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1cd5426aea
Use Napi to write a Node.js SDK that follows Polars for better maintainability, while keeping most of the logic in Rust.
71 lines
2.1 KiB
TypeScript
71 lines
2.1 KiB
TypeScript
// Copyright 2024 Lance Developers.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import { toBuffer } from "./arrow";
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import { Connection as _NativeConnection } from "./native";
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import { Table } from "./table";
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import { Table as ArrowTable } from "apache-arrow";
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/**
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* A LanceDB Connection that allows you to open tables and create new ones.
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*
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* Connection could be local against filesystem or remote against a server.
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*/
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export class Connection {
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readonly inner: _NativeConnection;
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constructor(inner: _NativeConnection) {
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this.inner = inner;
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}
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/** List all the table names in this database. */
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async tableNames(): Promise<string[]> {
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return this.inner.tableNames();
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}
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/**
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* Open a table in the database.
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*
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* @param name The name of the table.
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* @param embeddings An embedding function to use on this table
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*/
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async openTable(name: string): Promise<Table> {
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const innerTable = await this.inner.openTable(name);
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return new Table(innerTable);
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}
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/**
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* Creates a new Table and initialize it with new data.
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*
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* @param {string} name - The name of the table.
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* @param data - Non-empty Array of Records to be inserted into the table
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*/
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async createTable(
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name: string,
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data: Record<string, unknown>[] | ArrowTable
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): Promise<Table> {
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const buf = toBuffer(data);
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const innerTable = await this.inner.createTable(name, buf);
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return new Table(innerTable);
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}
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/**
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* Drop an existing table.
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* @param name The name of the table to drop.
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*/
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async dropTable(name: string): Promise<void> {
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return this.inner.dropTable(name);
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}
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}
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