Postgresql Java Driver: [hot]

// Delete try (PreparedStatement pstmt = conn.prepareStatement("DELETE FROM users WHERE id = ?")) pstmt.setLong(1, 1); pstmt.executeUpdate();

String sql = "SELECT id, name FROM users WHERE email = ?"; try (PreparedStatement pstmt = conn.prepareStatement(sql)) pstmt.setString(1, "alice@example.com"); ResultSet rs = pstmt.executeQuery(); while (rs.next()) long id = rs.getLong("id"); String name = rs.getString("name");

try (Statement stmt = conn.createStatement()) stmt.execute("LISTEN my_channel"); // Wait for notifications while (true) PGNotification[] notifications = conn.unwrap(PGConnection.class).getNotifications(1000); if (notifications != null) for (PGNotification notification : notifications) System.out.println("Received: " + notification.getParameter()); postgresql java driver

When fetching millions of rows, avoid OutOfMemoryError by streaming.

jdbc:postgresql://host:port/database?parameter1=value1¶meter2=value2 // Delete try (PreparedStatement pstmt = conn

for (int i = 0; i < 10000; i++) pstmt.setString(1, "data" + i); pstmt.addBatch();

This article explores how to effectively use the official driver, covering setup, CRUD operations, connection pooling, and advanced features like LISTEN / NOTIFY and COPY . The PostgreSQL JDBC Driver (Group ID: org.postgresql , Artifact ID: postgresql ) is a Type 4 JDBC driver. This means it’s written purely in Java and connects directly to the database using the PostgreSQL wire protocol—no native libraries or ODBC bridges required. This means it’s written purely in Java and

// Update try (PreparedStatement pstmt = conn.prepareStatement("UPDATE users SET name = ? WHERE id = ?")) pstmt.setString(1, "Alice B."); pstmt.setLong(2, 1); pstmt.executeUpdate();