You are viewing a plain text version of this content. The canonical link for it is here.

Posted to issues@calcite.apache.org by "Laurent Goujon (JIRA)" <ji...@apache.org> on 2018/08/16 15:38:00 UTC

[jira] [Created] (CALCITE-2471) RelNode description includes all tree when recomputed

Laurent Goujon created CALCITE-2471:
---------------------------------------

             Summary: RelNode description includes all tree when recomputed
                 Key: CALCITE-2471
                 URL: https://issues.apache.org/jira/browse/CALCITE-2471
             Project: Calcite
          Issue Type: Bug
          Components: core
            Reporter: Laurent Goujon
            Assignee: Julian Hyde


The initial AbstractRelNode description is `{{typeName#id}}` but when recomputed, it includes all its inputs (and other attributes).

When creating the final plan, HepPlanner visits each node bottom up, and recomputes the node digest. This causes node description to grow in size, up to the top node which contains basically a string copy of the whole tree. On large trees, this may consume a non-significant amount of memory.

See email thread: https://lists.apache.org/thread.html/5e71c9f2b4e83865805841708f53471cfab1b5de673e6f162b68edc9@%3Cdev.calcite.apache.org%3E



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)