如何从JDBC截断Postgresql的表

我有一个Postgresql数据库,我想使用JDBC截断一些表.我怎么做？

这是我尝试过的,但没有一个工作……甚至没有报告任何错误：

使用CallableStatement.

try (Connection connection = getConnection();
     CallableStatement statement = connection.prepareCall("TRUNCATE " + tableName)) {
  return statement.execute();
}

使用Statement.

try (Connection connection = getConnection();
     Statement statement  = connection.createStatement()) {
  return statement.execute("TRUNCATE " + tableName);
}

使用PreparedStatement.

try (Connection connection = getConnection();
     PreparedStatement statement = connection.prepareStatement("TRUNCATE " + tableName)) {
  return statement.execute();
}

解决方法:

截断后,我需要提交：

try (Connection connection = getConnection();
     Statement statement = connection.createStatement()) {
  int result = statement.executeUpdate("TRUNCATE " + tableName);
  connection.commit();
  return result;
}

从the documentation开始：

TRUNCATE is transaction-safe with respect to the data in the tables: the truncation will be safely rolled back if the surrounding transaction does not commit.