xtern commented on code in PR #1917:
URL: https://github.com/apache/ignite-3/pull/1917#discussion_r1162538282


##########
modules/sql-engine/src/main/java/org/apache/ignite/internal/sql/engine/prepare/IgniteSqlValidator.java:
##########
@@ -169,6 +169,10 @@ protected SqlSelect createSourceSelectForUpdate(SqlUpdate 
call) {
         final SqlIdentifier targetTable = (SqlIdentifier) 
call.getTargetTable();
         final SqlValidatorTable table = 
getCatalogReader().getTable(targetTable.names);
 
+        if (table == null) {
+            throw newValidationError(call.getTargetTable(), 
RESOURCE.objectNotFound(targetTable.toString()));

Review Comment:
   > more clear to use : RESOURCE.tableNotFound
   
   I'm not sure about it.
   
   First, as you mentioned it's not a validator exception.
   We can use `RESOURCE.tableNameNotFound` instead, but still not sure about 
such a change in this task.
   
   Because we will have inconsistent behavior for MERGE queries for example:
   ```
   MERGE INTO non_existing_table USING existing_table
   ```
   will produce `Table 'NON_EXISTING_TABLE' not found`, but 
   ```
   MERGE INTO existing_table USING non_existing_table
   ```
   will produce `Object 'NON_EXISTING_TABLE' not found`
   



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