Alireza Samadianzakaria created BEAM-7895:
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Summary: Plugging BeamCostModel and Metadata Handlers in JDBC Path
Key: BEAM-7895
URL: https://issues.apache.org/jira/browse/BEAM-7895
Project: Beam
Issue Type: New Feature
Components: dsl-sql
Reporter: Alireza Samadianzakaria
Currently the SQL Transform Path uses BeamCostModel and custom MetadataHandler
for NonCumulativeCost.
Similar to what we have done in CalciteQueryPlanner, we need to plug the
followings in the JDBC Path:
1- Plug BeamCostModel.FACTORY as the CostFactory for the planner.
2- Plug NonCumulativeCostImpl.SOURCE for estimating nonCumulativeCost of the
nodes.
3- Plug RelMdNodeStats.SOURCE as a handler to estimate NodeStatsSource.
Alternatively, if we plug our cost model in JDBC path, since both paths are
using the same cost model, we can remove NonCumulativeCostImpl.SOURCE as
handler from both of them and instead of using beamComputeSelfCost(), we can
override computeSelfCost for all the nodes.
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