fix sql support doc (#6293)

* fix sql support doc

* add sharding rewrite test case and fix sql support doc

* fix

* fix

* fix

* fix

docs/document/content/features/sharding/use-norms/sql.cn.md

@@ -110,6 +110,7 @@ SELECT * FROM t_order WHERE to_date(create_time, 'yyyy-mm-dd') = '2019-01-01';
 | DROP INDEX idx_name                                                                         |                          |
 | SELECT DISTINCT * FROM tbl_name WHERE col1 = ?                                              |                          |
 | SELECT COUNT(DISTINCT col1) FROM tbl_name                                                   |                          |
+| SELECT subquery_alias.col1 FROM (select tbl_name.col1 from tbl_name where tbl_name.col2=?) subquery_alias                                                   |                                         |
 
 ### 不支持的SQL
 
@@ -117,12 +118,12 @@ SELECT * FROM t_order WHERE to_date(create_time, 'yyyy-mm-dd') = '2019-01-01';
 | ------------------------------------------------------------------------------------------ | -------------------------- |
 | INSERT INTO tbl_name (col1, col2, ...) VALUES(1+2, ?, ...)                                 | VALUES语句不支持运算表达式   |
 | INSERT INTO tbl_name (col1, col2, ...) SELECT col1, col2, ... FROM tbl_name WHERE col3 = ? | INSERT .. SELECT           |
-| SELECT COUNT(col1) as count_alias FROM tbl_name GROUP BY col1 HAVING count_alias > ?       | HAVING                     |
 | SELECT * FROM tbl_name1 UNION SELECT * FROM tbl_name2                                      | UNION                      |
 | SELECT * FROM tbl_name1 UNION ALL SELECT * FROM tbl_name2                                  | UNION ALL                  |
-| SELECT * FROM ds.tbl_name1                                                                 | 包含schema                 |
 | SELECT SUM(DISTINCT col1), SUM(col1) FROM tbl_name                                         | 详见DISTINCT支持情况详细说明 |
 | SELECT * FROM tbl_name WHERE to_date(create_time, 'yyyy-mm-dd') = ?                        | 会导致全路由                |
+| (SELECT * FROM tbl_name)                                                                   | 暂不支持加括号的查询                              |
+| SELECT MAX(tbl_name.col1) FROM tbl_name                                                    | 查询列是函数表达式时,查询列前不能使用表名;若查询表存在别名,则可使用表的别名|
 
 ## DISTINCT支持情况详细说明
 
@@ -149,5 +150,4 @@ SELECT * FROM t_order WHERE to_date(create_time, 'yyyy-mm-dd') = '2019-01-01';
 
 | SQL                                                                                         | 不支持原因                          |
 | ------------------------------------------------------------------------------------------- |----------------------------------- |
-| SELECT SUM(DISTINCT col1), SUM(col1) FROM tbl_name                                          | 同时使用普通聚合函数和DISTINCT聚合函数 |
-
+| SELECT SUM(DISTINCT tbl_name.col1), SUM(tbl_name.col1) FROM tbl_name                        | 查询列是函数表达式时,查询列前不能使用表名;若查询表存在别名,则可使用表的别名 |

docs/document/content/features/sharding/use-norms/sql.en.md

@@ -110,6 +110,7 @@ When shardingColumn in expressions and functions, ShardingSphere will use full r
 | DROP INDEX idx_name                                                                         |                                         |
 | SELECT DISTINCT * FROM tbl_name WHERE col1 = ?                                              |                                         |
 | SELECT COUNT(DISTINCT col1) FROM tbl_name                                                   |                                         |
+| SELECT subquery_alias.col1 FROM (select tbl_name.col1 from tbl_name where tbl_name.col2=?) subquery_alias                                                   |                                         |
 
