample/examples/schemaless_insert_line.rs b/docs/examples/rust/nativeexample/examples/schemaless_insert_line.rs
index f4ffc78c54..3cf4d969ce 100644
--- a/docs/examples/rust/nativeexample/examples/schemaless_insert_line.rs
+++ b/docs/examples/rust/nativeexample/examples/schemaless_insert_line.rs
@@ -25,6 +25,9 @@ async fn put_line() -> anyhow::Result<()> {
         .exec(format!("create database if not exists {db}"))
         .await?;
 
+    // should specify database before insert
+    client.exec(format!("use {db}")).await?;
+
     let data = [
         "measurement,host=host1 field1=2i,field2=2.0 1577837300000",
         "measurement,host=host1 field1=2i,field2=2.0 1577837400000",
@@ -36,7 +39,6 @@ async fn put_line() -> anyhow::Result<()> {
 
     // demo with all fields
     let sml_data = SmlDataBuilder::default()
-        .db(db.to_string())
         .protocol(SchemalessProtocol::Line)
         .precision(SchemalessPrecision::Millisecond)
         .data(data.clone())
@@ -47,7 +49,6 @@ async fn put_line() -> anyhow::Result<()> {
 
     // demo with default ttl
     let sml_data = SmlDataBuilder::default()
-        .db(db.to_string())
         .protocol(SchemalessProtocol::Line)
         .precision(SchemalessPrecision::Millisecond)
         .data(data.clone())
@@ -57,7 +58,6 @@ async fn put_line() -> anyhow::Result<()> {
 
     // demo with default ttl and req_id 
     let sml_data = SmlDataBuilder::default()
-        .db(db.to_string())
         .protocol(SchemalessProtocol::Line)
         .precision(SchemalessPrecision::Millisecond)
         .data(data.clone())
@@ -66,7 +66,6 @@ async fn put_line() -> anyhow::Result<()> {
 
     // demo with default precision
     let sml_data = SmlDataBuilder::default()
-        .db(db.to_string())
         .protocol(SchemalessProtocol::Line)
         .data(data)
         .req_id(103u64)
diff --git a/docs/examples/rust/nativeexample/examples/schemaless_insert_telnet.rs b/docs/examples/rust/nativeexample/examples/schemaless_insert_telnet.rs
index 944216338e..d2bbc69261 100644
--- a/docs/examples/rust/nativeexample/examples/schemaless_insert_telnet.rs
+++ b/docs/examples/rust/nativeexample/examples/schemaless_insert_telnet.rs
@@ -24,6 +24,8 @@ async fn put_telnet() -> anyhow::Result<()> {
         .exec(format!("create database if not exists {db}"))
         .await?;
 
+    // should specify database before insert
+    client.exec(format!("use {db}")).await?;
 
     let data = [
         "meters.current 1648432611249 10.3 location=California.SanFrancisco group=2",
@@ -40,7 +42,6 @@ async fn put_telnet() -> anyhow::Result<()> {
 
     // demo with all fields
     let sml_data = SmlDataBuilder::default()
-        .db(db.to_string())
         .protocol(SchemalessProtocol::Telnet)
         .precision(SchemalessPrecision::Millisecond)
         .data(data.clone())
@@ -51,7 +52,6 @@ async fn put_telnet() -> anyhow::Result<()> {
 
     // demo with default precision
     let sml_data = SmlDataBuilder::default()
-        .db(db.to_string())
         .protocol(SchemalessProtocol::Telnet)
         .data(data.clone())
         .ttl(1000)
@@ -61,7 +61,6 @@ async fn put_telnet() -> anyhow::Result<()> {
 
     // demo with default ttl
     let sml_data = SmlDataBuilder::default()
-        .db(db.to_string())
         .protocol(SchemalessProtocol::Telnet)
         .data(data.clone())
         .req_id(202u64)
@@ -70,7 +69,6 @@ async fn put_telnet() -> anyhow::Result<()> {
 
     // demo with default req_id
     let sml_data = SmlDataBuilder::default()
-        .db(db.to_string())
         .protocol(SchemalessProtocol::Telnet)
         .data(data.clone())
         .build()?;