vlsi commented on a change in pull request #1703: WIP: [CALCITE-2450] Reorder
RexCall predicates to a canonical form
URL: https://github.com/apache/calcite/pull/1703#discussion_r361923755
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File path: core/src/main/java/org/apache/calcite/rex/RexCall.java
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@@ -127,7 +143,23 @@ protected final StringBuilder
appendOperands(StringBuilder sb) {
includeType = RexDigestIncludeType.NO_TYPE;
}
}
- sb.append(((RexLiteral) operand).computeDigest(includeType));
+ operandDigests.add(((RexLiteral) operand).computeDigest(includeType));
+ }
+ int totalLength = (operandDigests.size() - 1) * 2; // commas
+ for (String s : operandDigests) {
Review comment:
They must not be empty, because `AND()`, `=()` and so on means nothing.
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