If I already created a D1 database on the dashboard, how can I interact with it during local develop
If I already created a D1 database on the dashboard, how can I interact with it during local development?
Smy wrangler.toml is this:
although when doing wrangler pages dev, it's undefined
although when doing wrangler pages dev, it's undefined
Shonestly I'm just completely lost 
SOk I've figured out what I need to do now, but it does feel janky.
SI have my binding working in Qwik, once the site is uploaded to Cloudflare Pages.
However, locally, the only way I can see testing with the "same" D1 db that's on cloudflare is by making a
However, locally, the only way I can see testing with the "same" D1 db that's on cloudflare is by making a
bootstrap.sql / db-setup.sql similar to the one in the tutorial, executing that with fake data, and going on from there.
MSomething the Pages team is working on improving. In the meantime (and this is not officially supported; could break/change in the future):
- Create a
wrangler.tomlwith apreview_database_idkey that maps to the same name used for--d1=<BINDING>you pass towrangler pages dev- e.g. "DB" or "PROD_DB" (as appropriate)
- Execute
wrangler d1commands with the--localflag against that local database to seed it / run migrations / etc - e.g.wrangler d1 execute db-name --file=seed.sql --local - Ensure that you pass
--d1=BINDING_NAMEto anywrangler pages devcommands so that Pages references the same local DB.
MYour
wrangler.toml doesn't need anything more than just a [[d1_database]] definition: e.g. https://github.com/elithrar/remix-plus-d1/blob/main/wrangler.toml#L1-L5
KMy feedback
So some is needed
Would be nicer.
So some is needed
--local some is not. My expectation is all should default to --local and --remote when needed.Would be nicer.
MRemote is always the default for any non-local-dev (wrangler dev, wrangler pages dev) commands. You’re creating databases: you don’t want to think you’ve created one and find out on deploy it doesn’t exist.
SHi team, does D1 support using sqlite extensions? For example, if I want to use full text search capability there is a built in Fts5 extension: https://www.sqlite.org/fts5.html, can I use this in D1 without additional configuration?
SAnd second question, is js transactions coming anytime this year or is that a much longer term feature? ( read a value from d1, use that read value to do some calculation then write the result back, all inside a transaction)
SThanks for your response :) Yep! This is basically what I have right now and it works great!
I suppose once DB backups are available to download, it would be nice to download that to use for local development. Making a seed in the meantime is nice anyways because it declares the database structure for reference
I suppose once DB backups are available to download, it would be nice to download that to use for local development. Making a seed in the meantime is nice anyways because it declares the database structure for reference
MFTS5 is built in. On our list to include in our documentation, but works exactly as the SQLite docs say. We also support JSON5 - https://developers.cloudflare.com/d1/learning/querying-json/
D1 has built-in support for querying and parsing JSON data stored within a database. This enables you to:
MI keep randomly encountering this error while using
wrangler d1 execute: (some details redacted)Mit's also weird bc about half the time I see the error, the query went through successfully
MAre you using the new experimental backend? You can (should) log
error.cause.message as well - https://developers.cloudflare.com/d1/platform/client-api/#errorsAs part of our Client API, both static and prepared statements are supported. Best practice is to use prepared statements which are precompiled …
Myes that's correct - it was produced by wrangler
Mand yes, I am using the experimental backend. I was trying to do an
INSERT operation with fewer than 20 rows, so I can't imagine it was failing due to any kind of size limit
MWithout more details it’s hard to debug. Is the data static? Not all rows are created equal.
MI’d take a look through https://developers.cloudflare.com/d1/platform/limits/ to make sure you aren’t hitting limits. We have some changes queued up that will better expose error messages.
Many of these limits will increase during D1’s public alpha. Join the #d1-open-alpha channel in the Cloudflare Developer Discord to keep up to date …
MI seem to be getting a lot of
Error: D1_ERROR: Error: Network connection lost. errors with fairly simple (yet critical) queries my worker is running. The DB is using the experimental d1 backend. Is there a tried and true way to get to the bottom of why this is happening?
MCan you share your database ID here, and an example query? Is this deterministic - e.g. a specific query always causes the error?
MSeems to be, will DM
M@Matt sent.
IDo you have a primary key column?
