Feature: Canner enterprise connector

packages/extension-driver-canner/.eslintrc.json

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+{
+  "extends": ["../../.eslintrc.json"],
+  "ignorePatterns": ["!**/*"],
+  "overrides": [
+    {
+      "files": ["*.ts", "*.tsx", "*.js", "*.jsx"],
+      "rules": {}
+    },
+    {
+      "files": ["*.ts", "*.tsx"],
+      "rules": {}
+    },
+    {
+      "files": ["*.js", "*.jsx"],
+      "rules": {}
+    }
+  ]
+}

packages/extension-driver-canner/README.md

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+# extension-driver-canner
+
+Connect to [canner enterprise](https://docs.cannerdata.com/product/api_sdk/pg/pg_overview) through PostgreSQL Wire Protocol
+
+## Install
+
+1. Install package
+
+   ```sql
+   npm i @vulcan-sql/extension-driver-canner
+   ```
+
+2. Update `vulcan.yaml`, enable the extension.
+
+   ```yaml
+   extensions:
+     canner: '@vulcan-sql/extension-driver-canner'
+   ```
+
+3. Create a new profile in `profiles.yaml` or in your profiles' paths.
+
+   ```yaml
+   - name: canner # profile name
+     type: canner
+     connection:
+
+
+      # Optional: Server host.
+      host: string
+      # Optional: The user to connect to canner enterprise. Default canner
+      user: string
+      # Optional: Password to connect to canner enterprise. should be the user PAT in canner enterprise
+      password: string
+      # Optional: sql name of the workspace.
+      database: string
+      # Optional: canner enterprise PostgreSQL wire protocol port
+      port: 7432
+      # Optional: The max rows we should fetch once.
+      chunkSize: 100
+      # Optional: Maximum number of clients the pool should contain.
+      max: 10
+      # Optional: Number of milliseconds before a statement in query will time out, default is no timeout
+      statement_timeout: 0
+      # Optional: Passed directly to node.TLSSocket, supports all tls.connect options
+      ssl: false
+      # Optional: Number of milliseconds before a query call will timeout, default is no timeout
+      query_timeout: 0
+      # Optional: The name of the application that created this Client instance
+      application_name: string
+      # Optional: Number of milliseconds to wait for connection, default is no timeout
+      connectionTimeoutMillis: 0
+      # Optional: Number of milliseconds before terminating any session with an open idle transaction, default is no timeout
+      idle_in_transaction_session_timeout: 0
+      # Optional: Number of milliseconds a client must sit idle in the pool and not be checked out before it is disconnected from the backend and discarded.
+      idleTimeoutMillis: 10000
+   ```

packages/extension-driver-canner/jest.config.ts

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+module.exports = {
+  displayName: 'extension-driver-canner',
+  preset: '../../jest.preset.ts',
+  globals: {
+    'ts-jest': {
+      tsconfig: '<rootDir>/tsconfig.spec.json',
+    },
+  },
+  transform: {
+    '^.+\\.[tj]s$': 'ts-jest',
+  },
+  moduleFileExtensions: ['ts', 'js', 'html', 'node'],
+  coverageDirectory: '../../coverage/packages/extension-driver-canner',
+  testEnvironment: 'node',
+};

packages/extension-driver-canner/package.json

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+{
+  "name": "@vulcan-sql/extension-driver-canner",
+  "description": "Canner Enterprise driver for Vulcan SQL",
+  "version": "0.4.0",
+  "type": "commonjs",
+  "publishConfig": {
+    "access": "public"
+  },
+  "keywords": [
+    "vulcan",
+    "vulcan-sql",
+    "data",
+    "sql",
+    "database",
+    "data-warehouse",
+    "data-lake",
+    "api-builder",
+    "postgres",
+    "pg"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/Canner/vulcan.git"
+  },
+  "license": "MIT",
+  "peerDependencies": {
+    "@vulcan-sql/core": "~0.4.0-0"
+  }
+}

packages/extension-driver-canner/project.json

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+{
+  "root": "packages/extension-driver-canner",
+  "sourceRoot": "packages/extension-driver-canner/src",
+  "targets": {
+    "build": {
+      "executor": "@nrwl/workspace:run-commands",
+      "options": {
+        "command": "yarn ts-node ./tools/scripts/replaceAlias.ts extension-driver-canner"
+      },
+      "dependsOn": [
+        {
+          "projects": "self",
+          "target": "tsc"
+        }
+      ]
+    },
+    "tsc": {
+      "executor": "@nrwl/js:tsc",
+      "outputs": ["{options.outputPath}"],
+      "options": {
+        "outputPath": "dist/packages/extension-driver-canner",
+        "main": "packages/extension-driver-canner/src/index.ts",
+        "tsConfig": "packages/extension-driver-canner/tsconfig.lib.json",
+        "assets": ["packages/extension-driver-canner/*.md"],
+        "buildableProjectDepsInPackageJsonType": "dependencies"
+      },
+      "dependsOn": [
+        {
+          "projects": "dependencies",
+          "target": "build"
+        }
+      ]
+    },
+    "lint": {
+      "executor": "@nrwl/linter:eslint",
+      "outputs": ["{options.outputFile}"],
+      "options": {
+        "lintFilePatterns": ["packages/extension-driver-canner/**/*.ts"]
+      }
+    },
+    "test": {
+      "executor": "@nrwl/jest:jest",
+      "outputs": ["coverage/packages/extension-driver-canner"],
+      "options": {
+        "jestConfig": "packages/extension-driver-canner/jest.config.ts",
+        "passWithNoTests": true
+      }
+    },
+    "publish": {
+      "executor": "@nrwl/workspace:run-commands",
+      "options": {
+        "command": "node ../../../tools/scripts/publish.mjs {args.tag} {args.version}",
+        "cwd": "dist/packages/extension-driver-canner"
+      },
+      "dependsOn": [
+        {
+          "projects": "self",
+          "target": "build"
+        }
+      ]
+    }
+  },
+  "tags": []
+}

