liyafan82 commented on a change in pull request #1917:
URL: https://github.com/apache/calcite/pull/1917#discussion_r412078967
##########
File path: core/src/main/java/org/apache/calcite/rex/RexUtil.java
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@@ -2750,4 +2750,27 @@ public ExprSimplifier(RexSimplify simplify, RexUnknownAs
unknownAs,
return simplify.rexBuilder.makeCast(call.getType(), simplifiedNode,
matchNullability);
}
}
+
+ /**
+ * Utility to fix the inconsistencies of nullable/non-nullable types.
+ */
+ public static class RexInputRefNullabilityFixer extends RexShuttle {
+
+ private final RexBuilder rexBuilder;
+
+ private final RelDataType desiredTypes;
+
+ public RexInputRefNullabilityFixer(RexBuilder rexBuilder, RelDataType
desiredTypes) {
+ this.rexBuilder = rexBuilder;
+ this.desiredTypes = desiredTypes;
+ }
Review comment:
Revised. Thank you for the good suggestion.
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