Aleksey Plekhanov created IGNITE-25830:
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Summary: Calcite engine. Double coalesce with null literal throws
an exception
Key: IGNITE-25830
URL: https://issues.apache.org/jira/browse/IGNITE-25830
Project: Ignite
Issue Type: Bug
Reporter: Aleksey Plekhanov
Quries like:
{code:java}
SELECT COALESCE(COALESCE(null, 'a'), 'b')
{code}
Fail with:
{noformat}
java.lang.AssertionError: Conversion to relational algebra failed to preserve
datatypes:
validated type:
RecordType(VARCHAR(1024) CHARACTER SET "UTF-8" NOT NULL EXPR$0) NOT NULL
converted type:
RecordType(CHAR(1) CHARACTER SET "UTF-8" NOT NULL EXPR$0) NOT NULL
{noformat}
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