Yes, would say so. `context.DB` is ``` D1Database { binding: Fetcher } ``` So that would seem oka

Yes, would say so.

context.DB

context.DB

D1Database {
  binding: Fetcher
}

D1Database {
  binding: Fetcher
}

So that would seem okay to me as well.

jpony•5/21/23, 12:54 PM

@elithrar Ah ok I understand now, I need to set it up all locally to make it work.

jpony•5/21/23, 12:54 PM

Hopefully in the future we can configure D1 like you can with worker key values from the web interface! (but I understand doing it this way during the alpha, since it seems like you automatically add a bunch of code to the worker script to make it work properly)

SSly Yes, would say so. `context.DB` is ``` D1Database { binding: Fetcher } ``` So...

Matt Silverlock•5/21/23, 12:57 PM

Is this being run locally?

MMatt Silverlock Is this being run locally?

SlyOP•5/21/23, 1:00 PM

Stupid me... example is on Wrangler 2.15, I used 3. Will revert back to 2.15 as used in the sample. Therefor yes...

jpony•5/21/23, 1:47 PM

So I was able to bind my DB to my worker script. Is there a good page with example queries? Basically I want to run this from my worker script: SELECT * FROM DB_BIND WHERE name LIKE %city% LIMIT 10; then output the results in json, or false if it doesn't find anything.

jpony•5/21/23, 1:48 PM

Sadly chat GPT doesn't understand D1 yet

jpony•5/21/23, 1:59 PM

I tried this but it doesn't work:

try {
const result = await CITIES_ALL.prepare(


        select * from cities_all where name like ? limit 10


        select * from cities_all where name like ? limit 10

).bind('%' + sanitizedCity + '%').all()

return new Response(JSON.stringify(result), {
status: 200,
headers: {...headers, 'Content-Type': 'application/json'}
});
} catch (error) {
return new Response(JSON.stringify({ error: 'Error' }), {
status: 500,
headers: {...headers, 'Content-Type': 'application/json'}
});
}

jpony•5/21/23, 2:46 PM

The error I get is "ReferenceError: CITIES_ALL is not defined", so I perhaps I am not initializing it properly? I got this message when I published it, so I think I must be part of the the way there: Your worker has access to the following bindings:

D1 Databases:
- CITIES_ALL: cities_all xxxx

Jjpony The error I get is "ReferenceError: CITIES_ALL is not defined", so I perhaps I a...

DaniFoldi•5/21/23, 2:51 PM

you're trying to access it as

CITIES_ALL

CITIES_ALL

, which is the syntax for service workers - the new module worker syntax makes bindings available under

env

env

that you get in the handler, so you should be using

env.CITIES_ALL

env.CITIES_ALL

jpony•5/21/23, 2:51 PM

I tried env.CITIES_ALL as well, and it got the same error:

'ReferenceError: env is not defined'

DaniFoldi•5/21/23, 2:52 PM

can you show your worker code?

Original message was deleted

DaniFoldi•5/21/23, 2:57 PM

you're using service worker syntax, which doesn't work with D1 - here's how to migrate: https://developers.cloudflare.com/workers/learning/migrating-to-module-workers/#migrating-to-module-workers

Migrating to module Workers · Cloudflare Workers docs

This guide will show you how to migrate your Workers from the Service Worker syntax to the new Module Worker format.

jpony•5/21/23, 2:57 PM

Ah, ok thanks for that. I'll take a look!

jpony•5/21/23, 3:11 PM

Hmmm, maybe I am misunderstanding something and the database is only available locally?

jpony•5/21/23, 3:12 PM

I probably should wait until D1 is out of alpha anyway before I continue tinkering with it. Thank you for your help!

bajosi•5/21/23, 5:28 PM

how do i bind d1 to a worker, i need a basic backend and db for my school project :p

PPaganMuffin Question about pricing if I understand it correctly. I have table with 1000 en...

Matt Silverlock•5/21/23, 10:08 PM

Ordering requires a larger read, unless your index is ordered.

