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  1. Hive
  2. HIVE-25406

Fetch writeId from insert-only transactional tables

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      Description

      When generating plan for incremental materialized view rebuild a filter operator is inserted on top of each source table scans. The predicates contain a filter for writeId since we want to get all the rows inserted/deleted from the source tables since the last rebuild only.

      WriteId is part of the ROW_ID virtual column and only available for fully-ACID ORC tables.

      The goal of this jira is to populate a writeId when fetching from insert-only transactional tables.

      create table t1(a int, b int) clustered by (a) into 2 buckets stored as orc TBLPROPERTIES ('transactional'='true', 'transactional_properties'='insert_only');
      
      ...
      
      SELECT t1.ROW__ID.writeId, a, b FROM t1;
      

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              • Assignee:
                kkasa Krisztian Kasa
                Reporter:
                kkasa Krisztian Kasa
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