What is the correct way to execute the query "select * from table where indexA >= 'a' order by indexB ASC limit 10" in indexedDB?

Question

What is the correct way to execute the query "select * from table where indexA >= 'a' order by indexB ASC limit 10" in indexedDB?

As I delve into learning about javascript IndexedDB, I have encountered a challenge in executing complex queries. My goal is to perform a select query like this one:

"select * from table where indexA >= 'a' order by indexB ASC limit 10"

I attempted to create an index using the code snippet below:

store.createIndex("indexA, indexB", ["indexA","indexB"])

and executed a request in this manner:

store.index("indexA, indexB").openCursor(IDBKeyRange.lowerBound([1, "a"], true))

yet, the outcome only sorted based on indexA. Is there another approach to achieve my desired result?

javascript indexeddb

Answer 1

Answer №1

In order to achieve the desired outcome, it is necessary for you to perform the roll operation yourself. There are essentially two main methods that can be employed:

One approach involves using an index on 'indexA', initiating a cursor with a lower bound of 'a', iterating through the data set, accumulating all relevant results, then sorting by indexB and selecting the top 10 entries.
Alternatively, you can utilize an index on 'indexB', open a cursor, iterate through the dataset while skipping any entries where indexA is less than 'a', and stop after encountering 10 eligible entries.

For more in-depth information on this topic, please refer to the linked resource (special thanks to another individual named Josh!).

Answer 2

In order to achieve the desired outcome, it is necessary for you to perform the roll operation yourself. There are essentially two main methods that can be employed:

One approach involves using an index on 'indexA', initiating a cursor with a lower bound of 'a', iterating through the data set, accumulating all relevant results, then sorting by indexB and selecting the top 10 entries.
Alternatively, you can utilize an index on 'indexB', open a cursor, iterate through the dataset while skipping any entries where indexA is less than 'a', and stop after encountering 10 eligible entries.

For more in-depth information on this topic, please refer to the linked resource (special thanks to another individual named Josh!).

What is the correct way to execute the query "select * from table where indexA >= 'a' order by indexB ASC limit 10" in indexedDB?

Answer №1

Similar questions

establishing the dimensions of table data cells

Highcharts-ng allows us to create charts without using the traditional syntax such as $('#container').high

Experiencing trouble with the integration of react native Vector icons in a current project

Comparing Two Items between Two Arrays

Using AngularJS to implement modules in a single controller

Steps for creating a new tab and refreshing the address bar with a different URL without having to reload the current page

Retrieving information from a dynamically generated HTML table using PHP

Having trouble with installing Angular JS on my computer

Facing a problem with the carousel in Angular 6

What is the best way to append a single class while also ensuring any previously added classes are removed?

Wavesurfer encounters difficulty generating waves due to a CROS Error caused by cookie settings

Unable to load page callback using NodeJS Express and Passport-facebook

Prevent a form from loading depending on the response received from an ajax callback

Retrieve the name of the path for the specified * stack within Express.js

Using an array of JSON objects to set up a Backbone.js bootstrap-initialized application

Developing a personalized logging service in NestJs: capturing logs without directly outputting them

Updating text color with Ajax response value

I am attempting to create a password validation system without the need for a database, using only a single

Ways to rearrange an object with javascript

obtaining information from newly added form elements in an Angular application