danny0405 commented on a change in pull request #1478: [CALCITE-3378]
AssertionError for checking RexNode implify
URL: https://github.com/apache/calcite/pull/1478#discussion_r335271473
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File path: core/src/main/java/org/apache/calcite/rex/RexUtil.java
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@@ -302,7 +303,16 @@ public static RexNode removeCast(RexNode e) {
for (;;) {
switch (e.getKind()) {
case CAST:
+ RelDataType destType = e.getType();
e = ((RexCall) e).operands.get(0);
+ if (!SqlTypeUtil.canCastFrom(destType, e.getType(), true)) {
+ throw new UnsupportedOperationException(
Review comment:
AFAIK, the `removeCast` doesn't say that it would only remove the redundant
casts, it just remove `any` casts, so i don't think we should add a
`SqlTypeUtil.canCastFrom` check here and throws exception. It is the invoker
that should apply these rules.
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