From d2267495764bb6aedb52884575d92cbb460362c7 Mon Sep 17 00:00:00 2001
From: BayoNet <da-daos@yandex.ru>
Date: Fri, 15 Nov 2019 16:28:26 +0300
Subject: [PATCH] Added randomASKII function by copying from the
 currentDatabase Function

---
 dbms/src/Functions/randomASKII.cpp            | 54 +++++++++++++++++++
 .../registerFunctionsMiscellaneous.cpp        |  2 +
 2 files changed, 56 insertions(+)
 create mode 100644 dbms/src/Functions/randomASKII.cpp

diff --git a/dbms/src/Functions/randomASKII.cpp b/dbms/src/Functions/randomASKII.cpp
new file mode 100644
index 00000000000..828e1a8028c
--- /dev/null
+++ b/dbms/src/Functions/randomASKII.cpp
@@ -0,0 +1,54 @@
+#include <Functions/IFunction.h>
+#include <Functions/FunctionFactory.h>
+#include <Interpreters/Context.h>
+#include <DataTypes/DataTypeString.h>
+#include <Core/Field.h>
+
+
+namespace DB
+{
+
+class FunctionRandomASKII : public IFunction
+{
+    const String db_name;
+
+public:
+    static constexpr auto name = "randomASKII";
+    static FunctionPtr create(const Context & context)
+    {
+        return std::make_shared<FunctionRandomASKII>(context.getRandomASKII());
+    }
+
+    explicit FunctionRandomASKII(const String & db_name_) : db_name{db_name_}
+    {
+    }
+
+    String getName() const override
+    {
+        return name;
+    }
+    size_t getNumberOfArguments() const override
+    {
+        return 0;
+    }
+
+    DataTypePtr getReturnTypeImpl(const DataTypes & /*arguments*/) const override
+    {
+        return std::make_shared<DataTypeString>();
+    }
+
+    bool isDeterministic() const override { return false; }
+
+    void executeImpl(Block & block, const ColumnNumbers &, size_t result, size_t input_rows_count) override
+    {
+        block.getByPosition(result).column = DataTypeString().createColumnConst(input_rows_count, db_name);
+    }
+};
+
+
+void registerFunctionRandomASKII(FunctionFactory & factory)
+{
+    factory.registerFunction<FunctionRandomASKII>();
+}
+
+}
diff --git a/dbms/src/Functions/registerFunctionsMiscellaneous.cpp b/dbms/src/Functions/registerFunctionsMiscellaneous.cpp
index 3c0e03e46c3..4c8a5ec84f7 100644
--- a/dbms/src/Functions/registerFunctionsMiscellaneous.cpp
+++ b/dbms/src/Functions/registerFunctionsMiscellaneous.cpp
@@ -52,6 +52,7 @@ void registerFunctionEvalMLMethod(FunctionFactory &);
 void registerFunctionBasename(FunctionFactory &);
 void registerFunctionTransform(FunctionFactory &);
 void registerFunctionGetMacro(FunctionFactory &);
+void registerFunctionRandomASKII(FunctionFactory &);
 
 #if USE_ICU
 void registerFunctionConvertCharset(FunctionFactory &);
@@ -106,6 +107,7 @@ void registerFunctionsMiscellaneous(FunctionFactory & factory)
     registerFunctionBasename(factory);
     registerFunctionTransform(factory);
     registerFunctionGetMacro(factory);
+    registerFunctionRandomASKII(factory);
 
 #if USE_ICU
     registerFunctionConvertCharset(factory);