├── .gitignore
├── LICENSE
├── Pulumi.dev.yaml
├── Pulumi.yaml
├── README.md
├── index.ts
├── package-lock.json
├── package.json
├── snowflake
├── SnowflakeGenericProvider.ts
├── request_translator.js
├── response_translator.js
└── table_function_body.sql
└── tsconfig.json
/.gitignore:
--------------------------------------------------------------------------------
1 | /bin/
2 | .idea
3 | /node_modules/
4 |
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/LICENSE:
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/Pulumi.dev.yaml:
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1 | encryptionsalt: v1:4zyhWwmqQrc=:v1:gynqxJiaBrpbvhJC:KJ+5hm+BoN/2vzA4FR8q8VFUGBpjgw==
2 | config:
3 | aws:region: us-west-2
4 | snowflake:browserAuth: "true"
5 |
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/Pulumi.yaml:
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1 | name: athena
2 | description: A Snowflake to Mysql Query Program (via Athena)
3 | runtime: nodejs
4 |
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/README.md:
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1 | # A Source Connector Framework for Snowflake
2 |
3 | This directory holds a pulumi deployment that allows Snowflake users to query alternative sources (specifically MySQL). You can learn more about this by reading our series of [blog posts](https://www.sundeck.io/blog/creating-a-source-connector-framework-for-snowflake)
4 |
5 | ## Deploy AWS & Snowflake Assets
6 | 1. Ensure you're logged into AWS and your credentials are setup correctly.
7 | 1. Install Pulumi ([instructions](https://www.pulumi.com/docs/get-started/install/))
8 | 1. Configure pulumi for first use.
9 | ```bash
10 | # Configure with local settings. You could also configure with Pulumi cloud but that takes more time.
11 | pulumi login --local
12 | ```
13 | 1. Install node/npm ([instructions](https://nodejs.org/en/download/))
14 | 1. Clone the repository and install the required NPM packages.
15 | ```
16 | git clone https://github.com/sundeck-io/snowflake-connector-framework.git
17 | npm update
18 | ```
19 |
20 | 1. Configure your account & username for snowflake:
21 | ```
22 | cd snowflake-connectors/athena
23 | pulumi config set snowflake:account YOURACCOUNTLOCATOR
24 | pulumi config set snowflake:username YOURSNOWFLAKEUSERNAME
25 | ```
26 | 1. Setup AWS & Snowflake
27 | ```bash
28 | # During execution, pulumi will prompt you one or more times to login to Snowflake via browser.
29 | # Most of the operations are quick but the following take a while:
30 | #
31 | # * Creation of a MySQL RDS instance takes 2-3 minutes.
32 | # * Deployment of MySQL Athena connector Lambda takes 2-3 minutes.
33 | #
34 | # Unfortunately, since the lambda connector needs info from the RDS instance post
35 | # deploy (connection string), they have to run serially.
36 | #
37 | # Note: If you see any Snowflake operations taking more than a couple seconds, that typically
38 | # means you've missed a login window. Check all your tabs!
39 | #
40 | pulumi up -y
41 | ```
42 |
43 | ## Query MySQL (or any Athena source)
44 | 1. Go into Snowflake Snowsight (or your preferred SQL tool).
45 | 1. Execute a query in Snowflake against your new MySQL instance.
46 | ```sql
47 | use sundeck_connectors.athena;
48 | select * from table(query_athena($$
49 | select * from mysql.information_schema.tables
50 | $$, 100));
51 | ```
52 | 1. By default, all data comes back as a variant column. This is due to the fact that a UDTF needs to have schema declared at creation time. As such, our declared schema is a single variant column called `data`. If you want to make things more typed, you can create a view on top of your table function invocation. For example:
53 | ```sql
54 | CREATE VIEW mysql_information_schema_tables AS
55 | SELECT
56 | data:table_catalog::text AS table_catalog,
57 | data:table_schema::text AS table_schema,
58 | data:table_name::text AS table_name,
59 | data:table_type::text AS table_type
60 | FROM TABLE(query_athena($$
61 | SELECT * FROM mysql.information_schema.tables
62 | $$, 100));
63 | ```
64 |
65 | ## Frequently Asked Questions
66 |
67 | - How does this all work?
68 | - See our Blog post on the topic!
69 | - What is Pulumi?
70 | - Pulumi is a infrastructure automation tool, similar to Terraform or AWS CloudFormation.
71 | - Why use Pulumi?
