rubenada commented on code in PR #5161:
URL: https://github.com/apache/calcite/pull/5161#discussion_r3727808674
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core/src/main/java/org/apache/calcite/rex/RexSimplify.java:
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@@ -3744,4 +3762,312 @@ void addSarg(Sarg sarg, boolean negate, RelDataType
type) {
}
}
}
+
+ /** Flips a comparison operator. e.g., GREATER_THAN → LESS_THAN. */
+ private static SqlKind flipComparison(SqlKind kind) {
+ switch (kind) {
+ case GREATER_THAN:
+ return SqlKind.LESS_THAN;
+ case GREATER_THAN_OR_EQUAL:
+ return SqlKind.LESS_THAN_OR_EQUAL;
+ case LESS_THAN:
+ return SqlKind.GREATER_THAN;
+ case LESS_THAN_OR_EQUAL:
+ return SqlKind.GREATER_THAN_OR_EQUAL;
+ case EQUALS:
+ return SqlKind.EQUALS;
+ case NOT_EQUALS:
+ return SqlKind.NOT_EQUALS;
+ default:
+ return kind;
+ }
+ }
+
+ /** Checks if a RexNode is a numeric literal (possibly wrapped in CAST). */
+ private static boolean isNumericLiteral(RexNode node) {
Review Comment:
Could this be simplified by (re)using SqlTypeUtil#isNumeric ?
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