enhancer-data-bridge/esql-compiler/procedure-template-transaction.js

A bridge between Enhancer Clould and user business datasource

module.exports = `'use strict';
var logger = require('log4js').getLogger('io');

var escape = require('mysql').escape;
var escapeId = require('mysql').escapeId;

(function (connectionName, parameters, serverVariables, Enhancer, done) {
  var async = require('async');
  var transaction = [];
  var $0, $1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21, $22, $23, $24, $25, $26, $27, $28, $29;
  var databaseService = Enhancer.getDatabaseService();

  databaseService.beginTransaction(connectionName, function(err, conn) {
    if (err) {
      err.message = 'Can not get connection from database. Reason: ' + err.message;
      return done(err);
    }
    var databaseConnection = conn;

    {{TRANSACTION-BLOCKS}}
    
    async.series(transaction, function(err, results) {
      if (err) {
        return conn.rollback(function(rberr) {
          conn.release();
          done(err || rberr);
        });
      }
      results = results.map(function(r, index) {
        if (r.rows && r.rows.length > 3000) {
          logger.warn('第 ' + index + ' 条 SQL 执行结果超过 3000 条，实际条数：' + r.rows.length + '。返回给前端的结果中只会包含前 3000 条数据。');
          r.rows = r.rows.slice(0, 3000);
        }
        return r;
      });

      conn.commit(function(err, result) {
        if (err) {
          return conn.rollback(function(rberr) {
            conn.release();
            done(err || rberr);
          });
        }
        conn.release();
        done(null, {
          success: true,
          results: results
        });
      });
    });
  });
});`