72 | - In order to deploy an external function, there is some back and forth between AWS and Snowflake. (You need take information from each and give it to the other). Rather than make people go through a bunch of steps, Pulumi allows us to automatically move the configuration between the two systems to make it easier to setup an external function.
73 | - What if I want to configure things manually?
74 | - Pulumi is largely declarative. Most of the deployment code should readable even if you've never used Pulumi
75 | - What does Sundeck do?
76 | - We're working on some new ways to enhance Snowflake. More coming soon. Go to our website and sign up for our mailing list to hear more as we progress.
77 |
78 |
79 |
--------------------------------------------------------------------------------
/index.ts:
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1 | import * as pulumi from "@pulumi/pulumi";
2 | import * as aws from "@pulumi/aws";
3 | import * as snowflake from "@pulumi/snowflake";
4 | import * as crypto from "crypto";
5 | import * as fs from "fs";
6 | import * as awsx from "@pulumi/awsx";
7 | import * as random from "@pulumi/random";
8 | import {GenericSnowflake} from "./snowflake/SnowflakeGenericProvider";
9 |
10 | ///////////////////////////////////////////////////////////////////////////
11 | // Default names for objects.
12 | const functionInvocationRoleName = "SNOWFLAKE_CONNECTOR_INBOUND_REST_ROLE";
13 | const connectorsDatabaseName = "SUNDECK_CONNECTORS";
14 | const lambdaFunctionName = "mysql";
15 | ///////////////////////////////////////////////////////////////////////////
16 |
17 | const identity = aws.getCallerIdentity({});
18 | const currentRegion = pulumi.output(aws.getRegion()).name;
19 | const currentAccount = identity.then(c => c.accountId);
20 | const vpc = awsx.ec2.Vpc.getDefault();
21 | const vpcId = vpc.id;
22 |
23 |
24 | // Create an AWS resource (S3 Bucket) !!NOTE!! that this is declared that it will delete on pulumi down.
25 | const athenaResultsBucket = new aws.s3.BucketV2("athena.results", {forceDestroy: true});
26 |
27 | // Ensure the bucket disables public access
28 | const blockS3PublicAccess = new aws.s3.BucketPublicAccessBlock("athenaResultsBlockPublicAccess", {
29 | bucket: athenaResultsBucket.id,
30 | blockPublicAcls: true,
31 | blockPublicPolicy: true,
32 | ignorePublicAcls: true,
33 | restrictPublicBuckets: true,
34 | });
35 |
36 | // Create a database for our connector.
37 | const db = new snowflake.Database("snowflake.database", {name: connectorsDatabaseName});
38 | const schema = new snowflake.Schema("snowflake.schema", {database: db.name, name: "ATHENA"});
39 |
40 | // Create a role that will be applied to api requests so that they can use Athena
41 | const athenaRole = new aws.iam.Role("athena.role", {
42 | namePrefix: "athenaAssumeRole",
43 | assumeRolePolicy: JSON.stringify({
44 | Version: "2012-10-17",
45 | Statement: [ {
46 | "Effect": "Allow",
47 | "Principal": {
48 | "Service": "apigateway.amazonaws.com"
49 | },
50 | "Action": "sts:AssumeRole"
51 | }],}),
52 | managedPolicyArns: ["arn:aws:iam::aws:policy/AmazonAthenaFullAccess"],
53 | inlinePolicies: [{name: "allow-s3-bucket-access", policy: pulumi.all([athenaResultsBucket.arn]).apply((arn) => JSON.stringify({
54 | Version: "2012-10-17",
55 | Statement: [{
56 | "Sid": "VisualEditor0",
57 | "Effect": "Allow",
58 | "Action": [
59 | "s3:ListMultipartUploadParts",
60 | "s3:PutObject",
61 | "s3:GetObject",
62 | "s3:PutBucketNotification",
63 | "s3:ListBucket"
64 | ],
65 | "Resource": arn + "/*"
66 | }],
67 | }))}]
68 | });
69 |
70 | // Create the api gateway we'll call.
71 | const restApi = new aws.apigateway.RestApi("rest.api", {
72 | endpointConfiguration: {
73 | types: "REGIONAL"
74 | }
75 | }
76 | );
77 |
78 | // Create a role that will allow Snowflake to access our rest api. We are referring to a role we haven't yet created.
