AMashenkov commented on code in PR #6553:
URL: https://github.com/apache/ignite-3/pull/6553#discussion_r2329974804


##########
docs/_docs/developers-guide/clients/overview.adoc:
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@@ -105,6 +105,60 @@ For each key that needs updating, the client will get the 
name of the node holdi
 
 NOTE: Partition awareness assumes that the cluster is stable. Client receives 
information about cluster data assignments in the background, and it may be 
outdated by the time an update is sent. If it is, nodes will automatically 
redirect requests to correct nodes until data on the client is updated.
 
+=== Limitations
+
+* Equality on affinity columns required
+    Partition awareness works only if the SQL query contains an equality 
condition on all colocated (affinity) columns. This is required for the client 
to route SQL query to the node where the partition with the data resides.
+
+* Explicit transactions are not supported

Review Comment:
   Ok.
   As we discussed, PA can work 
   * for KV case for DML  - covered by the next statement "DML query"
   * select query over single partition - covered by previous statement 
"Equality on affinity columns"
   
   So, I've just dropped this part



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