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https://issues.apache.org/jira/browse/IGNITE-22358?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Maksim Zhuravkov updated IGNITE-22358:
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Issue Type: Bug (was: Improvement)
> Sql. Results of TypeFactory::leastRestrictiveType are incompatible with legal
> type transformations
> --------------------------------------------------------------------------------------------------
>
> Key: IGNITE-22358
> URL: https://issues.apache.org/jira/browse/IGNITE-22358
> Project: Ignite
> Issue Type: Bug
> Components: sql
> Reporter: Maksim Zhuravkov
> Priority: Major
> Labels: ignite-3
>
> {noformat}
> SELECT 1 UNION ALL SELECT '2000-01-01'::DATE
> # returns: DATE, DATE
> {noformat}
> Although a cast from INT to DATE should not be possible according to type
> transformation rules:
> {noformat}
> SELECT 1::DATE
> # Error: Cast function cannot convert value of type INTEGER to type DATE
> {noformat}
> This query should also return an error because it is not possible to convert
> an integer into a date.
> This happens because Calcite's SqlTypeFactoryImpl::leastRestrictiveSqlType
> contains explicit code that allows int to date conversion and that code
> completely ignores Calcite's TypeConversion rules.
> {code:java}
> else if (SqlTypeUtil.isExactNumeric(type)) {
> if (SqlTypeUtil.isExactNumeric(resultType)) {
> // TODO: come up with a cleaner way to support
> // interval + datetime = datetime
> if (types.size() > (i + 1)) {
> RelDataType type1 = types.get(i + 1);
> if (SqlTypeUtil.isDatetime(type1)) {
> resultType = type1;
> return createTypeWithNullability(resultType,
> nullCount > 0 || nullableCount > 0);
> }
> }
> {code}
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