insert into partitioned table presto

Additionally, partition keys must be of type VARCHAR. Run Presto server as presto user in RPM init scripts. If you've got a moment, please tell us how we can make the documentation better. The combination of PrestoSql and the Hive Metastore enables access to tables stored on an object store. We're sorry we let you down. Fix race in queueing system which could cause queries to fail with Would you share the DDL and INSERT script? Sign in What does MSCK REPAIR TABLE do behind the scenes and why it's so slow? command like the following to list the partitions. The path of the data encodes the partitions and their values. A Presto Data Pipeline with S3 - Medium Create a simple table in JSON format with three rows and upload to your object store. You can create an empty UDP table and then insert data into it the usual way. Now, to insert the data into the new PostgreSQL table, run the following presto-cli command. Steps 24 are achieved with the following four SQL statements in Presto, where TBLNAME is a temporary name based on the input object name: 1> CREATE TABLE IF NOT EXISTS $TBLNAME (atime bigint, ctime bigint, dirid bigint, fileid decimal(20), filetype bigint, gid varchar, mode bigint, mtime bigint, nlink bigint, path varchar, size bigint, uid varchar, ds date) WITH (format='json', partitioned_by=ARRAY['ds'], external_location='s3a://joshuarobinson/pls/raw/$src/'); 2> CALL system.sync_partition_metadata(schema_name=>'default', table_name=>'$TBLNAME', mode=>'FULL'); 3> INSERT INTO pls.acadia SELECT * FROM $TBLNAME; The only query that takes a significant amount of time is the INSERT INTO, which actually does the work of parsing JSON and converting to the destination tables native format, Parquet. In building this pipeline, I will also highlight the important concepts of external tables, partitioned tables, and open data formats like Parquet. Managing large filesystems requires visibility for many purposes: tracking space usage trends to quantifying vulnerability radius after a security incident.

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