[feature](agg) support aggregation function agg_array_sum

Author: zhangshixin.1024

docs/sql-manual/sql-functions/aggregate-functions/agg-array-sum.md

@@ -0,0 +1,72 @@
+---
+{
+    "title": "AGG_ARRAY_SUM",
+    "language": "en"
+}
+---
+
+## Description
+
+Calculate the sum of elements at each position in the input array and return a new array
+
+## Syntax
+
+```sql
+AGG_ARRAY_SUM(<expr>)
+```
+
+## Parameters
+
+| Parameter | Description                                                    |
+| -- |----------------------------------------------------------------|
+| `<expr>` | Expression to be summed， an Array with element type Numerical. |
+
+## Return Value
+
+Returns a new array containing the sum of elements at each position of the array.
+If there is no valid data within the group, return an empty array.
+
+## Example
+
+```sql
+-- setup
+CREATE TABLE agg_array_sum_test (
+                                    `group_id` bigint(20) NOT NULL,
+                                    `array_column` array<bigint(20)> NULL
+) ENGINE=OLAP
+duplicate KEY(`group_id`)
+DISTRIBUTED BY HASH(`group_id`) BUCKETS 2
+PROPERTIES (
+        "replication_allocation" = "tag.location.default: 1",
+        "in_memory" = "false"
+        );
+insert into agg_array_sum_test values (1,[1,2,3]),(1,[4,5,6]),(2,[10,20]), (2,[40,50,60]), (2, NULL), (3,[30, 50]), (3,[20, null]), (4, null);
+```
+
+```sql
+select group_id, agg_array_sum(array_column) as sum_array from agg_array_sum_test group by group_id;
+```
+
+```text
++----------+--------------+
+| group_id | sum_array    |
++----------+--------------+
+|        2 | [50, 70, 60] |
+|        3 | [50, 50]     |
+|        1 | [5, 7, 9]    |
+|        4 | []           |
++----------+--------------+
+```
+
+```sql
+select agg_array_sum(array_column) as sum_array from agg_array_sum_test where array_column is null;
+```
+
+```text
++-----------+
+| sum_array |
++-----------+
+| []        |
++-----------+
+```
+

i18n/zh-CN/docusaurus-plugin-content-docs/current/sql-manual/sql-functions/aggregate-functions/agg-array-sum.md

@@ -0,0 +1,71 @@
+---
+{
+"title": "AGG_ARRAY_SUM",
+"language": "zh-CN"
+}
+---
+
+## 描述
+
+计算输入数组每一位置元素和，返回一个新的数组
+
+## 语法 
+
+```sql
+AGG_ARRAY_SUM(<expr>)
+```
+
+## 参数
+
+| 参数 | 说明                                          |
+| -- |---------------------------------------------|
+| `<expr>` | 需要求和的表达式，元素类型为Numerical的Array。 |
+
+## 返回值
+
+返回一个包含数组每个位置元素和的新数组。
+如果组内没有合法数据，则返回空数组。
+
+## 举例
+
+```sql
+-- setup
+CREATE TABLE agg_array_sum_test (
+                                    `group_id` bigint(20) NOT NULL,
+                                    `array_column` array<bigint(20)> NULL
+) ENGINE=OLAP
+duplicate KEY(`group_id`)
+DISTRIBUTED BY HASH(`group_id`) BUCKETS 2
+PROPERTIES (
+        "replication_allocation" = "tag.location.default: 1",
+        "in_memory" = "false"
+        );
+insert into agg_array_sum_test values (1,[1,2,3]),(1,[4,5,6]),(2,[10,20]), (2,[40,50,60]), (2, NULL), (3,[30, 50]), (3,[20, null]), (4, null);
+```
+
+```sql
+select group_id, agg_array_sum(array_column) as sum_array from agg_array_sum_test group by group_id;
+```
+
+```text
++----------+--------------+
+| group_id | sum_array    |
++----------+--------------+
+|        2 | [50, 70, 60] |
+|        3 | [50, 50]     |
+|        1 | [5, 7, 9]    |
+|        4 | []           |
++----------+--------------+
+```
+
+```sql
+select agg_array_sum(array_column) as sum_array from agg_array_sum_test where array_column is null;
+```
+
+```text
++-----------+
+| sum_array |
++-----------+
+| []        |
++-----------+
+```

sidebars.json

@@ -1822,6 +1822,7 @@
                                 "sql-manual/sql-functions/aggregate-functions/count-by-enum",
                                 "sql-manual/sql-functions/aggregate-functions/covar",
                                 "sql-manual/sql-functions/aggregate-functions/covar-samp",
+                                "sql-manual/sql-functions/aggregate-functions/agg-array-sum",
                                 "sql-manual/sql-functions/aggregate-functions/group-array-intersect",
                                 "sql-manual/sql-functions/aggregate-functions/group-array-union",
                                 "sql-manual/sql-functions/aggregate-functions/group-bit-and",