79 | const snowflakeApiIntegration = pulumi.all([restApi.id, currentRegion, currentAccount]).apply(([restApiId, region, accountId]) => new snowflake.ApiIntegration("snowflake.apiIntegration", {
80 | apiAllowedPrefixes: [`https://${restApiId}.execute-api.${region}.amazonaws.com/`],
81 | apiAwsRoleArn: `arn:aws:iam::${accountId}:role/${functionInvocationRoleName}`,
82 | apiProvider: "aws_api_gateway",
83 | enabled: true,
84 | }));
85 |
86 | // Create an athena invocation resource
87 | const athenaResource = new aws.apigateway.Resource("rest.athenaResource", {
88 | restApi: restApi.id,
89 | parentId: restApi.rootResourceId,
90 | pathPart: "athena",
91 | });
92 |
93 | // Enable the post method for the athena resource.
94 | const postMethod = new aws.apigateway.Method("rest.athenaMethod", {
95 | restApi: restApi.id,
96 | resourceId: athenaResource.id,
97 | httpMethod: "POST",
98 | authorization: "AWS_IAM",
99 | requestParameters: {
100 | "method.request.querystring.action": false
101 | },
102 | });
103 |
104 | // Set the default response model to json.
105 | const postMethod200Response = new aws.apigateway.MethodResponse("rest.athena200Response", {
106 | restApi: restApi.id,
107 | resourceId: athenaResource.id,
108 | httpMethod: postMethod.httpMethod,
109 | statusCode: "200",
110 | responseModels: {
111 | "application/json": "Empty"
112 | }
113 | });
114 |
115 | // define a integration operation that adds a header and converts a query string to a header.
116 | const gatewayIntegration = new aws.apigateway.Integration("rest.requestIntegration", {
117 | restApi: restApi.id,
118 | resourceId: athenaResource.id,
119 | httpMethod: postMethod.httpMethod,
120 | integrationHttpMethod: "POST",
121 | type: "AWS",
122 | uri: pulumi.interpolate `arn:aws:apigateway:${currentRegion}:athena:path//`,
123 | credentials: athenaRole.arn,
124 | requestParameters: {
125 | "integration.request.header.Content-Type": "'application/x-amz-json-1.1'",
126 | "integration.request.header.X-Amz-Target": "method.request.querystring.action"
127 | },
128 | passthroughBehavior: "WHEN_NO_MATCH"
129 | });
130 |
131 | const athenaPostIntegrationResponse = new aws.apigateway.IntegrationResponse("rest.athenaPostIntegrationResponse", {
132 | restApi: restApi.id,
133 | resourceId: athenaResource.id,
134 | httpMethod: postMethod.httpMethod,
135 | statusCode: postMethod200Response.statusCode
136 | }, {dependsOn: gatewayIntegration});
137 |
138 |
139 | // deploy a javascript request translator
140 | const requestTranslator = new snowflake.Function("snowflake.requestTranslator", {
141 | name: "REQUEST_TRANSLATOR",
142 | arguments: [{name: "event", type: "object"}],
143 | database: db.name,
144 | schema: schema.name,
145 | language: "javascript",
146 | statement: pulumi.all( [athenaResultsBucket.bucket]).apply(([bucket]) =>
147 | `${file('snowflake/request_translator.js')}\nreturn translate_request(EVENT);`
148 | .replace('INSERTBUCKETNAMEHERE', bucket)),
149 | returnType: "object"
150 | });
151 |
152 | // deploy a javascript response translator
153 | const responseTranslator = new snowflake.Function("snowflake.responseTranslator", {
154 | name: "RESPONSE_TRANSLATOR",
155 | arguments: [{name: "event", type: "object"}],
156 | database: db.name,
157 | schema: schema.name,
158 | language: "javascript",
159 | statement: `${file('snowflake/response_translator.js')}\nreturn translate_response(EVENT);`,
160 | returnType: "object"
161 | });
162 |
163 | // generate a mysql password
164 | const mysqlPasswordGenerator = new random.RandomString("mysql.password", {length: 20, upper: true, special: false, lower: true})
165 |
166 | // export the mysql password to the cli.
167 | export const mysqlPassword = mysqlPasswordGenerator.result;
168 |
169 | // create a mysql rds instance.
