19 февр. 2021 г. · When you define a partition in a Redshift Spectrum (and Athena) external table the partition column becomes a separate column in your table.

8 нояб. 2017 г. · You can partition data in Redshift Spectrum by a key which is based on the source S3 folder where your Spectrum table sources its data.

29 авг. 2021 г. · When an External Table is created in Amazon Redshift Spectrum, it does not scan for existing partitions. Therefore, Redshift is not aware that they exist.

9 нояб. 2018 г. · The easiest way to do this would be to drop the table itself. As long as you have the DDL to recreate the table and don't mind dropping all ...

7 февр. 2023 г. · I have a partitioned location on S3 with data I want to read via Redshift External Table, which I create with the SQL statement CREATE EXTERNAL TABLE.

10 авг. 2021 г. · The way around this is to partition the data in S3 and to have a WHERE clause on the partition value. This will exclude files from needing to be read when they ...

13 июн. 2019 г. · Create separate tables for each column combinations you have and create a view (with union all ) on top them to display data.

28 мар. 2019 г. · If an external table is created with partitions unless one runs ALTER TABLE to add partitions, no data will be shown.

3 мая 2024 г. · is there any way how to select the last N (e.g. 3) S3 external table partitions dynamically and efficiently rather than using:

10 дек. 2020 г. · You then define your external table with PARTITION of YEAR and Spectrum can reduce the number of objects it needs to scan. – Bill Weiner.