```
DROP TABLE IF EXISTS foo;

CREATE TABLE foo (timestamp DateTime, x UInt64)
ENGINE = MergeTree PARTITION BY toYYYYMMDD(timestamp)
ORDER BY (timestamp);

INSERT INTO foo (timestamp, x) SELECT toDateTime('2020-01-01 00:05:00'), number from system.numbers_mt LIMIT 100;

SELECT count() FROM system.mutations; -- ok

ALTER TABLE foo UPDATE x = 1 WHERE x = (SELECT x from foo WHERE x = 1);

SELECT count() FROM system.mutations; -- stuck

```
#include <Core/Settings.h>
#include <Core/NamesAndTypes.h>
#include <Common/checkStackSize.h>
#include <Interpreters/TreeRewriter.h>
#include <Interpreters/LogicalExpressionsOptimizer.h>
#include <Interpreters/QueryAliasesVisitor.h>
#include <Interpreters/ArrayJoinedColumnsVisitor.h>
#include <Interpreters/TranslateQualifiedNamesVisitor.h>
#include <Interpreters/Context.h>
#include <Interpreters/FunctionNameNormalizer.h>
#include <Interpreters/MarkTableIdentifiersVisitor.h>
#include <Interpreters/QueryNormalizer.h>
#include <Interpreters/ExecuteScalarSubqueriesVisitor.h>
#include <Interpreters/CollectJoinOnKeysVisitor.h>
#include <Interpreters/RequiredSourceColumnsVisitor.h>
#include <Interpreters/GetAggregatesVisitor.h>
#include <Interpreters/UserDefinedSQLFunctionVisitor.h>
#include <Interpreters/TableJoin.h>
#include <Interpreters/ExpressionActions.h> 
#include <Interpreters/getTableExpressions.h>
#include <Interpreters/TreeOptimizer.h>
#include <Interpreters/replaceAliasColumnsInQuery.h>
#include <Interpreters/PredicateExpressionsOptimizer.h>
#include <Parsers/ASTExpressionList.h>
#include <Parsers/ASTFunction.h>
#include <Parsers/ASTSelectQuery.h>