Question

我需要在一个事务中执行3个不同的更新语句。我正在使用node-oracle包。是否有一个示例显示如何进行交易？

Answer 1

最初，您可以将autoCommit设置为false，一旦完成任务就可以提交它。

通过使用连接功能connection.commit(function(error))

示例：

var oracledb = require('oracledb');
oracledb.autoCommit = false;

并且成功执行connection.execute（）时，可以按以下方式提交它

conn.execute(
    "INSERT INTO test VALUES (:id, :nm)",
    [2, 'Alison'],  // Bind values
    function(err, result) {
      if (err) {
        return cb(err, conn);
      } else {
        console.log("Rows inserted: " + result.rowsAffected);  // 1
        conn.commit((error)=> { 
           console.log('Error : ', error);
        });
      }
    });

Answer 2

There are examples in the node-oracledb GitHub repo. You might prefer to look at the dev-4.0 branch which has been updated to use Node.js 8's async/await style, making it easier to understand and get correct (but don't forget to use await). Also read the manual.

The example you want is insert1.js which shows 3 statements forming a transaction. The first two statements don't commit but the last uses autoCommit (which saves the cost of an explicit commit()):

result = await connection.execute(
  `INSERT INTO test VALUES (:id, :nm)`,
  { id : {val: 1 }, nm : {val: 'Chris'} });

result = await connection.execute(
  `INSERT INTO test VALUES (:id, :nm)`,
  [2, 'Alison']);

result = await connection.execute(
  `UPDATE test SET name = :nm`,
  ['Bambi'],
  { autoCommit: true });  // commit once for all DML in the script

在node-oracledb中使用事务

2 个答案: