mihaibudiu commented on code in PR #4959:
URL: https://github.com/apache/calcite/pull/4959#discussion_r3295774613


##########
core/src/main/java/org/apache/calcite/rex/RexCall.java:
##########
@@ -228,8 +228,13 @@ private boolean digestWithType() {
       return operands.get(0).isAlwaysFalse();
     case IS_NOT_FALSE:
     case IS_TRUE:
-    case CAST:
       return operands.get(0).isAlwaysTrue();
+    case CAST:

Review Comment:
   That was my question: which tests fail if you tighten the condition.
   If many do, this means this is a genuine bug and not a precondtion, and your 
previous fix is the right one.



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