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https://issues.apache.org/jira/browse/IGNITE-18890?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yury Gerzhedovich updated IGNITE-18890:
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Epic Link: IGNITE-19479
> Sql. Avoid full index scans in case of null dynamic parameter
> -------------------------------------------------------------
>
> Key: IGNITE-18890
> URL: https://issues.apache.org/jira/browse/IGNITE-18890
> Project: Ignite
> Issue Type: Improvement
> Components: sql
> Reporter: Yury Gerzhedovich
> Priority: Major
> Labels: ignite-3
>
> The ticket is a copy of IGNITE-17889 to port it from AI2 to AI3.
> Currently, queries like:
> {code:java}
> SELECT * FROM tbl WHERE a >= ?
> {code}
> Should return no rows if dynamic parameter is null, but can be downgraded to
> full index scan in case table have index on column {{a}} (ASCENDING order,
> NULLS FIRST).
> We should somehow analyse nulls in search bounds and return empty rows
> iterator for regular field conditions (`=`, `<`, '>`, etc). But also nulls
> should be processed as is in search bounds for conditions like `IS NULL`, `IS
> NOT NULL`, `IS NOT DISTINCT FROM` (the last one not supported currently).
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