170 | const mysql = new aws.rds.Instance("mysql.t3micro", {
171 | identifier: "mysql-snowflake-connector",
172 | allocatedStorage: 10,
173 | dbName: "mydb",
174 | engine: "mysql",
175 | engineVersion: "5.7",
176 | instanceClass: "db.t3.micro",
177 | parameterGroupName: "default.mysql5.7",
178 | password: mysqlPassword,
179 | skipFinalSnapshot: true,
180 | username: "root",
181 | });
182 |
183 | // create a new role for the lambda that will be used as the
184 | const athenaLambdaRole = new aws.iam.Role("lambda.mysqlConnectorRole", {
185 | namePrefix: "athenaMysqlLambda",
186 | assumeRolePolicy: JSON.stringify({
187 | "Version": "2012-10-17",
188 | "Statement": [
189 | {
190 | "Effect": "Allow",
191 | "Principal": {
192 | "Service": "lambda.amazonaws.com"
193 | },
194 | "Action": "sts:AssumeRole"
195 | }
196 | ]
197 | }),
198 | inlinePolicies: [{name: "athenamysql", policy: pulumi.all([currentRegion, currentAccount, athenaResultsBucket.bucket]).apply(([region, account, bucket]) => JSON.stringify({
199 | Version: "2012-10-17",
200 | Statement: [
201 | {
202 | "Effect": "Allow",
203 | "Action": [
204 | "secretsmanager:GetSecretValue",
205 | ],
206 | "Resource": `arn:aws:secretsmanager:${region}:${account}:secret:AthenaSecret*`
207 | },
208 | {
209 | "Effect": "Allow",
210 | "Action": [
211 | "logs:CreateLogGroup",
212 | ],
213 | "Resource": `arn:aws:logs:${region}:${account}*`
214 | },
215 | {
216 | "Effect": "Allow",
217 | "Action": [
218 | "logs:CreateLogStream",
219 | "logs:PutLogEvents"
220 | ],
221 | "Resource": `arn:aws:logs:${region}:${account}:log-group:/aws/lambda/${lambdaFunctionName}:*`
222 | },
223 | {
224 | "Effect": "Allow",
225 | "Action": [
226 | "athena:GetQueryExecution",
227 | "s3:ListAllMyBuckets"
228 | ],
229 | "Resource": "*"
230 | },
231 | {
232 | "Effect": "Allow",
233 | "Action": [
234 | "s3:GetObject",
235 | "s3:ListBucket",
236 | "s3:GetBucketLocation",
237 | "s3:GetObjectVersion",
238 | "s3:PutObject",
239 | "s3:PutObjectAcl",
240 | "s3:GetLifecycleConfiguration",
241 | "s3:PutLifecycleConfiguration",
242 | "s3:DeleteObject"
243 | ],
244 | "Resource": [
245 | `arn:aws:s3:::${bucket}`,
246 | `arn:aws:s3:::${bucket}/*`
247 | ]
248 | },
249 | {
250 | "Effect": "Allow",
251 | "Action": [
252 | "logs:CreateLogStream",
253 | "logs:PutLogEvents"
254 | ],
255 | "Resource": `arn:aws:logs:${region}:${account}:log-group:/aws/lambda/${lambdaFunctionName}:*`
256 | },
257 | {
258 | "Effect": "Allow",
259 | "Action": [
260 | "ec2:CreateNetworkInterface",
261 | "ec2:DeleteNetworkInterface",
262 | "ec2:DescribeNetworkInterfaces",
263 | "ec2:DetachNetworkInterface"
264 | ],
265 | "Resource": "*"
266 | }
267 | ],
268 | }))}]
269 | });
270 |
271 | const variables = {
272 | "default": pulumi.interpolate `mysql://jdbc:mysql://root:${mysqlPassword}@${mysql.endpoint}/mydb`,
273 | "disable_spill_encryption": "false",
274 | "spill_bucket": athenaResultsBucket.bucket,
275 | "spill_prefix": "athena-spill",
276 | }
277 |
278 | const envName = `${lambdaFunctionName}_connection_string`;
279 |
280 | // @ts-ignore
281 | variables[envName]= pulumi.interpolate `mysql://jdbc:mysql://root:${mysqlPassword}@${mysql.endpoint}/mydb`;
282 |
283 | const mysqlFunction = new aws.lambda.Function("athena.mysql.connector", {
284 | name: lambdaFunctionName,
285 | handler: "com.amazonaws.athena.connectors.mysql.MySqlMuxCompositeHandler",
286 | runtime: "java11",
287 | role: athenaLambdaRole.arn,
288 | s3Bucket: "awsserverlessrepo-changesets-1f9ifp952i9h0",
289 | s3Key: "577407151357/arn:aws:serverlessrepo:us-east-1:292517598671:applications-AthenaMySQLConnector-versions-2022.42.2/b7e4dd5b-a49b-4769-a1fd-69beb31d0bfc",
290 | timeout: 900,
291 | memorySize: 3008,
292 | ephemeralStorage: {
293 | size: 512
294 | },
295 |
296 | vpcConfig: {
297 | securityGroupIds: mysql.vpcSecurityGroupIds,
298 | subnetIds: vpc.publicSubnetIds
299 | },
300 | packageType: "Zip",
301 | environment: {
302 | variables: variables
303 | }
304 | });
305 |
306 | // Ensure that Athena can invoke the mysql connector.
