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I am playing around with Iceberg table and inserted just 6 records partitioned on a long type column. Although I have executed update commands, I can see there are more than 10 data files in the data folder. I tried running rewrite_data_file procedure

CALL catalog.system.rewrite_data_files(table => 'db.iceberg',
                                                            options => map(
                                                            'max-concurrent-file-group-rewrites','50',
                                                            'max-file-size-bytes','104857600000',
                                                            'min-file-size-bytes','10480',
                                                            'target-file-size-bytes','134217728',
                                                            'min-input-files', '2'))

still the files on s3 does not change. I can see two folder for the same partitioned column

I tried setting the table property on Merge-On-Read and setting max target file size.

ALTER table catalog.db.iceberg SET TBLPROPERTIES ('write.delete.mode' = 'merge-on-read',
'delete.isolation-level' = 'snapshot', 'write.target-file-size-bytes'  = '134217728')

The contents in the table are below, table is partitioned on age column :

Ideally there must be 6 folders in the data layer, as per the partitioned column cardinality. Not sure what's not adding up here. Can someone help please?

本文标签： amazon s3Rewritedatafiles procedure is not working as intendedStack Overflow

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