thomasrebele commented on code in PR #4505:
URL: https://github.com/apache/calcite/pull/4505#discussion_r2485730768
##########
core/src/main/java/org/apache/calcite/rex/RexSimplify.java:
##########
@@ -1028,9 +1037,25 @@ private RexNode simplifyIs(RexCall call, RexUnknownAs
unknownAs) {
switch (a.getKind()) {
case LITERAL:
return rexBuilder.makeLiteral(!((RexLiteral) a).isNull());
+ case DIVIDE: {
+ RexNode op0 = ((RexCall) a).getOperands().get(0);
+ RexNode op1 = ((RexCall) a).getOperands().get(1);
+ if (RexUtil.isNull(op0) || RexUtil.isNull(op1)) {
+ return rexBuilder.makeLiteral(false);
+ }
+ if (!op1.isA(SqlKind.LITERAL)) {
+ return rexBuilder.makeCall(
+ SqlStdOperatorTable.IS_NOT_NULL, simplifyGenericNode((RexCall)
a));
+ }
+ if (checkLiteralValue(op1, BigDecimal.ZERO)) {
+ return rexBuilder.makeCall(
+ SqlStdOperatorTable.IS_NOT_NULL, simplifyGenericNode((RexCall)
a));
+ }
+ // op1 is a non-null and non-zero literal, so simplify op0
+ return simplifyIsNotNull(op0);
+ }
default:
- throw new AssertionError("every CUSTOM policy needs a handler, "
- + a.getKind());
+ return null;
Review Comment:
@zabetak specifically asked for this in his
[review](https://github.com/apache/calcite/pull/4505#discussion_r2435623000).
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