NobiGo commented on code in PR #4403:
URL: https://github.com/apache/calcite/pull/4403#discussion_r2112974263
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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:
I added this because canRewirite occurs before validate, and Cast can only
construct CAST(x AS INTEGER). And CAST(x AS INTEGER NOT NULL) in SqlNode is
invalid. `call.getOperator().rewriteCall(this, call)` return SqlNode.
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