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authorvitalyisaev <vitalyisaev@ydb.tech>2023-11-14 09:58:56 +0300
committervitalyisaev <vitalyisaev@ydb.tech>2023-11-14 10:20:20 +0300
commitc2b2dfd9827a400a8495e172a56343462e3ceb82 (patch)
treecd4e4f597d01bede4c82dffeb2d780d0a9046bd0 /contrib/clickhouse/src/Functions/blockNumber.cpp
parentd4ae8f119e67808cb0cf776ba6e0cf95296f2df7 (diff)
downloadydb-c2b2dfd9827a400a8495e172a56343462e3ceb82.tar.gz
YQ Connector: move tests from yql to ydb (OSS)
Перенос папки с тестами на Коннектор из папки yql в папку ydb (синхронизируется с github).
Diffstat (limited to 'contrib/clickhouse/src/Functions/blockNumber.cpp')
-rw-r--r--contrib/clickhouse/src/Functions/blockNumber.cpp76
1 files changed, 76 insertions, 0 deletions
diff --git a/contrib/clickhouse/src/Functions/blockNumber.cpp b/contrib/clickhouse/src/Functions/blockNumber.cpp
new file mode 100644
index 0000000000..52263061c4
--- /dev/null
+++ b/contrib/clickhouse/src/Functions/blockNumber.cpp
@@ -0,0 +1,76 @@
+#include <Functions/IFunction.h>
+#include <Functions/FunctionFactory.h>
+#include <DataTypes/DataTypesNumber.h>
+#include <Columns/ColumnsNumber.h>
+#include <atomic>
+
+
+namespace DB
+{
+namespace
+{
+
+/** Incremental columns number among calls of this function. */
+class FunctionBlockNumber : public IFunction
+{
+private:
+ mutable std::atomic<size_t> columns_number{0};
+
+public:
+ static constexpr auto name = "blockNumber";
+ static FunctionPtr create(ContextPtr)
+ {
+ return std::make_shared<FunctionBlockNumber>();
+ }
+
+ /// Get the function name.
+ String getName() const override
+ {
+ return name;
+ }
+
+ bool isStateful() const override
+ {
+ return true;
+ }
+
+ bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override
+ {
+ return false;
+ }
+
+ size_t getNumberOfArguments() const override
+ {
+ return 0;
+ }
+
+ bool isDeterministic() const override
+ {
+ return false;
+ }
+
+ bool isDeterministicInScopeOfQuery() const override
+ {
+ return false;
+ }
+
+ DataTypePtr getReturnTypeImpl(const DataTypes & /*arguments*/) const override
+ {
+ return std::make_shared<DataTypeUInt64>();
+ }
+
+ ColumnPtr executeImpl(const ColumnsWithTypeAndName &, const DataTypePtr &, size_t input_rows_count) const override
+ {
+ size_t current_columns_number = columns_number.fetch_add(1, std::memory_order_relaxed);
+ return ColumnUInt64::create(input_rows_count, current_columns_number);
+ }
+};
+
+}
+
+REGISTER_FUNCTION(BlockNumber)
+{
+ factory.registerFunction<FunctionBlockNumber>();
+}
+
+}