{"id":46385565,"url":"https://github.com/coji/kysely-duckdb-wasm","last_synced_at":"2026-03-05T07:13:47.534Z","repository":{"id":250543902,"uuid":"834368962","full_name":"coji/kysely-duckdb-wasm","owner":"coji","description":"Kysely dialect for duckdb 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returned=1 errno=0 peeraddr=140.82.121.6:443 state=error: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["duckdb","kysely","query-builder","sql","typescript","wasm"],"created_at":"2026-03-05T07:13:47.363Z","updated_at":"2026-03-05T07:13:47.525Z","avatar_url":"https://github.com/coji.png","language":"TypeScript","readme":"# Kysely Dialect for DuckDB Wasm\n\n[![test](https://github.com/runoshun/kysely-duckdb/actions/workflows/test.yml/badge.svg)](https://github.com/runoshun/kysely-duckdb/actions/workflows/test.yml)\n\nThis dialect allows you to use [Kysely](https://kysely.dev/) with [DuckDB Wasm](https://duckdb.org/docs/api/wasm/overview.html).\n\nThis is forked from [kysely-duckdb](https://github.com/runoshun/kysely-duckdb).\n\n### Installation\n\n```bash\nnpm install --save kysely @duckdb/duckdb-wasm @coji/kysely-duckdb-wasm\n```\n\n### Usage\n\n```ts\nimport * as duckdb from '@duckdb/duckdb-wasm'\nimport duckdbWorker from '@duckdb/duckdb-wasm/dist/duckdb-browser-eh.worker.js?worker'\nimport duckdbWasm from '@duckdb/duckdb-wasm/dist/duckdb-eh.wasm?url'\nimport { Kysely } from 'kysely'\nimport { DuckDbDialect } from '@coji/kysely-duckdb-wasm'\n\nconst logger = new duckdb.ConsoleLogger(duckdb.LogLevel.ERROR)\nconst worker = new duckdbWorker()\nconst db = new duckdb.AsyncDuckDB(logger, worker)\nawait db.instantiate(duckdbWasm)\n\nconst duckdbDialect = new DuckDbDialect({\n  database: db,\n  tableMappings: {},\n})\n\nconst kysely = new Kysely\u003cDatabaseSchema\u003e({ dialect: duckdbDialect })\nconst res = await kysely.selectFrom('person').selectAll().execute()\n```\n\n### Configurations\n\nThe configuration object of `DuckDbDialect` can contain the following properties:\n\n- `tableMappings`: A mapping of table names in Kysely to DuckDB table expressions. This is useful if you want to use DuckDB's external data sources, such as JSON files or CSV files.\n\n### DuckDB DataTypes Supports (Experimental Feature)\n\nDuckDB supports various data types like arrays, structs, blobs and more.\nKysely has not built in supports for these types, but it can handle almost\nof these using [raw SQL](https://kysely.dev/docs/recipes/raw-sql) feature.\n\nThis package includes some shallow helper for these types.\n\n```ts\nimport type { DuckDBWasmDataTypes } from '@coji/kysely-duckdb-wasm'\nimport { datatypes } from '@coji/kysely-duckdb-wasm'\n\n// DuckDBWasmDataTypes: type mappings for table schema\nexport interface Database {\n  t1: {\n    int_list: number[];\n    string_list: string[];\n    map1: DuckDBWasmDataTypes[\"MAP\"]; // `map` is alias of string now. The returned value from duckdb is like '{a=1,b=2}'\n    struct1: {\n      x: number;\n      y: string;\n    };\n    bitstring1: DuckDBWasmDataTypes[\"BIT\"];\n    blob1: DuckDBWasmDataTypes[\"BLOB\"];\n    bool1: DuckDBWasmDataTypes[\"BOOLEAN\"];\n    date1: DuckDBWasmDataTypes[\"DATE\"];\n    timestamp1: DuckDBWasmDataTypes[\"TIMESTAMP\"];\n    timestamptz1: DuckDBWasmDataTypes[\"TIMESTAMPTZ\"];\n    interval1: DuckDBWasmDataTypes[\"INTERVAL\"];\n  };\n}\n\n...\n\n// datatypes: type constructors\nconst kysely = new Kysely\u003cDatabase\u003e({ dialect: duckDbDialect })\nawait kysely\n  .insertInto(\"t1\")\n  .values([{\n    int_list: datatypes.list([3, 4, 5]),\n    string_list: datatypes.list([\"d\", \"e\", \"f\"]),\n    map1: datatypes.map([[1, 2], [3, 4]]),\n    struct1: datatypes.struct({\n      x: sql`${1}`,\n      y: sql`${\"aaa\"}`,\n    }),\n    bitstring1: datatypes.bit('010101'),\n    blob1: datatypes.blob(new Uint8Array([0xBB, 0xCC])),\n    bool1: true,\n    date1: datatypes.date(new Date()),\n    timestamp1: datatypes.timestamp(new Date()),\n    timestamptz1: datatypes.timestamptz(new Date().toISOString().slice(0, -1) + '+03:00'),\n    interval1: sql`INTERVAL 1 YEAR`,\n  }])\n  .execute();\n```\n","funding_links":[],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fcoji%2Fkysely-duckdb-wasm","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fcoji%2Fkysely-duckdb-wasm","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fcoji%2Fkysely-duckdb-wasm/lists"}