Athena |BEST| Download Results As Csv

Amazon Athena automatically stores query results and metadata information for each query that runs in a query result location that you can specify in Amazon S3. If necessary, you can access the files in this location to work with them. You can also download query result files directly from the Athena console.

IAM principals with permission to the Amazon S3 GetObject action for the query result location are able to retrieve query results from Amazon S3 even if permission to the Athena GetQueryResults action is denied.

Athena Download Results As Csv

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(Optional) Choose View lifecycle configuration to view and configure the Amazon S3 lifecycle rules on your query results bucket. The Amazon S3 lifecycle rules that you create can be either expiration rules or transition rules. Expiration rules automatically delete query results after a certain amount of time. Transition rules move them to another Amazon S3 storage tier. For more information, see Setting lifecycle configuration on a bucket in the Amazon Simple Storage Service User Guide.

The expected bucket owner setting applies only to the Amazon S3 output location that you specify for Athena query results. It does not apply to other Amazon S3 locations like data source locations in external Amazon S3 buckets, CTAS and INSERT INTO destination table locations, UNLOAD statement output locations, operations to spill buckets for federated queries, or SELECT queries run against a table in another account.

(Optional) Choose Assign bucket owner full control over query results to grant full control access over query results to the bucket owner when ACLs are enabled for the query result bucket. For example, if your query result location is owned by another account, you can grant ownership and full control over your query results to the other account. For more information, see Controlling ownership of objects and disabling ACLs for your bucket in the Amazon S3 User Guide.

Previously in Athena, if you ran a query without specifying a value for Query result location, and the query result location setting was not overridden by a workgroup, Athena created a default location for you. The default location was aws-athena-query-results-MyAcctID-MyRegion, where MyAcctID was the Amazon Web Services account ID of the IAM principal that ran the query, and MyRegion was the region where the query ran (for example, us-west-1.)

Now, before you can run an Athena query in a region in which your account hasn't used Athena previously, you must specify a query result location, or use a workgroup that overrides the query result location setting. While Athena no longer creates a default query results location for you, previously created default aws-athena-query-results-MyAcctID-MyRegion locations remain valid and you can continue to use them.

When using the AWS CLI, specify the query result location using the OutputLocation parameter of the --configuration option when you run the aws athena create-work-group or aws athena update-work-group command.

If the bucket's S3 Object Ownership setting is Bucket owner preferred, the bucket owner also owns all query result objects written from this workgroup. For example, if an external account's workgroup enables this option and sets its query result location to your account's Amazon S3 bucket which has an S3 Object Ownership setting of Bucket owner preferred, you own and have full control access over the external workgroup's query results.

Athena query result files are data files that contain information that can be configured by individual users. Some programs that read and analyze this data can potentially interpret some of the data as commands (CSV injection). For this reason, when you import query results CSV data to a spreadsheet program, that program might warn you about security concerns. To keep your system secure, you should always choose to disable links or macros from downloaded query results.

You cannot use the Download results option to retrieve query results that have been deleted manually, or retrieve query results that have been deleted or moved to another location by Amazon S3 lifecycle rules.

You can use the Recent queries tab of the Athena console to export one or more recent queries to a CSV file in order to view them in tabular format. The downloaded file contains not the query results, but the SQL query string itself and other information about the query. Exported fields include the execution ID, query string contents, query start time, status, run time, amount of data scanned, query engine version used, and encryption method. You can export a maximum of 500 recent queries, or a filtered maximum of 500 queries using criteria that you enter in the search box.

Query output files are stored in sub-folders on Amazon S3 in the following path pattern unless the query occurs in a workgroup whose configuration overrides client-side settings. When workgroup configuration overrides client-side settings, the query uses the results path specified by the workgroup.

The following sub-folders are created only for queries run from the console whose results path has not been overriden by workgroup configuration. Queries that run from the AWS CLI or using the Athena API are saved directly to the QueryResultsLocationInS3.

You can download results files from the console from the Results pane when using the console or from the query History. For more information, see Downloading query results files using the Athena console.

DML and DDL query metadata files are saved in binary format and are not human readable. The file extension corresponds to the related query results file. Athena uses the metadata when reading query results using the GetQueryResults action. Although these files can be deleted, we do not recommend it because important information about the query is lost.

To use the AWS CLI to identify the query output location and result files, run the aws athena get-query-execution command, as in the following example. Replace abc1234d-5efg-67hi-jklm-89n0op12qr34 with the query ID.

I am creating a Data Lake and have some tables in Glue Catalog that I need to query in Athena. As a prerequisite, Athena requires us to store the query results in a S3 bucket. I have "Temp" and "Logs" S3 buckets. But since this is client sensitive data, I just want to check should I create a new Athena bucket for this or use the existing temp/logs bucket.

You could create a bucket that only permits Write access -- that is, put a Deny policy on it so that nobody can GetObject from the bucket. That way, Athena is happy to write its output, but people can't see the results.

And I'm having limitations with Athena since max results I can get from athena is 1000 and I need to implement pagination. And most of the queries going to be have more than 150k results.. so paginations gonna take alot time and I feels like its a hectic process as well.

Each time you run a query against Athena using the aws CLI tool, 2 files are created in the query results location. Over time this location is going to contain a LOT of files unless they're cleaned up.

Is there a way to automatically clean them up? If not, what's the best approach? The delete-named-query CLI command only works if the query is named so it doesn't look like you can use that to clean up your results when you're finished with them.

Following up on my last blog post (Using Parquet on Athena to Save Money on AWS), I wanted to share another thought about AWS Athena, specifically how the S3 bucket is being used by Athena to store query results.

On the first use of Amazon Athena, AWS will automatically create a new bucket to store the query results (bucket name aws-athena-query-results--). Athena will store a raw result file (QueryId.csv) and a metadata file (QueryId.csv.metadata).

The s3 bucket holding Athena query results is rightly getting updated with the results every time I perform a "Run" operation from retool App. Running the same query in Athena console takes 18 seconds odd to show the results and as the next step, my plan is to add partitions and reduce the query time for the select operation.

Can you also share a little more about what you mean when you say: "The s3 bucket holding Athena query results is rightly getting updated with the results every time I perform a "Run" operation from retool App."?

You can now accelerate repeat queries in Amazon Athena with Query Result Reuse, a new caching feature released today. Repeat queries are SQL queries submitted within a short period of time and produce the same results as one or more previously run queries. In use cases like business intelligence, where interactive analysis in a dashboard can cause multiple identical queries to be run, repeat queries can increase time to insight as each query needs time to read and process data before returning results to the user.

Streams the results of a single query execution specified by QueryExecutionId from the Athena query results location in Amazon S3. For more information, see Working with query results, recent queries, and output files in the Amazon Athena User Guide . This request does not execute the query but returns results. Use StartQueryExecution to run a query. e24fc04721