Driver/Go: Implement suggestions by CodeRabbit

Author: amotl

docs/connect/go.md

@@ -17,33 +17,48 @@ Use pgx to connect to CrateDB from Go applications.
 :::{rubric} Synopsis
 :::
 
-```golang
+```go
 package main
 
 import (
-	"context"
-	"fmt"
-	"os"
-
-	"github.com/jackc/pgx/v5"
+  "context"
+  "fmt"
+  "os"
+  
+  "github.com/jackc/pgx/v5"
 )
 
 func main() {
-	// urlExample := "postgres://username:password@localhost:5432/schema_name"
-	conn, err := pgx.Connect(context.Background(), os.Getenv("DATABASE_URL"))
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "Unable to connect to database: %v\n", err)
-		os.Exit(1)
-	}
-	defer conn.Close(context.Background())
-
-	err = conn.QueryRow(context.Background(), "SELECT * FROM sys.summits ORDER BY height DESC LIMIT 3").Scan()
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "QueryRow failed: %v\n", err)
-		os.Exit(1)
-	}
-
-	fmt.Println(name, weight)
+
+  ctx := context.Background()
+  
+  // urlExample := "postgres://username:password@localhost:5432/schema_name"
+  conn, err := pgx.Connect(ctx, os.Getenv("DATABASE_URL"))
+  if err != nil {
+    fmt.Fprintf(os.Stderr, "Unable to connect to database: %v\n", err)
+    os.Exit(1)
+  }
+  defer conn.Close(ctx)
+  
+  err = conn.Query(ctx, "SELECT mountain, height FROM sys.summits ORDER BY height DESC LIMIT 3").Scan()
+  if err != nil {
+    fmt.Fprintf(os.Stderr, "Query failed: %v\n", err)
+    os.Exit(1)
+  }
+  
+  for rows.Next() {
+    var mountain string
+    var height int
+    if err := rows.Scan(&mountain, &height); err != nil {
+      fmt.Fprintf(os.Stderr, "Scan failed: %v\n", err)
+      os.Exit(1)
+    }
+    fmt.Println(name, height)
+  }
+  if err := rows.Err(); err != nil {
+    fmt.Fprintf(os.Stderr, "Rows error: %v\n", err)
+    os.Exit(1)
+  }
 }
 ```