vldpyatkov commented on code in PR #13366:
URL: https://github.com/apache/ignite/pull/13366#discussion_r3720134617


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modules/calcite/src/main/java/org/apache/ignite/internal/processors/query/calcite/prepare/IgniteSqlValidator.java:
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@@ -584,6 +613,14 @@ private boolean isSystemFieldName(String alias) {
         return super.deriveType(scope, expr);
     }
 
+    /** */
+    private void validateVersionColumnDmlTarget(SqlIdentifier id) {

Review Comment:
   For the other system fields, the circumstances are more complicated.
   For example, field _val can be used if it is the only field for a simple 
type like String or Integer.
   A _key field is available to use in the INSERT command.



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