[feature-array](array-type) Add array function array_popback (#13641)

Remove the last element from array.

```
mysql> select array_popback(['test', NULL, 'value']);
+-----------------------------------------------------+
| array_popback(ARRAY('test', NULL, 'value')) |
+-----------------------------------------------------+
| [test, NULL]                                        |
+-----------------------------------------------------+
```

be/src/vec/functions/array/function_array_popback.cpp

@@ -0,0 +1,84 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+#include <string_view>
+
+#include "vec/columns/column_array.h"
+#include "vec/columns/column_string.h"
+#include "vec/common/string_ref.h"
+#include "vec/data_types/data_type_array.h"
+#include "vec/data_types/data_type_number.h"
+#include "vec/functions/array/function_array_utils.h"
+#include "vec/functions/function.h"
+#include "vec/functions/simple_function_factory.h"
+
+namespace doris::vectorized {
+
+class FunctionArrayPopback : public IFunction {
+public:
+    static constexpr auto name = "array_popback";
+    static FunctionPtr create() { return std::make_shared<FunctionArrayPopback>(); }
+
+    /// Get function name.
+    String get_name() const override { return name; }
+
+    bool is_variadic() const override { return false; }
+
+    size_t get_number_of_arguments() const override { return 1; }
+
+    DataTypePtr get_return_type_impl(const DataTypes& arguments) const override {
+        DCHECK(is_array(arguments[0]))
+                << "First argument for function: " << name
+                << " should be DataTypeArray but it has type " << arguments[0]->get_name() << ".";
+        return arguments[0];
+    }
+
+    Status execute_impl(FunctionContext* context, Block& block, const ColumnNumbers& arguments,
+                        size_t result, size_t input_rows_count) override {
+        auto array_column =
+                block.get_by_position(arguments[0]).column->convert_to_full_column_if_const();
+        // extract src array column
+        ColumnArrayExecutionData src;
+        if (!extract_column_array_info(*array_column, src)) {
+            return Status::RuntimeError(
+                    fmt::format("execute failed, unsupported types for function {}({})", get_name(),
+                                block.get_by_position(arguments[0]).type->get_name()));
+        }
+        // prepare dst array column
+        bool is_nullable = src.nested_nullmap_data ? true : false;
+        ColumnArrayMutableData dst = create_mutable_data(src.nested_col, is_nullable);
+        dst.offsets_ptr->reserve(input_rows_count);
+        // start from 1
+        auto offset_column = ColumnInt64::create(array_column->size(), 1);
+        // len - 1
+        auto length_column = ColumnInt64::create();
+        for (size_t row = 0; row < src.offsets_ptr->size(); ++row) {
+            size_t off = (*src.offsets_ptr)[row - 1];
+            size_t len = (*src.offsets_ptr)[row] - off;
+            length_column->insert_value(len - 1);
+        }
+        slice_array(dst, src, *offset_column, length_column.get());
+        ColumnPtr res_column = assemble_column_array(dst);
+        block.replace_by_position(result, std::move(res_column));
+        return Status::OK();
+    }
+};
+
+void register_function_array_popback(SimpleFunctionFactory& factory) {
+    factory.register_function<FunctionArrayPopback>();
+}
+
+} // namespace doris::vectorized