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  1. Ignite
  2. IGNITE-18437

Sql. Fix row count estimate by limit with offset

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Details

    • Bug
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 3.0.0-beta1
    • None
    • sql

    Description

      This issue was already fixed in ai-2 (IGNITE-18363), need to adopt it a bit.

       

      Limit with offset can return negative estimated rows count, this will throw an assertion error if limit is used as input of another relational operator.

      For example:

      CREATE TABLE t(id INT);
      INSERT INTO t VALUES (1), (2), (3);
      SELECT (SELECT id FROM t ORDER BY id LIMIT 1 OFFSET 10); 

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              zstan Evgeny Stanilovsky
              zstan Evgeny Stanilovsky
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