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The following commit(s) were added to refs/heads/master by this push:
     new 0edceead80 msq: update known issue about GROUPING SETS and COUNT 
DISTINCT (#13185)
0edceead80 is described below

commit 0edceead80e0770ed93230fe7e097fe72d731bba
Author: 317brian <[email protected]>
AuthorDate: Wed Oct 5 19:47:03 2022 -0700

    msq: update known issue about GROUPING SETS and COUNT DISTINCT (#13185)
    
    * msq: update known issue about GROUPING SETS and COUNT DISTINCT
    
    * address feedback from Gian
---
 docs/multi-stage-query/known-issues.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/docs/multi-stage-query/known-issues.md 
b/docs/multi-stage-query/known-issues.md
index 8021e1e305..c76ab57aa7 100644
--- a/docs/multi-stage-query/known-issues.md
+++ b/docs/multi-stage-query/known-issues.md
@@ -40,7 +40,9 @@ an [UnknownError](./reference.md#error-codes) with a message 
including "No space
 - SELECT from a Druid datasource does not include unpublished real-time data.
 
 - GROUPING SETS and UNION ALL are not implemented. Queries using these 
features return a
-  [QueryNotSupported](reference.md#error-codes) error.
+  [QueryNotSupported](reference.md#error-codes) error. 
+
+- For some COUNT DISTINCT queries, you'll encounter a 
[QueryNotSupported](reference.md#error-codes) error that includes `Must not 
have 'subtotalsSpec'` as one of its causes. This is caused by the planner 
attempting to use GROUPING SETs, which are not implemented.
 
 - The numeric varieties of the EARLIEST and LATEST aggregators do not work 
properly. Attempting to use the numeric
   varieties of these aggregators lead to an error like


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