packages/extension-driver-canner/src/index.ts

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+export * from './lib/cannerDataSource';
+import { CannerDataSource } from './lib/cannerDataSource';
+export default [CannerDataSource];

packages/extension-driver-canner/src/lib/cannerAdapter.ts

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+import axios from 'axios';
+import { PGOptions } from './cannerDataSource';
+import { ConnectionOptions } from 'tls';
+import { createEnvConfig } from './config';
+
+const envConfig = createEnvConfig();
+
+export class CannerAdapter {
+  public readonly host: string;
+  public readonly workspaceSqlName: string;
+  public readonly PAT: string | (() => string | Promise<string>);
+  public readonly ssl: boolean | ConnectionOptions;
+  private baseUrl: string | undefined;
+
+  constructor(options?: PGOptions) {
+    if (!options) {
+      throw new Error(`connection options is required`);
+    }
+    const { host, database, password, ssl = false } = options;
+    if (!host || !database || !password) {
+      throw new Error(`host, database and password are required`);
+    }
+    this.host = host;
+    this.workspaceSqlName = database;
+    this.PAT = password;
+    this.ssl = ssl;
+  }
+
+  // When querying Canner enterprise, the Canner enterprise will save the query result as parquet files,
+  // and store them in S3. This method will return the S3 urls of the query result.
+  // For more Canner API ref: https://docs.cannerdata.com/reference/restful
+  public async createAsyncQueryResultUrls(sql: string): Promise<string[]> {
+    let data = await this.getWorkspaceRequestData('post', '/v2/async-queries', {
+      data: {
+        sql,
+        timeout: 600,
+        noLimit: true,
+      },
+    });
+
+    const { id: requestId } = data;
+    await this.waitAsyncQueryToFinish(requestId);
+
+    // get the query result after the query finished
+    data = await this.getRequestInfo(requestId);
+    if (data.error?.message) {
+      throw new Error(data.error.message);
+    }
+    const urls = await this.getAsyncQueryResultUrls(requestId);
+    return urls;
+  }
+
+  private async getWorkspaceRequestData(
+    method: string,
+    urlPath: string,
+    options?: Record<string, any>
+  ) {
+    await this.prepare();
+    const response = await axios({
+      headers: {
+        Authorization: `Token ${this.PAT}`,
+      },
+      params: {
+        workspaceSqlName: this.workspaceSqlName,
+      },
+      url: `${this.baseUrl}${urlPath}`,
+      method,
+      ...options,
+    });
+    if (response.status !== 200) {
+      throw new Error(
+        `Failed to get workspace request "${urlPath}" data, status: ${
+          response.status
+        }, data: ${JSON.stringify(response.data)}`
+      );
+    }
+    return response.data;
+  }
+
+  private async prepare() {
+    if (this.baseUrl) {
+      return;
+    }
+    const response = await axios({
+      method: 'get',
+      maxBodyLength: Infinity,
+      url: `${this.getCannerUrl()}/cluster-info`,
+      headers: {},
+    });
+    const { restfulApiBaseEndpoint } = response.data;
+    if (!restfulApiBaseEndpoint) {
+      throw new Error(
+        `The restful API base endpoint is not found, please check "restfulApiBaseEndpoint" field from "/cluster-info" endpoint of Canner Enterprise`
+      );
+    }
+
+    this.baseUrl = restfulApiBaseEndpoint;
+  }
+
+  private getCannerUrl() {
+    if (envConfig.isOnKubernetes) {
+      // use env to get the endpoint in k8s
+      return `http://${envConfig.webServiceHost}`;
+    } else {
+      // otherwise use the host user provided
+      const protocol = this.ssl ? 'https' : 'http';
+      return `${protocol}://${this.host}`;
+    }
+  }
+
+  private async waitAsyncQueryToFinish(requestId: string) {
+    let data = await this.getRequestInfo(requestId);
+    // FINISHED & FAILED are the end state of a async request, and the result urls will be generated only after the request is finished.
+    while (!['FINISHED', 'FAILED'].includes(data.status)) {
+      await new Promise((resolve) => setTimeout(resolve, 1000));
+      data = await this.getRequestInfo(requestId);
+    }
+  }
+
+  private async getRequestInfo(requestId: string) {
+    const data = await this.getWorkspaceRequestData(
+      'get',
+      `/v2/async-queries/${requestId}`
+    );
+    return data;
+  }
+
+  private async getAsyncQueryResultUrls(requestId: string): Promise<string[]> {
+    const data = await this.getWorkspaceRequestData(
+      'get',
+      `/v2/async-queries/${requestId}/result/urls`
+    );
+    return data.urls || [];
+  }
+}