307 | const allowLambdaInvoke = new aws.iam.RolePolicy("athena.lambda.invoke", {
308 | role: athenaRole,
309 | policy: pulumi.all([mysqlFunction.arn]).apply(([arn]) => JSON.stringify({
310 | Version: "2012-10-17",
311 | Statement: [{
312 | Action: ["lambda:InvokeFunction"],
313 | Effect: "Allow",
314 | Resource: arn,
315 | }],
316 | })),
317 | });
318 |
319 | // Register the mysql connector lambda in the Athena catalog.
320 | const mysqlCatalog = new aws.athena.DataCatalog("athena.lambda.catalog", {
321 | name: mysqlFunction.name,
322 | description: "Mysql connection",
323 | parameters: {
324 | "metadata-function": mysqlFunction.arn,
325 | "record-function": mysqlFunction.arn,
326 | },
327 | type: "LAMBDA",
328 | });
329 |
330 | // Create a role that gives Snowflake access to our rest api.
331 | const snowflakeExternalFunctionInvocationRole = new aws.iam.Role("rest.snowflakeInvocationRole", {
332 | name: functionInvocationRoleName,
333 | assumeRolePolicy: pulumi.all([snowflakeApiIntegration.apiAwsIamUserArn, snowflakeApiIntegration.apiAwsExternalId]).apply(([role, externalId]) => JSON.stringify({
334 | Version: "2012-10-17",
335 | Statement: [{
336 | "Effect": "Allow",
337 | "Principal": {
338 | "AWS": role
339 | },
340 | "Action": "sts:AssumeRole",
341 | "Condition": {
342 | "StringEquals": {
343 | "sts:ExternalId": externalId
344 | }
345 | }
346 | }],
347 | }))
348 | }, {dependsOn: snowflakeApiIntegration});
349 |
350 | // The function that will query Athena
351 | const athenaExternalFunction = new GenericSnowflake("snowflake.athenaExternalFunction", {
352 | type: "EXTERNAL FUNCTION",
353 | name: "ATHENA_EXTERNAL_FUNCTION",
354 | database: db.name,
355 | schema: schema.name,
356 | args: [
357 | {name: "mode", type: "string"},
358 | {name: "sql", type: "string"},
359 | {name: "execution_id", type: "string"},
360 | {name: "starting_token", type: "string"},
361 | {name: "max_results_per_page", type: "integer"}
362 | ],
363 | theRest: pulumi.interpolate `
364 | returns variant
365 | API_INTEGRATION = "${snowflakeApiIntegration.name}"
366 | REQUEST_TRANSLATOR = "${requestTranslator.name}"
367 | RESPONSE_TRANSLATOR = "${responseTranslator.name}"
368 | CONTEXT_HEADERS = (CURRENT_TIMESTAMP)
369 | MAX_BATCH_ROWS = 1
370 | as 'https://${restApi.id}.execute-api.${currentRegion}.amazonaws.com/prod/athena';
371 | `
372 | }, {deleteBeforeReplace: true, replaceOnChanges: ["*"]});
373 |
374 | const queryFunction = new GenericSnowflake("snowflake.athenaQueryUDTF", {
375 | type: "FUNCTION",
376 | name: "QUERY_ATHENA",
377 | database: db.name,
378 | schema: schema.name,
379 | args: [
380 | {name: "sql", type: "string"},
381 | {name: "max_results_per_page", type: "integer"}
382 | ],
383 | theRest: pulumi.interpolate `returns table(data object) as $$
384 | ${file('snowflake/table_function_body.sql')}
385 | $$;`
386 | }, {
387 | dependsOn: [athenaExternalFunction],
388 | deleteBeforeReplace: true,
389 | replaceOnChanges: ["*"]
390 | });
391 |
392 | const apiPolicy = new aws.apigateway.RestApiPolicy("rest.snowflakePolicy", {
393 | restApiId: restApi.id,
394 | policy: pulumi.all([currentAccount, restApi.id, currentRegion, snowflakeExternalFunctionInvocationRole.name]).apply(([accountId, apiGatewayId, currentRegion, invocationRole]) => JSON.stringify({
395 | Version: "2012-10-17",
396 | Statement: [{
397 | "Effect": "Allow",
398 | "Principal": {
399 | "AWS": `arn:aws:sts::${accountId}:assumed-role/${invocationRole}/snowflake`
400 | },
401 | "Action": "execute-api:Invoke",
402 | "Resource": `arn:aws:execute-api:${currentRegion}:${accountId}:${apiGatewayId}/*`
403 | }]
404 | }))
405 | }, {dependsOn: [mysqlFunction /** add lambda wait here to minimize race problems **/]});
406 |
407 | // deploy the rest api.
