Method executeImpl

src/Functions/toJSONString.cpp:36–54

        bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return true; }

        ColumnPtr
        executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr & /*result_type*/, size_t input_rows_count) const override
        {
            auto res = ColumnString::create();
            ColumnString::Chars & data_to = res->getChars();
            ColumnString::Offsets & offsets_to = res->getOffsets();
            offsets_to.resize(input_rows_count);

            auto serializer = arguments[0].type->getDefaultSerialization();
            WriteBufferFromVector<ColumnString::Chars> json(data_to);
            for (size_t i = 0; i < input_rows_count; ++i)
            {
                serializer->serializeTextJSON(*arguments[0].column, i, json, format_settings);
                offsets_to[i] = json.count();
            }

            json.finalize();
            return res;
        }

    private:
        /// Affects only subset of part of settings related to json.