PPaganMuffin Question about pricing if I understand it correctly. I have table with 1000 en...

Matt Silverlock•5/21/23, 10:10 PM

You’d likely want a multi-column index - on both (id, created_at) - https://developers.cloudflare.com/d1/learning/using-indexes/#multi-column-indexes

Use indexes · Cloudflare D1 docs

Indexes enable D1 to improve query performance over the indexed columns for common (popular) queries by reducing the amount of data (number of rows) …

PPaganMuffin Question about pricing if I understand it correctly. I have table with 1000 en...

Matt Silverlock•5/21/23, 10:11 PM

https://use-the-index-luke.com/sql/sorting-grouping/order-by-asc-desc-nulls-last is a good read. LIMIT is only limits what is returned. Not read.

ASC and DESC modifiers might affect query performance

Indexes that optimize ORDER BY must consider the ASC/DESC and NULLS FIRST/LAST modifiers.

justaname•5/21/23, 10:40 PM

is there going to be a way to move a database from like planetscale to d1? And move from d1 to something else if d1 for some reason doesnt suite my needs anymore. Just wanna make sure of no vendor lock

Vvaltyr Hey I'm having some issues with my migrations. For some reason D1 errors out whe...

Matt Silverlock•5/21/23, 11:11 PM

Regression. Tracking internally. Will aim to fix this week.

Jjustaname is there going to be a way to move a database from like planetscale to d1? And m...

Matt Silverlock•5/21/23, 11:12 PM

Migrating between databases - PlanetScale is MySQL based and D1 is SQLite based - is not always trivial. Query languages aren’t the same, nor are types. For simple use-cases it can be easy.

LLiudmila D1 dashboard displays BLOBs as long integers, is that expected? Can we have them...

Matt Silverlock•5/21/23, 11:13 PM

Downloadable as? A BLOB is binary data - at best we can give you an

octet-stream

octet-stream

but you’d need to determine what the data actually is/what application can handle it.

matt•5/22/23, 12:57 AM

i currently have a use case where I need to interact with ~20 DO's concurrently, and I think I'm getting some poor performance due to the maximum of 6 concurrent connections. Might migrating to D1 solve this issue?

Mmatt i currently have a use case where I need to interact with ~20 DO's concurrently,...

Isaac McFadyen•5/22/23, 1:01 AM

It depends. D1 doesn't lift the limit of 6 concurrent connections, but if you can move all of the work on the ~20 DOs to a single D1 DB then that might work for you. It entirely depends on what your data/schema looks like though - some data isn't a great fit for SQL.

IIsaac McFadyen It depends. D1 doesn't lift the limit of 6 concurrent connections, but if you ca...

matt•5/22/23, 1:22 AM

Thanks Isaac, I need to map an input string to a UUID globally with strong consistency. Once that mapping is created, it's placed in KV and read from there until the end of time, i.e. that input string no longer will pass through DO

However I need to do this mapping in chunks of 20-50 with strong consistency, not sure what type of solution I am looking for here

Mmatt Thanks Isaac, I need to map an input string to a UUID globally with strong consi...

Isaac McFadyen•5/22/23, 1:28 AM

D1 is strongly consistent as it stands right now. However when replicas are made available sometime in the future those replicas will likely be eventually consistent.

Isaac McFadyen•5/22/23, 1:29 AM

I'm not sure whether there will be an option to force a read from the primary - I would hope so but I don't know for sure.

Ggrey15 @geelen when D1 is out of beta, will there still be cold-starts? atm, happening ...

Isaac McFadyen•5/22/23, 1:47 AM

Are you using the new backend or the old backend?

Isaac McFadyen•5/22/23, 1:47 AM

(if you don't know or created your DB before 3 days ago you are using the old backend)

Isaac McFadyen•5/22/23, 2:30 AM

Interesting. I'm not sure whether that's expected - someone else here would need to confirm.

Yes, would say so. `context.DB` is ``` D1Database { binding: Fetcher } ``` So that would seem oka

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