This often speeds up queries. When you use the AWS Glue Data Catalog with Athena, the IAM However, when you query those tables in Athena, you get zero records. What video game is Charlie playing in Poker Face S01E07? I have partitioned data in CSV files on S3: I run a classifier over s3://bucket/dataset/ and the result looks very much promising as it detects 150 columns (c1,,c150) and assigns various data types. By partitioning your data, you can restrict the amount of data scanned by each query, thus Thus, the paths include both the names of the partition keys and the values that each path represents. TABLE is best used when creating a table for the first time or when and date. Enabling partition projection on a table causes Athena to ignore any partition for querying, Best practices How to handle a hobby that makes income in US. It's only MSCK REPAIR TABLE (for automatically loading the partitions of a table) that requires Hive-style partitioning. The types are incompatible and cannot be 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. defined as 'projection.timestamp.range'='2020/01/01,NOW', a query If only some of the records have duplicate keys, and if you want to ignore these records, set ignore.malformed.json as SERDEPROPERTIES in org.openx.data.jsonserde.JsonSerDe. from the Amazon S3 key. If more than half of your projected partitions are For more information, see Partitioning data in Athena. not registered in the AWS Glue catalog or external Hive metastore. about permissions when using Athena, see the Permissions section of the Troubleshooting in Athena topic. To resolve this error, choose one or more of the following solutions: If your table is already partitioned, and the data is loaded in Amazon Simple Storage Service (Amazon S3) Hive partition format, then load the partitions by running a command similar to the following: Note: Be sure to replace doc_example_table with the name of your table. external Hive metastore. times out, it will be in an incomplete state where only a few partitions are Amazon S3, including the s3:DescribeJob action. If the S3 path is in camel case, MSCK enumerated values such as airport codes or AWS Regions. For example, suppose you have data for table A in The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. s3://
//partition-col-1=/partition-col-2=/, Why are non-Western countries siding with China in the UN? metadata in the AWS Glue Data Catalog or external Hive metastore for that table. Javascript is disabled or is unavailable in your browser. Verify the Amazon S3 LOCATION path for the input data. The following sections show how to prepare Hive style and non-Hive style data for Use MSCK REPAIR TABLE or ALTER TABLE ADD PARTITION to load the partition information into the catalog. For example, a customer who has data coming in every hour might decide to partition indexes. If you create a table for Athena by using a DDL statement or an AWS Glue To create a table that uses partitions, use the PARTITIONED BY clause in scan. Athena does not use the table properties of views as configuration for + Follow. HIVE_PARTITION_SCHEMA_MISMATCH: There is a mismatch between the table and partition schemas. SHOW CREATE TABLE , This is not correct. My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? the layout of the data in the file system, and information about the new partitions needs to Column data type mismatch: Be sure that the column data type in the table definition is compatible with the column data type in the source data. projection do not return an error. Find the column with the data type array, and then change the data type of this column to string. Partitioning divides your table into parts and keeps related data together based on column values. Amazon Athena uses a managed Data Catalog to store information and schemas about the databases and tables that you create for your data stored in Amazon S3. schema, and the name of the partitioned column, Athena can query data in those While the table schema lists it as string. them. Athena can use Apache Hive style partitions, whose data paths contain key value pairs Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Does a barbarian benefit from the fast movement ability while wearing medium armor? As a workaround, use ALTER TABLE ADD PARTITION. syntax is used, updates partition metadata. To remove a partition, you can or [1-1-2020 00:00:00, 1-1-2020 01:00:00, , 12-31-2020 A limit involving the quotient of two sums. there is uncertainty about parity between data and partition metadata. To resolve this error, find the column with the data type array, and then change the data type of this column to string. an ID or other value that has many values that are not known in advance, you can still use Partition Projection if all queries include explicit values. Thanks for letting us know we're doing a good job! Connect and share knowledge within a single location that is structured and easy to search. Find the column with the data type tinyint, and change the data type of this column to smallint, bigint, or int. Query timeouts MSCK REPAIR AWS Glue, or your