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;
}
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.
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