TherChenYang opened a new pull request, #30258:
URL: https://github.com/apache/shardingsphere/pull/30258
Fixes #30253.
Changes proposed in this pull request:
- Support the parsing of the match syntax in SQLServer [MATCH
(Transact-SQL)](https://learn.microsoft.com/zh-cn/sql/t-sql/queries/match-sql-graph?view=sql-server-ver16)
- Support parsing the syntax of graph agg functions in SQL Server.
[SHORTEST_PATH
（Transact-SQL）](https://learn.microsoft.com/zh-tw/sql/relational-databases/graphs/sql-graph-shortest-path?view=sql-server-ver16#for-path)
#### GRAPH_PATH_AGGREGATE syntax rules
<img width="646" alt="image"
src="https://github.com/apache/shardingsphere/assets/124348939/6c978172-0a55-49dd-bfeb-4ff1939a70f6";>
#### Supported SQL cases are as follows
##### case1
``` sql
SELECT Person2.name AS FriendName
FROM Person Person1, friend, Person Person2
WHERE MATCH(Person1-(friend)->Person2)
AND Person1.name = 'Alice';
```
[link](https://learn.microsoft.com/zh-cn/sql/t-sql/queries/match-sql-graph?view=sql-server-ver16)
##### case2
```sql
SELECT Person3.name AS FriendName
FROM Person Person1, friend, Person Person2, friend friend2, Person Person3
WHERE MATCH(Person1-(friend)->Person2-(friend2)->Person3)
AND Person1.name = 'Alice';
```
[link](https://learn.microsoft.com/zh-cn/sql/t-sql/queries/match-sql-graph?view=sql-server-ver16)
##### case3
```sql
SELECT Person1.name AS Friend1, Person2.name AS Friend2
FROM Person Person1, friend friend1, Person Person2,
friend friend2, Person Person0
WHERE MATCH(Person1-(friend1)->Person0 AND Person2-(friend2)->Person0);
```
[link](https://learn.microsoft.com/zh-cn/sql/t-sql/queries/match-sql-graph?view=sql-server-ver16)
##### case4
```sql
SELECT PersonName, Friends
FROM (
SELECT
Person1.name AS PersonName,
STRING_AGG(Person2.name, '->') WITHIN GROUP (GRAPH PATH) AS Friends,
LAST_VALUE(Person2.name) WITHIN GROUP (GRAPH PATH) AS LastNode
FROM
Person AS Person1,
friendOf FOR PATH AS fo,
Person FOR PATH AS Person2
WHERE MATCH(SHORTEST_PATH(Person1(-(fo)->Person2)+))
AND Person1.name = 'Jacob'
) AS Q
WHERE Q.LastNode = 'Alice'
```
[link](https://learn.microsoft.com/zh-cn/sql/relational-databases/graphs/sql-graph-shortest-path?view=sql-server-ver16)
##### case5
```sql
SELECT
Person1.name AS PersonName,
STRING_AGG(Person2.name, '->') WITHIN GROUP (GRAPH PATH) AS Friends
FROM
Person AS Person1,
friendOf FOR PATH AS fo,
Person FOR PATH AS Person2
WHERE MATCH(SHORTEST_PATH(Person1(-(fo)->Person2){1,3}))
AND Person1.name = 'Jacob'
```
[link](https://learn.microsoft.com/zh-cn/sql/relational-databases/graphs/sql-graph-shortest-path?view=sql-server-ver16)
##### case6
```sql
SELECT
Person1.name AS PersonName,
STRING_AGG(Person2.name, '->') WITHIN GROUP (GRAPH PATH) AS Friends,
Restaurant.name
FROM
Person AS Person1,
friendOf FOR PATH AS fo,
Person FOR PATH AS Person2,
likes,
Restaurant
WHERE MATCH(SHORTEST_PATH(Person1(-(fo)->Person2){1,3}) AND
LAST_NODE(Person2)-(likes)->Restaurant )
AND Person1.name = 'Jacob'
AND Restaurant.name = 'Ginger and Spice'
```
[link](https://learn.microsoft.com/zh-cn/sql/relational-databases/graphs/sql-graph-shortest-path?view=sql-server-ver16)
---
Before committing this PR, I'm sure that I have checked the following
options:
- [x] My code follows the [code of
conduct](https://shardingsphere.apache.org/community/en/involved/conduct/code/)
of this project.
- [x] I have self-reviewed the commit code.
- [ ] I have (or in comment I request) added corresponding labels for the
pull request.
- [x] I have passed maven check locally : `./mvnw clean install -B -T1C
-Dmaven.javadoc.skip -Dmaven.jacoco.skip -e`.
- [ ] I have made corresponding changes to the documentation.
- [x] I have added corresponding unit tests for my changes.
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