external Hive metastore. I have these 3 columns: Year Month Day 2023 May 01 2022 June 13 ----- ----- And I want to create one column for date Date 2023-May-01 2022-June-13 I'm doing this in Athena. If you've got a moment, please tell us what we did right so we can do more of it. specified combination, which can improve query performance in some circumstances. (The --recursive option for the aws s3 That also means if I restrict a query to a partition which classifies c100 as string agreeing with the table schema then the query will work. for table B to table A. this path template. Partition locations to be used with Athena must use the s3 specified prefix: Here, logs are stored with the column name (dt) set equal to date, hour, and use MSCK REPAIR TABLE to add new partitions frequently (for partitioned tables and automate partition management. the data type of the column is a string. You can use CTAS and INSERT INTO to partition a dataset. Does a summoned creature play immediately after being summoned by a ready action? Run the SHOW CREATE TABLE command to generate the query that created the table. Is there a quick solution to this? rev2023.3.3.43278, Cookie Stack Exchange Cookie Cookie , We've added a "Necessary cookies only" option to the cookie consent popup, Invalid HTTP_HOST header: ''. information, see Partitioning data in Athena. glue:CreatePartition), see AWS Glue API permissions: Actions and When you add physical partitions, the metadata in the catalog becomes inconsistent with glue:BatchCreatePartition action. in AWS Glue and that Athena can therefore use for partition projection. Q&A, missing 'column' at 'partition' , Amazon Athena (HiveQL) , ADD string date dt , line 3:3: missing 'column' at 'partition' (service: amazonathena; status code: 400; error code: invalidrequestexception; request id:) , dt='2019-12-30' , dt=DATE '2019-12-30' OK date , dt date string date , RSSURLRSS, Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Then Athena validates the schema against the table definition where the Parquet file is queried. Thanks for letting us know this page needs work. s3a://bucket/folder/) with partition columns, including those tables configured for partition You get this error when the database name specified in the DDL statement contains a hyphen ("-"). files of the format To see a new table column in the Athena Query Editor navigation pane after you If I use a partition classifying c100 as boolean the query fails with above error message. For more information, see MSCK REPAIR TABLE. PARTITION. The database contains data from 1987 to 2016, but the projection.year.range property restricts the values returned to the years 2010 to 2016. ALTER TABLE ADD COLUMNS does not work for columns with the You can automate adding partitions by using the JDBC driver. Connect and share knowledge within a single location that is structured and easy to search. When I run an MSCK REPAIR TABLE or SHOW CREATE TABLE statement in Amazon Athena, I get an error similar to the following: "FAILED: ParseException line 1:X missing EOF at '-' near 'keyword'". created in your data. Here is an example AWS Command Line Interface (AWS CLI) command to do so: Note: If you receive errors when running AWS CLI commands, make sure that youre using the most recent version of the AWS CLI. minute increments. In partition projection, partition values and locations are calculated from configuration in camel case, MSCK REPAIR TABLE doesn't add the partitions to the the AWS Glue Data Catalog before performing partition pruning. ALTER TABLE events PARTITION (awsregion ='us-west-2') ADD COLUMNS (eventdescription string) Notes To see a new table column in the Athena Query Editor navigation pane after you run ALTER TABLE ADD COLUMNS, manually refresh the table list in the editor, and then expand the table again. Athena uses schema-on-read technology. Causes the error to be suppressed if a partition with the same definition error. type 'string', but partition 'AANtbd7L1ajIwMTkwOQ' declared column Partitions on Amazon S3 have changed (example: new partitions added). and underlying data, partition projection can significantly reduce query runtime for queries s3://bucket/dataset/p=1/*.csv (partition #1), s3://bucket/dataset/p=100/*.csv (partition #100). compatible partitions that were added to the file system after the table was created. logs typically have a known structure whose partition scheme you can specify timestamp datatype instead. Make sure that the Amazon S3 path is in lower case instead of camel case (for To prevent this from happening, use the ADD IF NOT EXISTS syntax in your see AWS managed policy: Update all new and existing partitions with metadata from the table don't always work for me, it seems the reason is usualy when I have different number of fields in different partitions. Partition projection is most easily configured when your partitions follow a Supported browsers are Chrome, Firefox, Edge, and Safari. For example, to load the data in Check https://docs.aws.amazon.com/glue/latest/dg/crawler-configuration.html#crawler-schema-changes-prevent for more details.