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https://issues.apache.org/jira/browse/HIVE-27157?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Stamatis Zampetakis resolved HIVE-27157.
----------------------------------------
Fix Version/s: 4.0.0
Resolution: Fixed
Fixed in
https://github.com/apache/hive/commit/b30fe4c1af9d134e7e533a715f2401a67530d016.
Thanks for the review [~kkasa]!
> AssertionError when inferring return type for unix_timestamp function
> ---------------------------------------------------------------------
>
> Key: HIVE-27157
> URL: https://issues.apache.org/jira/browse/HIVE-27157
> Project: Hive
> Issue Type: Bug
> Components: CBO
> Affects Versions: 4.0.0-alpha-2
> Reporter: Stamatis Zampetakis
> Assignee: Stamatis Zampetakis
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> Any attempt to derive the return data type for the {{unix_timestamp}}
> function results into the following assertion error.
> {noformat}
> java.lang.AssertionError: typeName.allowsPrecScale(true, false): BIGINT
> at
> org.apache.calcite.sql.type.BasicSqlType.checkPrecScale(BasicSqlType.java:65)
> at org.apache.calcite.sql.type.BasicSqlType.<init>(BasicSqlType.java:81)
> at
> org.apache.calcite.sql.type.SqlTypeFactoryImpl.createSqlType(SqlTypeFactoryImpl.java:67)
> at
> org.apache.calcite.sql.fun.SqlAbstractTimeFunction.inferReturnType(SqlAbstractTimeFunction.java:78)
> at
> org.apache.calcite.rex.RexBuilder.deriveReturnType(RexBuilder.java:278)
> {noformat}
> due to a faulty implementation of type inference for the respective operators:
> *
> [https://github.com/apache/hive/blob/52360151dc43904217e812efde1069d6225e9570/ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/reloperators/HiveUnixTimestampSqlOperator.java]
> *
> [https://github.com/apache/hive/blob/52360151dc43904217e812efde1069d6225e9570/ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/reloperators/HiveToUnixTimestampSqlOperator.java]
> Although at this stage in master it is not possible to reproduce the problem
> with an actual SQL query the buggy implementation must be fixed since slight
> changes in the code/CBO rules may lead to methods relying on
> {{{}SqlOperator.inferReturnType{}}}.
> Note that in older versions of Hive it is possible to hit the AssertionError
> in various ways. For example in Hive 3.1.3 (and older), the error may come
> from
> [HiveRelDecorrelator|https://github.com/apache/hive/blob/4df4d75bf1e16fe0af75aad0b4179c34c07fc975/ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/rules/HiveRelDecorrelator.java#L1933]
> in the presence of sub-queries.
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