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https://issues.apache.org/jira/browse/IGNITE-19709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17731645#comment-17731645
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Konstantin Orlov commented on IGNITE-19709:
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We always must start transaction. Transaction is required to acquire schema of
a proper version.
> Sql. Get rid of starting implicit transactions for SELECT without FROM
> statements, change mapping.
> --------------------------------------------------------------------------------------------------
>
> Key: IGNITE-19709
> URL: https://issues.apache.org/jira/browse/IGNITE-19709
> Project: Ignite
> Issue Type: Improvement
> Components: sql
> Affects Versions: 3.0.0-beta1
> Reporter: Evgeny Stanilovsky
> Assignee: Evgeny Stanilovsky
> Priority: Major
> Labels: calcite3-required, ignite-3
> Time Spent: 20m
> Remaining Estimate: 0h
>
> 1. For sql requests like SELECT SUBSTRING('text', 1, 3); no need to start
> implicit tx.
> 2. mapping implemented through reflection call, it`s hard to debug and seems
> can be implemented more clear, need to refactor.
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