Marios Trivyzas created FLINK-24588:
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Summary: Optimisation of chained cast calls can lead to unexpected
behaviour
Key: FLINK-24588
URL: https://issues.apache.org/jira/browse/FLINK-24588
Project: Flink
Issue Type: Sub-task
Components: Table SQL / Planner
Affects Versions: 1.15.0
Reporter: Marios Trivyzas
Simplification of Cast chained calls can lead to unexpected behaviour:
CAST(CAST(CAST(123456 AS TINYINT) AS INT) AS BIGINT)
is simplified to
{noformat}
CAST(123456 AS BIGINT){noformat}
and returns *123456* with *BIGINT* data type, where the first inner cast as
TINYINT should already fail because the value is out of range.
For example, for PostgreSQL:
{noformat}
postgres=# select 123456::smallint::int::bigint;
ERROR: smallint out of range
{noformat}
Corresponding issue has been create at calcite:
https://issues.apache.org/jira/browse/CALCITE-4861
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