[CALCITE-7705] LISTAGG result type is never nullable - #5174
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Signed-off-by: Mihai Budiu <mbudiu@feldera.com>
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xuzifu666
approved these changes
Aug 11, 2026
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Jira Link
CALCITE-7705
Changes Proposed
LISTAGGcan sometimes returnNULL, yet the type inference declared the type non-nullable.This also fixes
STRING_AGGandGROUP_CONCATwhich have the same problem.