Merging #52352

src/Storages/StorageSet.cpp

@@ -156,12 +156,62 @@ StorageSet::StorageSet(
 }
 
 
-void StorageSet::insertBlock(const Block & block, ContextPtr) { set->insertFromBlock(block.getColumnsWithTypeAndName()); }
-void StorageSet::finishInsert() { set->finishInsert(); }
+SetPtr StorageSet::getSet() const
+{
+    std::lock_guard lock(mutex);
+    return set;
+}
+
+
+void StorageSet::insertBlock(const Block & block, ContextPtr)
+{
+    SetPtr current_set;
+    {
+        std::lock_guard lock(mutex);
+        current_set = set;
+    }
+    current_set->insertFromBlock(block.getColumnsWithTypeAndName());
+}
 
-size_t StorageSet::getSize(ContextPtr) const { return set->getTotalRowCount(); }
-std::optional<UInt64> StorageSet::totalRows(const Settings &) const { return set->getTotalRowCount(); }
-std::optional<UInt64> StorageSet::totalBytes(const Settings &) const { return set->getTotalByteCount(); }
+void StorageSet::finishInsert()
+{
+    SetPtr current_set;
+    {
+        std::lock_guard lock(mutex);
+        current_set = set;
+    }
+    current_set->finishInsert();
+}
+
+size_t StorageSet::getSize(ContextPtr) const
+{
+    SetPtr current_set;
+    {
+        std::lock_guard lock(mutex);
+        current_set = set;
+    }
+    return current_set->getTotalRowCount();
+}
+
+std::optional<UInt64> StorageSet::totalRows(const Settings &) const
+{
+    SetPtr current_set;
+    {
+        std::lock_guard lock(mutex);
+        current_set = set;
+    }
+    return current_set->getTotalRowCount();
+}
+
+std::optional<UInt64> StorageSet::totalBytes(const Settings &) const
+{
+    SetPtr current_set;
+    {
+        std::lock_guard lock(mutex);
+        current_set = set;
+    }
+    return current_set->getTotalByteCount();
+}
 
 void StorageSet::truncate(const ASTPtr &, const StorageMetadataPtr & metadata_snapshot, ContextPtr, TableExclusiveLockHolder &)
 {
@@ -176,8 +226,13 @@ void StorageSet::truncate(const ASTPtr &, const StorageMetadataPtr & metadata_sn
     Block header = metadata_snapshot->getSampleBlock();
 
     increment = 0;
-    set = std::make_shared<Set>(SizeLimits(), 0, true);
-    set->setHeader(header.getColumnsWithTypeAndName());
+
+    auto new_set = std::make_shared<Set>(SizeLimits(), 0, true);
+    new_set->setHeader(header.getColumnsWithTypeAndName());
+    {
+        std::lock_guard lock(mutex);
+        set = new_set;
+    }
 }
 
 

src/Storages/StorageSet.h

@@ -79,15 +79,17 @@ class StorageSet final : public StorageSetOrJoinBase
     String getName() const override { return "Set"; }
 
     /// Access the insides.
-    SetPtr & getSet() { return set; }
+    SetPtr getSet() const;
 
     void truncate(const ASTPtr &, const StorageMetadataPtr & metadata_snapshot, ContextPtr, TableExclusiveLockHolder &) override;
 
     std::optional<UInt64> totalRows(const Settings & settings) const override;
     std::optional<UInt64> totalBytes(const Settings & settings) const override;
 
 private:
-    SetPtr set;
+    /// Allows to concurrently truncate the set and work (read/fill) the existing set.
+    mutable std::mutex mutex;
+    SetPtr set TSA_GUARDED_BY(mutex);
 
     void insertBlock(const Block & block, ContextPtr) override;
     void finishInsert() override;

tests/queries/0_stateless/02867_storage_set_tsan.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+# Tags: race, no-debug
+
+CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+# shellcheck source=../shell_config.sh
+. "$CURDIR"/../shell_config.sh
+
+$CLICKHOUSE_CLIENT -mn -q """
+DROP TABLE IF EXISTS t1_02867;
+CREATE TABLE t1_02867 (x UInt64) ENGINE=Set();
+"""
+
+function repeat_select() {
+    n=0
+    while [ "$n" -lt 20 ];
+    do
+        n=$(( n + 1 ))
+        $CLICKHOUSE_CLIENT -q "SELECT count() as a FROM numbers(10) WHERE number IN t1_02867" > /dev/null 2> /dev/null || exit
+    done
+}
+
+function repeat_truncate_insert() {
+    n=0
+    while [ "$n" -lt 20 ];
+    do
+        n=$(( n + 1 ))
+        $CLICKHOUSE_CLIENT -q "TRUNCATE t1_02867;" > /dev/null 2> /dev/null || exit
+    done
+}
+
+repeat_select &
+repeat_truncate_insert &
+repeat_select &
+repeat_truncate_insert &
+repeat_select &
+repeat_truncate_insert &
+repeat_select &
+repeat_truncate_insert &
+
+sleep 10
+
+$CLICKHOUSE_CLIENT -mn -q "DROP TABLE IF EXISTS t1_02867;"