核心参考网站：https://node-postgres.com/

1.pgsql-pool.js

const Pool = require('pg-pool');

const config = {
    user: 'postgres',
    password: 'XXXX',
    host: '121.5.xx.xx',
    port: 5432,
    database: 'postgres',
    // ssl: true,
    max: 20, // set pool max size to 20
    idleTimeoutMillis: 1000, // close idle clients after 1 second
    connectionTimeoutMillis: 1000, // return an error after 1 second if connection could not be established
    maxUses: 7500,
};

const pool = new Pool(config);
var async = require("async");
var datiConfig = require('./datiConfig');

function query(sql, options, callback) {
    if (datiConfig.debug) {
        console.log("sql:" + sql + " === " + options);
    }
    pool.connect(function (err, conn) {
        if (err) {
            callback(err, null, null);
        } else {
            conn.query(sql, options, function (err, results, fields) {
                console.error('err:::', err)
                // console.error('result:::',results)
                //释放连接
                conn.release();
                //事件驱动回调
                callback(err, results ? results.rows : null, fields);
            });
        }
    });
};

function getNewSqlParamEntity(sql, params, callback) {
    if (callback) {
        return callback(null, {
            sql: sql,
            params: params
        });
    }
    return {
        sql: sql,
        params: params
    };
}


function execTrans(sqlparamsEntities, callback) {
    pool.connect(function (err, connection) {
        //封装
        const shouldAbort = err => {
            if (err) {
                console.error('Error in transaction', err.stack)
                connection.query('ROLLBACK', err => {
                    if (err) {
                        console.error('Error rolling back client', err.stack)
                        // return callback(err, null);
                    }
                    // release the client back to the pool
                    connection.release()
                })
            }
            return err
        }
        connection.query('BEGIN', err => {
            if (shouldAbort(err) != null) callback(err, null);
            console.log("开始执行transaction，共执行" + sqlparamsEntities.length + "条数据");
            var funcAry = [];
            sqlparamsEntities.forEach(function (sql_param) {
                var temp = function (cb) {
                    var sql = sql_param.sql;
                    var param = sql_param.params;
                    connection.query(sql, param, function (tErr, rows, fields) {
                        if (tErr) {
                            if (shouldAbort(tErr) != null) {
                                console.log("事务失败，" + sql_param + "，ERROR：" + tErr);
                                throw tErr;
                            }
                        } else {
                            return cb(null, 'ok');
                        }
                    })
                };
                funcAry.push(temp);
            });

            async.series(funcAry, function (err, result) {
                console.log("transaction error: " + err);
                if (err) {
                    if (shouldAbort(err) != null) callback(err, null);
                } else {
                    connection.query('COMMIT', (err,info) => {
                        if (err) {
                            console.error('Error committing transaction', err.stack)
                            return callback(err, null);

                        } else {
                            return callback(null, info);

                        }
                        connection.release();
                    })
                }
            })
        });
    });
}

exports.query = query;
exports.getNewSqlParamEntity = getNewSqlParamEntity;
exports.execTrans = execTrans;

2.测试test.js

############query###########################################
var sql = "INSERT INTO sys_m_menus(name,icon,url,weight,parentId,i18n) VALUES ($1,$2,$3,$4,$5,$6)";
var options = [func.name, func.icon, func.url, func.weight, parentId, func.i18n];
db.query(sql, options, function (err, results, fields) {
    if (err) {
        console.log('error', err);
        if (err.code === 'ER_DUP_ENTRY') {
            apiUtil.responseResult(response, false, 301, "URL已存在", null);
        } else {
            apiUtil.responseResult(response, false, 301, "系统异常:" + err, null);
        }
    } else {
        var obj = new Object();
        obj.data = results;
        apiUtil.responseResult(response, true, 0, "", obj);//查询成功
    }
});
############事务###########################################
var sqlParamsEntity = [];
var sql1 = "delete from sys_m_org_menus where orgcode=?";
var param1 = [orgcode];
sqlParamsEntity.push(db.getNewSqlParamEntity(sql1, param1));
var sql2 = "delete from sys_m_org_menus_auth where orgcode=?";
var param2 = [orgcode];
sqlParamsEntity.push(db.getNewSqlParamEntity(sql2, param2));
db.execTrans(sqlParamsEntity, function (err, info) {
    if (err) {
        apiUtil.responseResult(response, false, 301, "系统异常:" + err, null);
    } else {
        apiUtil.responseResult(response, true, 0, "", null);
    }
});