jcamachor commented on a change in pull request #1909: [CALCITE-3914] Improve
SubsitutionVisitor to consider RexCall of type PLUS and TIMES for
canonicalization (Vineet Garg)
URL: https://github.com/apache/calcite/pull/1909#discussion_r406995687
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File path: core/src/main/java/org/apache/calcite/plan/SubstitutionVisitor.java
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@@ -345,13 +345,29 @@ private static RexNode canonizeNode(RexBuilder
rexBuilder, RexNode condition) {
case LESS_THAN_OR_EQUAL:
case GREATER_THAN_OR_EQUAL: {
RexCall call = (RexCall) condition;
- final RexNode left = call.getOperands().get(0);
- final RexNode right = call.getOperands().get(1);
+ RexNode left = call.getOperands().get(0);
+ left = canonizeNode(rexBuilder, left);
+ RexNode right = call.getOperands().get(1);
+ right = canonizeNode(rexBuilder, right);
+ call = (RexCall) rexBuilder.makeCall(call.getOperator(), left, right);
if (left.toString().compareTo(right.toString()) <= 0) {
return call;
Review comment:
You can return the original call if `left==call.getOperands().get(0) &&
right==call.getOperands().get(1)`. Below (for + and *), you could check if that
is the case too, and return the original call otherwise; it is worth skipping
new expression creation in these cases).
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