javascript - Close MSSQL connection using mssql in node.js -


i trying write script in node.js query mssql database. new javascript, new node.js, new vscode, know few things sql. have working code, connection never seems close, , cannot values out of function.

so, have chunk of code, got example npm:

const sql = require('mssql'); var dbconfig = {     server:'theserver',     database:'thedb',     user:'un',     password:'pw',     port:1433 };  sql.connect(dbconfig).then(pool => {     // query          return pool.request()     .query('select top 10 * the_table') }).then(result => {     console.log(result); }).catch(err => {     // ... error checks })

this works, , can see 10 results logged in console. however, code never stops running. how connection close , stop?

i want results saved variable, changed code this:

const sql = require('mssql'); var dbconfig = {     server:'theserver',     database:'thedb',     user:'un',     password:'pw',     port:1433 };  let thelist; sql.connect(dbconfig).then(pool => {     // query          return pool.request()     .query('select top 10 * the_table') }).then(result => {     thelist= result; }).catch(err => {     // ... error checks })  console.log(thelist);

this returns 'undefined' console thelist, , again connection never seems cose, , script never shuts down.

how grab results of query , move on down road??

you should call

process.exit()

in end. source node docs

moreover 

sql.connect(dbconfig).then(pool => {     // query          return pool.request()     .query('select top 10 * the_table') }).then(result => {     thelist= result; }).catch(err => {     // ... error checks })

is async function 

console.log(thelist);

would not wait update value.

i think want do

sql.connect(dbconfig).then(pool => {     // query          return pool.request()     .query('select top 10 * the_table') }).then(result => {     thelist= result; }).catch(err => {     // ... error checks }).then(function(){   console.log(thelist);   process.exit(1); })

Comments

Post a Comment

Popular posts from this blog

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m...
Read more

python Tkinter Capturing keyboard events save as one single string -

is possible store keyboard events 1 string? code below stores 1 char , prints it. card reader or bar code reader, contains collection of character/ string not 1 character @ time. goal save char pressed text variable. from tkinter import * root = tk() def key(event): text= event.char text+= event.char print ("pressed", text) def callback(event): frame.focus_set() print ("clicked at", event.x, event.y) frame = frame(root, width=100, height=100) frame.bind("<key>", key) frame.bind("<button-1>", callback) frame.pack() root.mainloop() currently, creating text variable , everytime key() function gets called, , text stores last character typed. you can define text module level variable , , use module level text inside key function - text = '' def key(event): global text text+= event.char print("pressed", text)
Read more

sql server - Why does Linq-to-SQL add unnecessary COUNT()? -

here tables: create table customer ( cid int primary key, name varchar(32) ) create table ord ( oid int primary key, cid int foreign key references customer, address varchar(20) ) here's linq-to-sql statement: var aaa = c in db.customer select new { c, o = c.ord.tolist() }; and here's inexplicable query generated linq-to-sql: select [t0].[cid] [cid], [t0].[name] [name], [t1].[oid] [oid], [t1].[cid] [cid2], [t1].[address] [address], (select count(*) [dbo].[ord] [t2] [t2].[cid] = [t0].[cid]) [value] [dbo].[customer] [t0] left outer join [dbo].[ord] [t1] on [t1].[cid] = [t0].[cid] order [t0].[cid], [t1].[oid] i want understand how rid of count(*) part. it's entirely uncalled for! linq needs count(*) in order determine number of entries returned o = c.ord.tolist() .
Read more