Revert "feat(base-driver): add an option to skip connection test prob…

…es (#8833)" (#8846)

This reverts commit 1fd7a3e.

packages/cubejs-backend-shared/src/env.ts

@@ -479,17 +479,6 @@ const variables: Record<string, (...args: any) => any> = {
     return val;
   },
 
-  /**
-   * Flag to disable driver's test connection probes
-   */
-  dbDisableTestConnection: ({
-    dataSource
-  }: {
-    dataSource: string,
-  }) => (
-    !!process.env[keyByDataSource('CUBEJS_DB_DISABLE_TEST_CONNECTION', dataSource)]
-  ),
-
   /**
    * Database max pool size.
    */

packages/cubejs-base-driver/src/BaseDriver.ts

@@ -175,8 +175,6 @@ export abstract class BaseDriver implements DriverInterface {
 
   protected logger: any;
 
-  protected isTestConnectionDisabledFlag: boolean = false;
-
   /**
    * Class constructor.
    */
@@ -186,14 +184,8 @@ export abstract class BaseDriver implements DriverInterface {
      * request before determining it as not valid. Default - 10000 ms.
      */
     testConnectionTimeout?: number,
-
-    /**
-     * Flag for serverless DWHs to omit test connection probes.
-     */
-    isTestConnectionDisabled?: boolean,
   } = {}) {
     this.testConnectionTimeoutValue = _options.testConnectionTimeout || 10000;
-    this.isTestConnectionDisabledFlag = _options.isTestConnectionDisabled || false;
   }
 
   protected informationSchemaQuery() {
@@ -688,10 +680,6 @@ export abstract class BaseDriver implements DriverInterface {
     query.query = `SELECT * FROM (${query.query}) AS t LIMIT ${query.limit}`;
   }
 
-  public isTestConnectionDisabled(): boolean {
-    return !!this.isTestConnectionDisabledFlag;
-  }
-
   /**
    * Returns an array of signed AWS S3 URLs of the unloaded csv files.
    */