rdblue commented on code in PR #4902:
URL: https://github.com/apache/iceberg/pull/4902#discussion_r917445183


##########
spark/v3.2/spark/src/main/java/org/apache/iceberg/spark/actions/SparkZOrderStrategy.java:
##########
@@ -133,9 +133,23 @@ public SparkZOrderStrategy(Table table, SparkSession 
spark, List<String> zOrderC
           "Cannot perform ZOrdering, all columns provided were identity 
partition columns and cannot be used.");
     }
 
+    validateColumnsExistence(table, spark, zOrderColNames);
+
     this.zOrderColNames = zOrderColNames;
   }
 
+  private void validateColumnsExistence(Table table, SparkSession spark, 
List<String> colNames) {
+    boolean caseSensitive = 
Boolean.parseBoolean(spark.conf().get("spark.sql.caseSensitive"));

Review Comment:
   After seeing what this is doing with the `caseSensitive` value, I think this 
is reasonable. This is using the value to decide whether to use `findField` or 
`caseInsensitiveFindField`. I don't see a good way to pass a resolver for those 
cases, so this seems fine to me.



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