Alireza Samadianzakaria created BEAM-7823:
---------------------------------------------
Summary: Implementing Custom MetadataHandler for NonCumulativeCost
Key: BEAM-7823
URL: https://issues.apache.org/jira/browse/BEAM-7823
Project: Beam
Issue Type: New Feature
Components: dsl-sql
Reporter: Alireza Samadianzakaria
Assignee: Alireza Samadianzakaria
Currently we use Calcite Handler for NonCumulativeCost. We need to implement
our own handler before implementing our own Cost model because of the following
reasons:
1- We need to empty the MetadataQuery cache every time that we need to get the
new cost.
2- We need to have our own method for estimating the costs instead of
computeSelfCost. This is because currently we cannot set the costFactory in
JDBC path and therefore that path still uses Calcite's cost model; later if we
set the costFactory correctly there, we may decide to override computeSelfCost
instead.
--
This message was sent by Atlassian JIRA
(v7.6.14#76016)
