[CALCITE-5297] Casting dynamic variable twice throws exception

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.33.0
• Component/s: core
• Labels: pull-request-available
• Assignee: Dmitry Sysolyatin
• Reporter: Dmitry Sysolyatin
• Created: 23/Sep/22 11:12
• Updated: 07/Feb/23 22:33
• Resolved: 28/Sep/22 00:52

Description

Executing of

SELECT CAST(CAST(? AS INTEGER) AS CHAR)

query throws exception:

Conversion to relational algebra failed to preserve datatypes:
validated type:
RecordType(CHAR(1) NOT NULL EXPR$0) NOT NULL
converted type:
RecordType(CHAR(1) EXPR$0) NOT NULL
rel:
LogicalProject(EXPR$0=[CAST(?0):CHAR(1)])
  LogicalValues(tuples=[[{ 0 }]])

Testcase - https://github.com/apache/calcite/commit/4e32d2997b80effda66d46af06ec376b44856ead

Issue Links

• links to: GitHub Pull Request #2918