408 | const apiDeployment = new aws.apigateway.Deployment("rest.deployment", {
409 | restApi: restApi.id,
410 | triggers: {
411 | redeployment: restApi.body.apply(body => JSON.stringify(body)).apply(toJSON => crypto.createHash('sha1').update(String(toJSON)).digest('hex')),
412 | },
413 | }, {dependsOn: [apiPolicy, postMethod200Response, athenaPostIntegrationResponse]});
414 |
415 | // define a stage to deploy to.
416 | const prodStage :aws.apigateway.Stage = new aws.apigateway.Stage("rest.prodStage", {
417 | deployment: apiDeployment.id,
418 | restApi: restApi.id,
419 | stageName: "prod"
420 | }, {dependsOn: [apiPolicy]});
421 |
422 | // internal function to read in as a string a file (used for snowflake object imports)
423 | function file(fileName: string): string {
424 | return fs.readFileSync(fileName, 'utf8');
425 | }
426 |
--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
1 | {
2 | "name": "athena",
3 | "main": "index.ts",
4 | "devDependencies": {
5 | "@types/node": "^14"
6 | },
7 | "dependencies": {
8 | "@pulumi/aws": "^5.0.0",
9 | "@pulumi/aws-apigateway": "^0.0.11",
10 | "@pulumi/aws-native": "^0.38.0",
11 | "@pulumi/awsx": "^0.40.1",
12 | "@pulumi/pulumi": "^3.0.0",
13 | "@pulumi/random": "^4.8.2",
14 | "@pulumi/snowflake": "^0.14.0",
15 | "@types/snowflake-sdk": "^1.6.8",
16 | "snowflake-promise": "^4.5.0",
17 | "snowflake-sdk": "^1.6.14"
18 | }
19 | }
20 |
--------------------------------------------------------------------------------
/snowflake/SnowflakeGenericProvider.ts:
--------------------------------------------------------------------------------
1 | import * as pulumi from "@pulumi/pulumi";
2 | import {ID} from "@pulumi/pulumi/resource";
3 | import { Snowflake } from 'snowflake-promise';
4 |
5 |
6 | export interface SnowflakeResourceInputs {
7 | database: pulumi.Input;
8 | schema: pulumi.Input;
9 | name: pulumi.Input;
10 | type: pulumi.Input;
11 | args: pulumi.Input;
12 | theRest: pulumi.Input;
13 | }
14 |
15 | export interface FunctionArgumentInputs {
16 | name: pulumi.Input,
17 | type: pulumi.Input
18 | }
19 |
20 | interface FunctionArgument {
21 | name: string,
22 | type: string
23 | }
24 |
25 | interface SnowflakeInputs {
26 | database: string;
27 | schema: string;
28 | name: string;
29 | type: "FUNCTION" | "EXTERNAL FUNCTION";
30 | args: FunctionArgument[];
31 | theRest: string;
32 | }
33 |
34 | function createArgString(inputs: SnowflakeInputs ){
35 | return inputs.args.map(f => `${f.name} ${f.type}`).join(', ');
36 | }
37 |
38 | function dropArgString(inputs: SnowflakeInputs ){
39 | return inputs.args.map(f => f.type).join(', ');
40 | }
41 |
42 | function getId(inputs: SnowflakeInputs){
43 | return `"${inputs.database}"."${inputs.schema}"."${inputs.name}"`
44 | }
45 |
46 | class SnowflakeProvider implements pulumi.dynamic.ResourceProvider {
47 | connection: Snowflake | undefined = undefined;
48 | connected: boolean = false;
49 |
50 | async create(inputs: SnowflakeInputs) {
51 | await this.connectIfNotConnected();
52 | await runsql(this.connection, inputs.database, inputs.schema, `CREATE ${inputs.type} ${getId(inputs)}(${createArgString(inputs)}) ${inputs.theRest}`);
53 | const output = { id: getId(inputs) , outs: {database: inputs.database, schema: inputs.schema, name: inputs.name, type: inputs.type, theRest: inputs.theRest, args: inputs.args}};
54 | pulumi.log.debug(JSON.stringify(output));
55 | return output;
56 | }
57 |
58 | async connectIfNotConnected() {
59 | if(!this.connected) {
60 | pulumi.log.debug("Connecting.");
61 | const config = new pulumi.Config("snowflake");
62 | const account = config.require("account");
63 | const username = config.require("username");
64 | this.connection = new Snowflake({
65 | account: account,
66 | username: username,
67 | authenticator: "EXTERNALBROWSER"
68 | });
69 | await this.connection.connectAsync();
70 | pulumi.log.debug("Connected.");
71 | this.connected = true;
72 | }
73 | }
74 |
75 | async delete(id: ID, inputs: SnowflakeInputs) {
76 | await this.connectIfNotConnected();
77 | pulumi.log.debug(`database: ${inputs.database} schema: ${inputs.schema}, args: ${(JSON.stringify(inputs.args))}, name: ${inputs.name}`);
