Vladimir Ozerov created IGNITE-6945:
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Summary: SQL: optionally do not copy offheap rows for local
SqlQuery
Key: IGNITE-6945
URL: https://issues.apache.org/jira/browse/IGNITE-6945
Project: Ignite
Issue Type: Task
Security Level: Public (Viewable by anyone)
Components: sql
Reporter: Vladimir Ozerov
Assignee: Taras Ledkov
Fix For: 2.4
Currently when iterating over rows we eagerly materialize them [1]. If key or
value are large enough, we could loose a lot of time on offheap-heap copying.
To partially mitigate this, we can do the following:
1) Add new flag {{SqlQuery.localNoCopy}} which is applicable only for local
queries.
2) When enabled we will not copy final {{_KEY}} and {{_VAL}} columns to heap.
but rather wrap them into {{BinaryOffheapObjectImpl}}
3) These rows must be released when query iterator switches to the next row.
[1] {{H2RowFactory.getRow}}
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