Deno's KV Store

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1 min read

Deno’s KV database (Key Value) certainly gives me a bit of a warm nostalgic feeling for M Globals.

typescript
const eaKv = await Deno.openKv("./EA");
const paddedId = "    917";
const EMP = "EMPLOYEE";
await eaKv.set([EMP, paddedId], "Aaron");
await eaKv.set([EMP, "   0234"], "JRR Tolkien");
await eaKv.set([EMP, "     51"], "Agatha Christie");
const aaron = await eaKv.get([EMP, paddedId]);
console.log(`Data for ${paddedId}`, aaron);
console.log("-------------------------------------------");
console.log("All employees, $ORDER ANYONE?");
for await (const res of eaKv.list({ prefix: [EMP] })) {
    console.log(res);
}

It’s beta so you need to add a command-line flag to enable the functionality:

console
> deno run -A --unstable-kv main.ts

Results …

console
Data for     917 {
  key: [ "EMPLOYEE", "    917" ],
  value: "Aaron",
  versionstamp: "000000000000004b0000"
}
-------------------------------------------
All Employees, $ORDER ANYONE?
{
  key: [ "EMPLOYEE", "     51" ],
  value: "Agatha Christie",
  versionstamp: "00000000000000570000"
}
{
  key: [ "EMPLOYEE", "    917" ],
  value: "Aaron",
  versionstamp: "000000000000004b0000"
}
{
  key: [ "EMPLOYEE", "   0234" ],
  value: "JRR Tolkien",
  versionstamp: "00000000000000500000"
}

There’s a local version that runs within the Deno runtime and backed by a Sqlite database.

Windows Install

You can install Deno in Windows with winget:

console
winget install deno
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