78 | await runsql(this.connection, inputs.database, inputs.schema, `DROP FUNCTION ${getId(inputs)}(${dropArgString(inputs)}) `);
79 | }
80 |
81 | }
82 |
83 | const snowflakeGenericProvider= new SnowflakeProvider();
84 |
85 | interface SnowflakeConfig {
86 | account: string;
87 | username: string;
88 | }
89 |
90 | export class GenericSnowflake extends pulumi.dynamic.Resource {
91 | constructor(name: string, args: SnowflakeResourceInputs, opts?: pulumi.CustomResourceOptions) {
92 | super(snowflakeGenericProvider, name, args, opts);
93 | }
94 | }
95 |
96 | async function runsql(connection: Snowflake | undefined, database: string, schema: string, sql: string) {
97 | pulumi.log.debug("runsql: " + sql );
98 | await connection?.execute(`USE "${database}"."${schema}"`);
99 | return connection?.execute(sql);
100 | }
101 |
102 |
103 |
104 |
105 |
--------------------------------------------------------------------------------
/snowflake/request_translator.js:
--------------------------------------------------------------------------------
1 |
2 | function translate_request(EVENT) {
3 | if(!EVENT.body.data[0][1]) {
4 | throw new Error("Mode must be provided.");
5 | }
6 | let row = EVENT.body.data[0][0];
7 | let mode = EVENT.body.data[0][1].toLowerCase();
8 | let sql = EVENT.body.data[0][2];
9 | let execution_id = EVENT.body.data[0][3];
10 | let starting_token = EVENT.body.data[0][4];
11 | let max_results_per_page = EVENT.body.data[0][5];
12 |
13 | switch(mode) {
14 |
15 | case "submit":
16 | if(!sql || execution_id || starting_token) {
17 | throw new Error("A non-null SQL argument must be passed for Submission.");
18 | }
19 | return {
20 | "translatorData": {"mode" : mode},
21 | "urlSuffix" : "?action=AmazonAthena.StartQueryExecution",
22 | "body": { "QueryString": sql,
23 | "ClientRequestToken": EVENT.contextHeaders["sf-context-current-timestamp"] + "xxxxxxxxxxxxxxxx",
24 | "ResultConfiguration": {"OutputLocation": "s3://INSERTBUCKETNAMEHERE/"}
25 | },
26 | };
27 | case "pending":
28 | if(sql || !execution_id || starting_token) {
29 | throw new Error("Only execution id should be passed for pending." + sql + " " + execution_id + " " + starting_token);
30 | }
31 | return {
32 | "urlSuffix" : "?action=AmazonAthena.GetQueryExecution",
33 | "body": {"QueryExecutionId": execution_id},
34 | "translatorData": {"mode" : mode, "execution_id": execution_id},
35 | };
36 | case "first_page":
37 | if(sql || !execution_id || starting_token) {
38 | throw new Error("First page should have execution id but no sql or starting token.");
39 | }
40 | return {
41 | "urlSuffix" : "?action=AmazonAthena.GetQueryResults",
42 | "translatorData": {"mode" : mode, "execution_id": execution_id},
43 | "body": {
44 | "QueryExecutionId": execution_id,
45 | "MaxResults": max_results_per_page
46 | }};
47 |
48 | case "subsequent_page":
49 | if(sql || !execution_id || !starting_token) {
50 | throw new Error("Next page should have execution id and starting token but no sql.");
51 | }
52 | return {
53 | "urlSuffix" : "?action=AmazonAthena.GetQueryResults",
54 | "translatorData": {"mode" : mode, "execution_id": execution_id},
55 | "body": {
56 | "QueryExecutionId": execution_id,
57 | "MaxResults": max_results_per_page,
58 | "NextToken": starting_token
59 | },
60 | };
61 |
62 | default:
63 | throw new Error("Unknown mode submitted.");
64 | }
65 | }
66 |
--------------------------------------------------------------------------------
/snowflake/response_translator.js:
--------------------------------------------------------------------------------
1 |
2 | function translate_response(EVENT) {
3 | try {
4 | let mode = EVENT.translatorData.mode;
5 | switch(mode) {
6 | case "submit":
7 | return {
8 | "body": { data: [[0, {execution_id: EVENT.body.QueryExecutionId, mode: "pending"}]]}
9 | }
10 | case "pending":
11 | switch(EVENT.body.QueryExecution.Status.State) {
12 | case "SUCCEEDED":
13 | return {
14 | "body": { data: [[0, {execution_id: EVENT.translatorData.execution_id, mode: "first_page"}]]}
15 | }
16 | case "FAILED":
17 | throw new Error(EVENT.body.QueryExecution.Status.StateChangeReason);
18 | }
19 | // let us try again. ideally we would use await here but it is not clear on how to do this inside of snowflake.
