feat(clickhouse-driver): Add support for S3 Bucket with paths

Author: KSDaemon

.github/workflows/drivers-tests.yml

@@ -215,6 +215,7 @@ jobs:
         athena-export-bucket-s3
         bigquery-export-bucket-gcs
         clickhouse-export-bucket-s3
+        clickhouse-export-bucket-s3-prefix
         databricks-jdbc
         databricks-jdbc-export-bucket-s3
         databricks-jdbc-export-bucket-s3-prefix
@@ -242,6 +243,7 @@ jobs:
           - bigquery-export-bucket-gcs
           - clickhouse
           - clickhouse-export-bucket-s3
+          - clickhouse-export-bucket-s3-prefix
           - databricks-jdbc
           - databricks-jdbc-export-bucket-s3
           - databricks-jdbc-export-bucket-s3-prefix

packages/cubejs-clickhouse-driver/src/ClickHouseDriver.ts

@@ -33,6 +33,8 @@ import sqlstring from 'sqlstring';
 
 import { transformRow, transformStreamRow } from './HydrationStream';
 
+const SUPPORTED_BUCKET_TYPES = ['s3'];
+
 const ClickhouseTypeToGeneric: Record<string, string> = {
   enum: 'text',
   string: 'text',
@@ -489,11 +491,9 @@ export class ClickHouseDriver extends BaseDriver implements DriverInterface {
   protected getExportBucket(
     dataSource: string,
   ): ClickhouseDriverExportAWS | null {
-    const supportedBucketTypes = ['s3'];
-
     const requiredExportBucket: ClickhouseDriverExportRequiredAWS = {
       bucketType: getEnv('dbExportBucketType', {
-        supported: supportedBucketTypes,
+        supported: SUPPORTED_BUCKET_TYPES,
         dataSource,
       }),
       bucketName: getEnv('dbExportBucket', { dataSource }),
@@ -507,9 +507,9 @@ export class ClickHouseDriver extends BaseDriver implements DriverInterface {
     };
 
     if (exportBucket.bucketType) {
-      if (!supportedBucketTypes.includes(exportBucket.bucketType)) {
+      if (!SUPPORTED_BUCKET_TYPES.includes(exportBucket.bucketType)) {
         throw new Error(
-          `Unsupported EXPORT_BUCKET_TYPE, supported: ${supportedBucketTypes.join(',')}`
+          `Unsupported EXPORT_BUCKET_TYPE, supported: ${SUPPORTED_BUCKET_TYPES.join(',')}`
         );
       }
 
@@ -529,11 +529,7 @@ export class ClickHouseDriver extends BaseDriver implements DriverInterface {
   }
 
   public async isUnloadSupported() {
-    if (this.config.exportBucket) {
-      return true;
-    }
-
-    return false;
+    return !!this.config.exportBucket;
   }
 
   /**
@@ -588,18 +584,32 @@ export class ClickHouseDriver extends BaseDriver implements DriverInterface {
     );
   }
 
-  public async unloadFromQuery(sql: string, params: unknown[], options: UnloadOptions): Promise<DownloadTableCSVData> {
+  /**
+   * Returns clean S3 bucket name and prefix path ending with / (if set)
+   */
+  private parseS3Path(input: string): { bucket: string; prefix: string | null } {
+    const trimmed = input.startsWith('s3://') ? input.slice(5) : input;
+    const parts = trimmed.split('/');
+    const bucket = parts[0];
+    const prefixParts = parts.slice(1);
+    const prefix = prefixParts.length > 0 ? `${prefixParts.join('/')}/` : null;
+
+    return { bucket, prefix };
+  }
+
+  public async unloadFromQuery(sql: string, params: unknown[], _options: UnloadOptions): Promise<DownloadTableCSVData> {
     if (!this.config.exportBucket) {
       throw new Error('Unload is not configured');
     }
 
     const types = await this.queryColumnTypes(`(${sql})`, params);
-    const exportPrefix = uuidv4();
+    const { bucket, prefix } = this.parseS3Path(this.config.exportBucket.bucketName);
+    const exportPrefix = prefix ? `${prefix}${uuidv4()}` : uuidv4();
 
     const formattedQuery = sqlstring.format(`
       INSERT INTO FUNCTION
          s3(
-             'https://${this.config.exportBucket.bucketName}.s3.${this.config.exportBucket.region}.amazonaws.com/${exportPrefix}/export.csv.gz',
+             'https://${bucket}.s3.${this.config.exportBucket.region}.amazonaws.com/${exportPrefix}/export.csv.gz',
              '${this.config.exportBucket.keyId}',
              '${this.config.exportBucket.secretKey}',
              'CSV'
@@ -617,7 +627,7 @@ export class ClickHouseDriver extends BaseDriver implements DriverInterface {
         },
         region: this.config.exportBucket.region,
       },
-      this.config.exportBucket.bucketName,
+      bucket,
       exportPrefix,
     );
 

packages/cubejs-testing-drivers/fixtures/clickhouse.json

@@ -10,6 +10,17 @@
           "CUBEJS_DB_EXPORT_BUCKET_AWS_REGION": "us-east-1"
         }
       }
+    },
+    "export-bucket-s3-prefix": {
+      "cube": {
+        "environment": {
+          "CUBEJS_DB_EXPORT_BUCKET_TYPE": "s3",
+          "CUBEJS_DB_EXPORT_BUCKET": "clickhouse-drivers-tests-preaggs/testing_prefix/for_export_buckets/",
+          "CUBEJS_DB_EXPORT_BUCKET_AWS_KEY": "${DRIVERS_TESTS_CUBEJS_DB_EXPORT_BUCKET_AWS_KEY}",
+          "CUBEJS_DB_EXPORT_BUCKET_AWS_SECRET": "${DRIVERS_TESTS_CUBEJS_DB_EXPORT_BUCKET_AWS_SECRET}",
+          "CUBEJS_DB_EXPORT_BUCKET_AWS_REGION": "us-east-1"
+        }
+      }
     }
   },
   "cube": {

packages/cubejs-testing-drivers/package.json

@@ -25,6 +25,7 @@
     "clickhouse-core": "yarn test-driver -i dist/test/clickhouse-core.test.js",
     "clickhouse-full": "yarn test-driver -i dist/test/clickhouse-full.test.js",
     "clickhouse-export-bucket-s3-full": "yarn test-driver -i dist/test/clickhouse-export-bucket-s3-full.test.js",
+    "clickhouse-export-bucket-s3-prefix-full": "yarn test-driver -i dist/test/clickhouse-export-bucket-s3-prefix-full.test.js",
     "databricks-jdbc-driver": "yarn test-driver -i dist/test/databricks-jdbc-driver.test.js",
     "databricks-jdbc-core": "yarn test-driver -i dist/test/databricks-jdbc-core.test.js",
     "databricks-jdbc-full": "yarn test-driver -i dist/test/databricks-jdbc-full.test.js",