IWhen you configure a database you need a primary key column (or columns) so that the database knows what data should unique. If you don't set that up, how would the DB know what is new and what is data to be replaced?
IYes!
II'd personally learn to use an actual SQL query (either via the browser console, or directly from
wrangler d1 execute), which allows more granular control than the Ui in the dashboard, and repeatable creations.IBut this would work.
Myeah it's 3 text fields (all fields <100chars) and an ID, so I seriously doubt I'm hitting any limits. Will watch out for better error messages though
L,Hi all,
I am having an issue with my D1 database. When attempting to index one of the columns I get the error below:
ERROR 9015: SQL engine error: query error: Error code 11: The database disk image is malformed (database disk image is malformed).
CREATE INDEX idx_teams_team_name ON teams(team_name);
Any idea what can I do to get around this? The table has about 90k rows; I surely need an index to search on this column
I am having an issue with my D1 database. When attempting to index one of the columns I get the error below:
ERROR 9015: SQL engine error: query error: Error code 11: The database disk image is malformed (database disk image is malformed).
CREATE INDEX idx_teams_team_name ON teams(team_name);
Any idea what can I do to get around this? The table has about 90k rows; I surely need an index to search on this column
CDo you have the database ID? Sounds like something that the D1 team is going to want to look at on their side
LI restored the database to a 1 day old copy and now it works, the index created. I will need to reload about 40k records, but it is what it is 
MIt sounds like you’re using the original alpha backend - that error is very specific to it.
Msee the note about the experimental backend - https://developers.cloudflare.com/d1/get-started/#2-create-a-database
SHi, is the performance between getting data from KV versus from D1 neglible ? (assuming the DB lookup is a find on PK)
SI'm building on a website that caches all the data from the headless CMS on cloudflare using KV. When the DB has an update a webhook pings the worker and updates the cache. The website makes requests to the same worker that fetches from the cache, and hydrates the HTML before sending back to the user
SBecause KV doesn't provide cache tagging its quite difficult to manage the cache (with nested data and making sure those nested items stay fresh). I want to store the cache in a D1 so I can more easily lookup data that needs refreshing
TI'm pretty curious about this: KV is not transaction-ready, is D1 transaction ready? If I have an user from US made a request to my page function using D1 in APAC, will the request take longer? Is there any worker+D1 replica in US which can handle the request for me? If there is and D1 supports transaction, will there any penalty on performance or request time?
VD1 is single writer multi reader (or at least will be)
Vbut KV and D1 are entirely different products for different usecases
Tquick question, i designed microservices with 1ms : 1db design, however, we are limited to 10DB currently per account, knowing i have several sites under my account, so i guess i have to fit them in, my question is does D1 experience the same issues with normal relations db like table locking, running out of resource etc?
Tbecause if D1 is efficient enough that table locking is not much of an issue, i guess ill go with a monolitic DB design and lots of workers
MYou can have multiple concurrent readers. Reads don’t block.
UIts rounded up. So a unit of 0.00000000000001 would still be 1 full unit
SHi team, can we use SQLite triggers in d1?
SMy usecase is as follows:
S
-- Create a table. And an external content fts5 table to index it.
CREATE TABLE tbl(a INTEGER PRIMARY KEY, b, c);
CREATE VIRTUAL TABLE fts_idx USING fts5(b, c, content='tbl', content_rowid='a');
-- Triggers to keep the FTS index up to date.
CREATE TRIGGER tbl_ai AFTER INSERT ON tbl BEGIN
INSERT INTO fts_idx(rowid, b, c) VALUES (new.a, new.b, new.c);
END;
CREATE TRIGGER tbl_ad AFTER DELETE ON tbl BEGIN
INSERT INTO fts_idx(fts_idx, rowid, b, c) VALUES('delete', old.a, old.b, old.c);
END;
CREATE TRIGGER tbl_au AFTER UPDATE ON tbl BEGIN
INSERT INTO fts_idx(fts_idx, rowid, b, c) VALUES('delete', old.a, old.b, old.c);
INSERT INTO fts_idx(rowid, b, c) VALUES (new.a, new.b, new.c);
END;
SBasically using triggers to keep the fts5 virtual table indexes in sync with a content table, is this possible?
MI currently use triggers in D1. So yes.
