Aleksey Plekhanov created IGNITE-27431:
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Summary: Calcite engine. Optimize scans with filter
Key: IGNITE-27431
URL: https://issues.apache.org/jira/browse/IGNITE-27431
Project: Ignite
Issue Type: Improvement
Reporter: Aleksey Plekhanov
Assignee: Aleksey Plekhanov
Currently we process scans in the following way:
* Read all row columns from storage
* Check row by filter
* If row is accepted - transform it, and pass to the next node
* Process next row
Usually filter checks only subset of columns, we don't need to fill all row
columns, some of them filled but not used. Let's implement the following scheme:
* Read columns required by filter from storage
* Check row by filter
* If row is accepted, read remaining columns, transform row, and pass to the
next node
* Process next row
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