[ https://issues.apache.org/jira/browse/CALCITE-1499?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Maryann Xue updated CALCITE-1499: --------------------------------- Summary: Exclude VolcanoPlanner's "originalRoot" from default planning process (was: Add an option to exclude VolcanoPlanner's "originalRoot" from planning process) > Exclude VolcanoPlanner's "originalRoot" from default planning process > --------------------------------------------------------------------- > > Key: CALCITE-1499 > URL: https://issues.apache.org/jira/browse/CALCITE-1499 > Project: Calcite > Issue Type: Improvement > Components: core > Affects Versions: 1.10.0 > Reporter: Maryann Xue > Assignee: Maryann Xue > > The Calcite compilation framework runs a series of Programs for query > planning. The default programs consist of some pre-processing HepPrograms, > e.g., de-correlation, field-trimming, etc., the volcano planning program, > and some post-processing HepPrograms. In {{Prepare.optimize()}}, > {{planner.setRoot()}} is called before running the programs. As a result, the > original rel from sql-to-rel conversion becomes the "originalRoot" in the > VolcanoPlanner, and the new rel from the pre-processing programs becomes the > new "root". In some cases, we would only want to run volcano planning on the > new root based on the assumption that the new root is the desired form after > pre-processing. And if we have an option to turn off the planning of the > original root, the planning space can be significantly reduced. -- This message was sent by Atlassian JIRA (v6.3.4#6332)