20 | //await new Promise(r => setTimeout(r, 75));
21 | return {
22 | "body": { data: [[0, {execution_id: EVENT.translatorData.execution_id, mode: "pending"}]]}
23 | }
24 | case "first_page":
25 | case "subsequent_page":
26 | const body = EVENT.body;
27 | let records = new Array();
28 | let columns = body.ResultSet.ColumnInfos;
29 | for (let i = mode == "subsequent_page" ? 0 : 1; i < body.ResultSet.Rows.length; i++) {
30 | let row = body.ResultSet.Rows[i].Data;
31 | let o = new Object();
32 | for(let h = 0; h < columns.length; h++) {
33 | let name = columns[h].Name;
34 | let value = row[h].VarCharValue;
35 | switch(columns[h].Type) {
36 | case "boolean":
37 | value = Boolean(value);
38 | break;
39 | case "tinyint":
40 | case "smallint":
41 | case "integer":
42 | value = parseInt(value);
43 | break;
44 | }
45 |
46 | o[name] = value;
47 | }
48 |
49 | records.push(o);
50 | }
51 | let data = {
52 | mode: "subsequent_page",
53 | execution_id: EVENT.translatorData.execution_id,
54 | next: body.NextToken,
55 | data: records
56 | };
57 | return {
58 | "body": { data: [[0, data]]}
59 | };
60 | default:
61 | return {
62 | "body": { data: [[0, EVENT.body]] }
63 | }
64 | }
65 | } catch(err) {
66 | //throw new Error(err.message + JSON.stringify(EVENT.body))
67 | throw new Error(err.message) ;
68 | }
69 | }
70 |
--------------------------------------------------------------------------------
/snowflake/table_function_body.sql:
--------------------------------------------------------------------------------
1 | SELECT f1.value::object FROM (
2 | WITH paginated(response, data)
3 | AS (
4 | SELECT
5 | object_construct('sql', sql, 'mode', 'submit')::variant,
6 | cast(null as variant)
7 | UNION ALL
8 | SELECT
9 | athena_external_function(response:mode::text, response:sql::text, response:execution_id::text, response:next::text, max_results_per_page) as tx,
10 | tx:data
11 | FROM paginated
12 | where response:mode::text in ('pending', 'submit', 'first_page') OR response:next::text is not null
13 | )
14 | SELECT
15 | data
16 | FROM
17 | paginated
18 | WHERE data is not null) f0,
19 | LATERAL FLATTEN(input => f0.data) f1
20 |
--------------------------------------------------------------------------------
/tsconfig.json:
--------------------------------------------------------------------------------
1 | {
2 | "compilerOptions": {
3 | "strict": true,
4 | "outDir": "bin",
5 | "target": "es2016",
6 | "module": "commonjs",
7 | "moduleResolution": "node",
8 | "sourceMap": true,
9 | "experimentalDecorators": true,
10 | "pretty": true,
11 | "noFallthroughCasesInSwitch": true,
12 | "noImplicitReturns": true,
13 | "forceConsistentCasingInFileNames": true
14 | },
15 | "files": [
16 | "index.ts"
17 | ]
18 | }
19 |
--------------------------------------------------------------------------------