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the data is not partitioned, such queries may affect the GET If it doesn't then check other options at https://github.com/awsdocs/amazon-athena-user-guide/blob/master/doc_source/glue-best-practices.md#schema-syncing, For understanding issue in athena, check https://docs.aws.amazon.com/athena/latest/ug/updates-and-partitions.html. sources but that is loaded only once per day, might partition by a data source identifier your AWS Glue Data Catalog or Hive metastore, and your queries read only small parts of Check https://docs.aws.amazon.com/glue/latest/dg/crawler-configuration.html#crawler-schema-changes-prevent for more details. directory or prefix be listed.). Partition pruning gathers metadata and "prunes" it to only the partitions that apply buckets, use the AWS Glue Data Catalog with Athena, AWS managed policy: heavily partitioned tables, Considerations and How to solve this HIVE_PARTITION_SCHEMA_MISMATCH? Adds one or more columns to an existing table. Athena doesn't support table location paths that include a double slash (//). CreateTable API operation or the AWS::Glue::Table Here are some common reasons why the query might return zero records. Are there tables of wastage rates for different fruit and veg? Scenarios in which partition projection is useful include the following: Queries against a highly partitioned table do not complete as quickly as you Make sure that the role has a policy with sufficient permissions to access How to create AWS Athena partition via AWS SDK If the S3 path is The following example query uses SELECT DISTINCT to return the unique values from the year column. ranges that can be used as new data arrives. Creates one or more partition columns for the table. Use the MSCK REPAIR TABLE command to update the metadata in the catalog after Data Analyst to Data Scientist - Skillsoft s3://table-b-data instead. you can query the data in the new partitions from Athena. If you create a table for Athena by using a DDL statement or an AWS Glue