![]() ROW FORMAT DELIMITED FIELDS TERMINATED BY ',' If the data is located at the Amazon S3 paths that Athena expects, then repair the table by running a command similar to the following: CREATE EXTERNAL TABLE Employee ( s3://doc-example-bucket/athena/inputdata/year=2018/data.csv.s3://doc-example-bucket/athena/inputdata/year=2019/data.csv.s3://doc-example-bucket/athena/inputdata/year=2020/data.csv.For example, if you have a table that is partitioned on Year, then Athena expects to find the data at Amazon S3 paths similar to the following: MSCK REPAIR TABLE: If the partitions are stored in a format that Athena supports, run MSCK REPAIR TABLE to load a partition's metadata into the catalog. Use MSCK REPAIR TABLE or ALTER TABLE ADD PARTITION to load the partition information into the catalog. If your table has defined partitions, the partitions might not yet be loaded into the AWS Glue Data Catalog or the internal Athena data catalog. The data is parsed only when you run the query. Then, run a query similar to the following to update the location for your table table1: ALTER TABLE table1 SET LOCATION 's3://doc-example-bucket/table1' Partitions not yet loadedĪthena creates metadata only when a table is created. s3://doc-example-bucket/table2/table2.csv.s3://doc-example-bucket/table1/table1.csv.To resolve this issue, create individual S3 prefixes for each table similar to the following: However, when you query those tables in Athena, you get zero records.įor example, your Athena query returns zero records if your table location is similar to the following: Glue crawlers create separate tables for data that's stored in the same S3 prefix. Data for multiple tables stored in the same S3 prefix Note: If you receive errors when running AWS CLI commands, make sure that you’re using the most recent version of the AWS CLI. Here is an example AWS Command Line Interface (AWS CLI) command to do so: aws s3 cp s3://doc-example-bucket/myprefix//input// s3://doc-example-bucket/myprefix/input/ -recursive ![]() To resolve this issue, copy the files to a location that doesn't have double slashes. S3://doc-example-bucket/myprefix//input// ![]() For example, the following LOCATION path returns empty results: Double slash in LOCATION pathĪthena doesn't support table location paths that include a double slash (//). If the input LOCATION path is incorrect, then Athena returns zero records. Verify the Amazon S3 LOCATION path for the input data. If you're using a crawler, be sure that the crawler is pointing to the Amazon Simple Storage Service (Amazon S3) bucket rather than to a file. Here are some common reasons why the query might return zero records. ![]()
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