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https://issues.apache.org/jira/browse/IGNITE-19881?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Maksim Zhuravkov updated IGNITE-19881:
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Summary: Sql. Queries that access columns of type REAL may require adding
an explicit cast in order to pick an index. (was: Sql. Queries that access
columns of type REAL may require explicit casts in order to pick an index.)
> Sql. Queries that access columns of type REAL may require adding an explicit
> cast in order to pick an index.
> ------------------------------------------------------------------------------------------------------------
>
> Key: IGNITE-19881
> URL: https://issues.apache.org/jira/browse/IGNITE-19881
> Project: Ignite
> Issue Type: Bug
> Components: sql
> Affects Versions: 3.0.0-beta1
> Reporter: Maksim Zhuravkov
> Priority: Minor
> Labels: ignite-3
>
> When a column is compared with a non-integer numeric literal, index is not
> picked :
> {code:java}
> sql("CREATE TABLE t_real (ID INTEGER PRIMARY KEY, VAL REAL)");
> sql("CREATE INDEX t_real_idx ON t_real(VAL)");
> sql("INSERT INTO t_real VALUES (1, 42)");
> // 1 fails
> assertQuery("SELECT id FROM t_real WHERE val = 42.0")
> .matches(containsIndexScan("PUBLIC", "T_REAL", "T_REAL_IDX"))
> .returns(1)
> .check();
> // 2 passes
> assertQuery("SELECT id FROM t_real WHERE val = 42.0::REAL")
> .matches(containsIndexScan("PUBLIC", "T_REAL", "T_REAL_IDX"))
> .returns(1)
> .check();
> {code}
> *Expected behaviour*: Query#1 should use an index w/o a cast.
> *Additional information*: When a literal is an integer, sql-engine picks an
> index:
> {code:java}
> assertQuery("SELECT id FROM t_real WHERE val = 42")
> .matches(containsIndexScan("PUBLIC", "T_REAL", "T_REAL_IDX"))
> .returns(1)
> .check();
> {code}
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