caicancai commented on code in PR #3785:
URL: https://github.com/apache/calcite/pull/3785#discussion_r1589846526
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core/src/main/java/org/apache/calcite/sql/fun/SqlLibraryOperators.java:
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@@ -270,6 +270,14 @@ private static SqlCall transformConvert(SqlValidator
validator, SqlCall call) {
.andThen(SqlTypeTransforms.TO_NULLABLE_ALL),
OperandTypes.SAME_SAME);
+ /** The "NVL2(value, value, value)" function. */
+ @LibraryOperator(libraries = {SPARK})
Review Comment:
I borrowed from NVL, it seems like NVL2 doesn't necessarily have to keep the
types the same
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