I am having a problem SELECTing all the rows in a small SQLite database,
using node.js version 0.10.24 and the 'sqlite3' module from Node
Packaged Modules (npmjs.org or 'npm'.) SQLite is version 3.8.2 compiled
on OS X 10.9.1. The npm "sqlite3" module is version 2.1.19:
-----------------------------------------------------------
npm info sqlite3
{ name: 'sqlite3',
description: 'Asynchronous, non-blocking SQLite3 bindings',
'dist-tags': { latest: '2.1.19' },
-----------------------------------------------------------------------------
Here is my script:
var sqlite3 = require('sqlite3').verbose()
var async = require('async')
var myList = []
var db = new sqlite3.Database('./test2.db')
async.series([
// Create a table and populate it
function (callback) {
db.run("CREATE TABLE lorem (listnumb bigint, info TEXT)",
function (err) {
if (err) return callback(err)
console.log('Table created. ')
callback()
});
},
function (callback) {
stmt = db.prepare("INSERT INTO lorem VALUES (?, ?);", function
(err) {
if (err) return callback(err)
for (var i = 0; i < 10; i++) {
stmt.run(i, "Ipsum " + i)
}
stmt.finalize();
console.log('Table populated. ')
callback()
})
},
function (callback) {
db.each("SELECT listnumb as numb, info FROM lorem;",
function (err, row) {
if (err) return callback(err)
console.log(' numb = ' + row.numb + ' info field = ' +
row.info)
},
function (err, cntx) {
if (err) return callback(err)
console.log('Number of retrieved rows is ' + cntx)
callback()
}
)
}
],
// This function gets called after the tasks above have completed
function(err) {
if (err) return new Error(err)
console.log("\n\nLength of array after the function go runs " +
myList.length)
db.close()
})
-------------------------------------------------------------------
The problem is that the db.each method shown above does not fetch all of
the rows that table lorem in database test2.db has been populated with.
I am running this script on OS X 10.9.1 in a terminal window. Here is
sample output:
$ node pacheco3.js
Table created.
Table populated.
numb = 0 info field = Ipsum 0
numb = 1 info field = Ipsum 1
numb = 2 info field = Ipsum 2
numb = 3 info field = Ipsum 3
numb = 4 info field = Ipsum 4
numb = 5 info field = Ipsum 5
Number of retrieved rows is 6
Length of array after the function go runs 0
---------------------------------------------------------------------------------------
There should be 10 rows. Here is the content of the table:
$ sqlite3 test2.db
SQLite version 3.8.2 2013-12-06 14:53:30
Enter ".help" for instructions
Enter SQL statements terminated with a ";"
sqlite> select listnumb as numb, info from lorem;
0|Ipsum 0
1|Ipsum 1
2|Ipsum 2
3|Ipsum 3
4|Ipsum 4
5|Ipsum 5
6|Ipsum 6
7|Ipsum 7
8|Ipsum 8
9|Ipsum 9
sqlite> .exit
Is there a flaw in my node.js script? Or should I be using a different
method of node-sqlite3 -- is there a method to be preferred over
db.each? The API documentation doesn't really speak to this.
Thanks
Bob Cochran
Greenbelt, Maryland, USA
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