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Fixed error

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This commit is contained in:
Alexey Milovidov 2019-09-01 15:16:31 +03:00
parent 6f02cd145f
commit 27d753eab7
1 changed files with 1 additions and 1 deletions
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2
dbms/src/Common/RWLock.cpp
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@ -153,7 +153,7 @@ RWLockImpl::LockHolder RWLockImpl::getLock(RWLockImpl::Type type, const String &
if (type == Type::Write || queue.empty() || queue.back().type == Type::Write)
{
if (queue.back().type == Type::Write && query_id != RWLockImpl::NO_QUERY)
if (type == Type::Read && !queue.empty() && queue.back().type == Type::Write && query_id != RWLockImpl::NO_QUERY)
all_read_locks.check(query_id);
/// Create new group of clients