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add the missing part of the comment

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Alexey Zatelepin 2019-03-11 22:05:59 +03:00
parent 0a5adace7b
commit b9c4908edb
3 changed files with 4 additions and 3 deletions
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2
contrib/cppkafka vendored

@ -1 +1 @@
Subproject commit 9b184d881c15cc50784b28688c7c99d3d764db24 Subproject commit 860c90e92eee6690aa74a2ca7b7c5c6930dffecd

2
contrib/librdkafka vendored

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Subproject commit 51ae5f5fd8b742e56f47a8bb0136344868818285 Subproject commit 363dcad5a23dc29381cc626620e68ae418b3af19

3
dbms/src/Storages/IStorage.h
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@ -347,7 +347,8 @@ private:
mutable RWLock alter_intention_lock = RWLockImpl::create(); mutable RWLock alter_intention_lock = RWLockImpl::create();
/// It is taken for share for the entire INSERT query and the entire merge of the parts (for MergeTree). /// It is taken for share for the entire INSERT query and the entire merge of the parts (for MergeTree).
/// ALTER queries acquire an exclusive lock to ensure /// ALTER COLUMN queries acquire an exclusive lock to ensure that no new parts with the old structure
/// are added to the table and thus the set of parts to modify doesn't change.
mutable RWLock new_data_structure_lock = RWLockImpl::create(); mutable RWLock new_data_structure_lock = RWLockImpl::create();
/// Lock for the table column structure (names, types, etc.) and data path. /// Lock for the table column structure (names, types, etc.) and data path.