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DDLWorkerQueueTable - make loop vars a const ref

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This commit is contained in:
bharatnc 2020-12-05 16:43:54 -08:00
parent cc568a1d2c
commit c0d32dee37
1 changed files with 3 additions and 3 deletions
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6
src/Storages/System/StorageSystemDDLWorkerQueue.cpp
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@ -40,7 +40,7 @@ void StorageSystemDDLWorkerQueue::fillData(MutableColumns & res_columns, const C
[zk: localhost:2181(CONNECTED) 53] ls /clickhouse/task_queue/ddl/query-0000000004
[active, finished]
*/
for (String q : queries)
for (const String & q : queries)
{
/* Fetch all nodes under active & finished.
[zk: localhost:2181(CONNECTED) 54] ls /clickhouse/task_queue/ddl/query-0000000004/active
@ -58,7 +58,7 @@ void StorageSystemDDLWorkerQueue::fillData(MutableColumns & res_columns, const C
{
Array active_nodes_array;
active_nodes_array.reserve(active_nodes.size());
for (String active_node : active_nodes)
for (const String & active_node : active_nodes)
active_nodes_array.emplace_back(active_node);
res_columns[col_num++]->insert(active_nodes_array);
}
@ -66,7 +66,7 @@ void StorageSystemDDLWorkerQueue::fillData(MutableColumns & res_columns, const C
{
Array finished_nodes_array;
finished_nodes_array.reserve(active_nodes.size());
for (String finished_node : finished_nodes)
for (const String & finished_node : finished_nodes)
finished_nodes_array.emplace_back(finished_node);
res_columns[col_num++]->insert(finished_nodes_array);
}