diff --git a/examples/postgres/db/testdata.sql b/examples/postgres/db/testdata.sql
index 6e21a5a..809afec 100644
--- a/examples/postgres/db/testdata.sql
+++ b/examples/postgres/db/testdata.sql
@@ -3,17 +3,23 @@ CREATE TABLE articletest (
    title varchar(40) NOT NULL,
    content text NOT NULL,
    authorname varchar(40) NOT NULL,
-   coauthor text
+   coauthor text,
+   authorage real,
+   authorheight double precision
 );
 
-INSERT INTO articletest (title, content, authorname) VALUES
+INSERT INTO articletest (title, content, authorname, authorage, authorheight) VALUES
 (
    'My Life as a Goat',
    'I went to Nepal to live as a goat, and it was much better than being a butler.',
-   'E. Blackadder'
+   'E. Blackadder',
+   '22.1',
+   '72.23'
 ),
 (
    'Magnificent Octopus',
    'Once upon a time there was a lovely little sausage.',
-   'S. Baldrick'
+   'S. Baldrick',
+   '11.2',
+   '50.48'
 );
diff --git a/examples/postgres/src/lib.rs b/examples/postgres/src/lib.rs
index 94c4f6f..6eb6a40 100644
--- a/examples/postgres/src/lib.rs
+++ b/examples/postgres/src/lib.rs
@@ -17,6 +17,8 @@ struct Article {
     content: String,
     authorname: String,
     coauthor: Option<String>,
+    authorage: Option<f32>,
+    authorheight: Option<f64>,
 }
 
 impl TryFrom<&pg::Row> for Article {
@@ -28,6 +30,8 @@ impl TryFrom<&pg::Row> for Article {
         let content = String::decode(&row[2])?;
         let authorname = String::decode(&row[3])?;
         let coauthor = Option::<String>::decode(&row[4])?;
+        let authorage = Option::<f32>::decode(&row[5])?;
+        let authorheight = Option::<f64>::decode(&row[6])?;
 
         Ok(Self {
             id,
@@ -35,6 +39,8 @@ impl TryFrom<&pg::Row> for Article {
             content,
             authorname,
             coauthor,
+            authorage,
+            authorheight,
         })
     }
 }
@@ -55,7 +61,8 @@ fn read(_req: Request<()>) -> Result<Response<String>> {
     let address = std::env::var(DB_URL_ENV)?;
     let conn = pg::Connection::open(&address)?;
 
-    let sql = "SELECT id, title, content, authorname, coauthor FROM articletest";
+    let sql =
+        "SELECT id, title, content, authorname, coauthor, authorage, authorheight FROM articletest";
     let rowset = conn.query(sql, &[])?;
 
     let column_summary = rowset
@@ -90,7 +97,7 @@ fn write(_req: Request<()>) -> Result<Response<String>> {
     let address = std::env::var(DB_URL_ENV)?;
     let conn = pg::Connection::open(&address)?;
 
-    let sql = "INSERT INTO articletest (title, content, authorname) VALUES ('aaa', 'bbb', 'ccc')";
+    let sql = "INSERT INTO articletest (title, content, authorname, authorage, authorheight) VALUES ('aaa', 'bbb', 'ccc', 1.1, 2.22)";
     let nrow_executed = conn.execute(sql, &[])?;
 
     println!("nrow_executed: {}", nrow_executed);