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Do not perform optimize_skip_unused_shards for cluster with one node

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This commit is contained in:
Azat Khuzhin 2021-04-12 22:15:58 +03:00
parent fafe8c00fe
commit a497d4d462
3 changed files with 4 additions and 1 deletions
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2
src/Storages/StorageDistributed.cpp
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@ -468,7 +468,7 @@ QueryProcessingStage::Enum StorageDistributed::getQueryProcessingStage(
/// Always calculate optimized cluster here, to avoid conditions during read()
/// (Anyway it will be calculated in the read())
if (settings.optimize_skip_unused_shards)
if (getClusterQueriedNodes(settings, cluster) > 1 && settings.optimize_skip_unused_shards)
{
ClusterPtr optimized_cluster = getOptimizedCluster(local_context, metadata_snapshot, query_info.query);
if (optimized_cluster)

0
tests/queries/0_stateless/01812_optimize_skip_unused_shards_single_node.reference Normal file
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3
tests/queries/0_stateless/01812_optimize_skip_unused_shards_single_node.sql Normal file
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@ -0,0 +1,3 @@
-- remote() does not have sharding key, while force_optimize_skip_unused_shards=2 requires from table to have it.
-- But due to only one node, everything works.
select * from remote('127.1', system.one) settings optimize_skip_unused_shards=1, force_optimize_skip_unused_shards=2 format Null;