Using Node.js with Caché - InterSystems Documentation

open()
4.13 open()
The open() method opens the specified Caché database. See “Opening and Closing the Caché Database” for a detailed
description of how to open and close the database.
Synchronous
Asynchronous
Parameters
mydata.open(parameters);
mydata.open(parameters, callback_function);
• parameters — specifies the Caché database to be opened:
– parameters.path — Path to the ‘mgr’ directory of the target Caché installation.
– parameters.username — User name for access.
– parameters.password — Password for access.
– parameters.namespace — Target Caché namespace.
• callback_function — a function of the form function(error, result){} used to return results
asynchronously (see “Synchronous vs. Asynchronous cache.node Methods”).
Example
mydata.open(
{
path:"/cache20102/mgr",
username: "_SYSTEM",
password: "SYS",
namespace: "USER"
},
function(error, result) { // callback code }
);
Result:
Operation successful if no error reported.
4.14 previous()
The previous() method gets the previous Global subscript
Get the previous value in the collating sequence for a particular level of subscript.
Synchronous
var result = mydata.previous(node);
Asynchronous
mydata.previous(node, callback_function);
Using Node.js with Caché 27