julianhyde commented on code in PR #2965:
URL: https://github.com/apache/calcite/pull/2965#discussion_r1020820936
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core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorUtil.java:
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@@ -1287,6 +1287,20 @@ private static FlatAggregate flattenRecurse(@Nullable
SqlCall filterCall,
}
}
+ /** Returns whether a select item is a measure. */
+ public static boolean isMeasure(SqlNode selectItem) {
+ return getMeasure(selectItem) != null;
+ }
+
+ /** Returns the measure expression if a select item is a measure, null
+ * otherwise.
+ *
+ * <p>For a measure, {@code selectItem} will have the form
+ * {@code AS(MEASURE(exp), alias)} and this method returns {@code exp}. */
+ public static @Nullable SqlNode getMeasure(SqlNode selectItem) {
+ return null;
Review Comment:
Yes, it will be extended in
[CALCITE-4496](https://issues.apache.org/jira/browse/CALCITE-4496). I added a
note.
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