 ### Unsupported SQL
 
@@ -117,12 +118,12 @@ When shardingColumn in expressions and functions, ShardingSphere will use full r
 | ------------------------------------------------------------------------------------------ | --------------------------------------------------- |
 | INSERT INTO tbl_name (col1, col2, ...) VALUES(1+2, ?, ...)                                 | VALUES clause does not support operation expression |
 | INSERT INTO tbl_name (col1, col2, ...) SELECT col1, col2, ... FROM tbl_name WHERE col3 = ? | INSERT .. SELECT                                    |
-| SELECT COUNT(col1) as count_alias FROM tbl_name GROUP BY col1 HAVING count_alias > ?       | HAVING                                              |
 | SELECT * FROM tbl_name1 UNION SELECT * FROM tbl_name2                                      | UNION                                               |
 | SELECT * FROM tbl_name1 UNION ALL SELECT * FROM tbl_name2                                  | UNION ALL                                           |
-| SELECT * FROM ds.tbl_name1                                                                 | Contain schema                                      |
 | SELECT SUM(DISTINCT col1), SUM(col1) FROM tbl_name                                         | See DISTINCT availability detail                    |
 | SELECT * FROM tbl_name WHERE to_date(create_time, 'yyyy-mm-dd') = ?                        | Lead to full routing                                |
+| (SELECT * FROM tbl_name)                                                                   | Contain brackets                              |
+| SELECT MAX(tbl_name.col1) FROM tbl_name                                                    | The select function item contains TableName. Otherwise, If this query table had an alias, then TableAlias could work well in select function items. |
 
 ## DISTINCT Availability Explanation
 
@@ -149,4 +150,4 @@ When shardingColumn in expressions and functions, ShardingSphere will use full r
 
 | SQL                                                | Reason                                                                             |
 | -------------------------------------------------- | ---------------------------------------------------------------------------------- |
-| SELECT SUM(DISTINCT col1), SUM(col1) FROM tbl_name | Use normal aggregation function and DISTINCT aggregation function in the same time |
\ No newline at end of file
+| SELECT SUM(DISTINCT tbl_name.col1), SUM(tbl_name.col1) FROM tbl_name | The select function item contains TableName. Otherwise, If this query table had an alias, then TableAlias could work well in select function items. |
\ No newline at end of file

shardingsphere-features/shardingsphere-sharding/shardingsphere-sharding-rewrite/src/test/resources/sharding/select.xml

@@ -27,6 +27,28 @@
         <output sql="SELECT * FROM t_account_0 WHERE account_id = 100" />
     </rewrite-assertion>
 
+    <rewrite-assertion id="select_with_sum_fun">
+        <input sql="SELECT SUM(DISTINCT account_id), SUM(account_id) FROM t_account WHERE account_id = 100" />
+        <output sql="SELECT SUM(DISTINCT account_id), SUM(account_id) FROM t_account_0 WHERE account_id = 100" />
+    </rewrite-assertion>
+
+    <rewrite-assertion id="select_with_avg_fun">
+        <input sql="SELECT AVG(DISTINCT t.account_id), account_id FROM t_account t WHERE account_id = 100" />
+        <output sql="SELECT AVG(DISTINCT t.account_id), account_id FROM t_account_0 t WHERE account_id = 100" />
+    </rewrite-assertion>
+
+    <rewrite-assertion id="select_with_having">
+        <input sql="SELECT COUNT(account_id) as count_alias FROM t_account GROUP BY amount HAVING count_alias > ?" parameters="1"/>
+        <output sql="SELECT COUNT(account_id) as count_alias , amount AS GROUP_BY_DERIVED_0 FROM t_account_0 GROUP BY amount ORDER BY amount ASC  HAVING count_alias > ?" parameters="1"/>
+        <output sql="SELECT COUNT(account_id) as count_alias , amount AS GROUP_BY_DERIVED_0 FROM t_account_1 GROUP BY amount ORDER BY amount ASC  HAVING count_alias > ?" parameters="1"/>
+    </rewrite-assertion>
+
+    <rewrite-assertion id="select_with_schema">
+        <input sql="SELECT * FROM db.t_account" />
+        <output sql="SELECT * FROM db.t_account_0"/>
+        <output sql="SELECT * FROM db.t_account_1"/>
+    </rewrite-assertion>
+
     <rewrite-assertion id="select_with_subquery" db-type="MySQL">
         <input sql="SELECT * FROM (select t_account.account_id from t_account where t_account.account_id=?) a WHERE account_id = 100" parameters="100" />
         <output sql="SELECT * FROM (select t_account_0.account_id from t_account_0 where t_account_0.account_id=?) a WHERE account_id = 100" parameters="100" />