v.21.7Improvement
Enable Reading of Subcolumns for Distributed Tables
Enable reading of subcolumns (e.g. components of Tuples) for distributed tables. #24472 (Anton Popov).
Why it matters
This feature addresses the limitation in distributed tables where accessing specific components of tuple columns (subcolumns) was not supported. It allows users to efficiently select and query individual parts of complex tuple columns remotely, improving flexibility and reducing data transfer.How to use it
Users can directly reference tuple components in theirSELECT queries on distributed tables using the standard tuple syntax, for example: SELECT tuple_column.1 FROM distributed_table. No special configuration is needed to enable this functionality.