mihaibudiu commented on code in PR #4403:
URL: https://github.com/apache/calcite/pull/4403#discussion_r2113125566
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core/src/main/java/org/apache/calcite/sql/SqlKind.java:
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@@ -662,6 +662,9 @@ public enum SqlKind {
/** {@code IS NOT NULL} operator. */
IS_NOT_NULL,
+ /** {@code CAST NOT NULL} operator. */
+ CAST_NOT_NULL,
Review Comment:
could nullif have the opposite problem, when a is never null, because the
result of nullif is always nullable?
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