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Posted to notifications@shardingsphere.apache.org by "FlyingZC (via GitHub)" <gi...@apache.org> on 2023/07/13 06:29:52 UTC
[GitHub] [shardingsphere] FlyingZC opened a new issue, #27078: Support parsing Oracle CREATE OR sql
FlyingZC opened a new issue, #27078:
URL: https://github.com/apache/shardingsphere/issues/27078
# Background
Hi community,
This issue is for #26878.
ShardingSphere parser engine helps users parse a SQL to get the AST (Abstract Syntax Tree) and visit this tree to get SQLStatement (Java Object). Currently, we are planning to enhance the support for Oracle SQL parsing in ShardingSphere.
More details:
https://shardingsphere.apache.org/document/current/en/reference/sharding/parse/
# Task
This issue is to support more oracle sql parse, as follows:
```sql
CREATE OR REPLACE VIEW hr_po_tab OF XMLType
ELEMENT "PurchaseOrder" WITH OBJECT ID DEFAULT AS
SELECT XMLtransform(OBJECT_VALUE, x.col1)
FROM purchaseorder p, xsl_tab x;
```
```sql
CREATE OR REPLACE VIEW time_c AS
(SELECT * FROM edge_time
UNION ALL
SELECT '2001-13_2', 2001, 5, '2001-05', 13, '2001-13', null, null,
8 -- <gid_of_mon>
FROM DUAL);
```
```sql
CREATE OR REPLACE VIEW v1 AS
SELECT *
FROM employees
WHERE employee_id < 150;
CREATE OR REPLACE VIEW v2 AS
SELECT v1.employee_id employee_id, departments.department_id department_id
FROM v1, departments
WHERE v1.department_id = departments.department_id;
SELECT /*+ NO_MERGE(v2) INDEX(v2.v1.employees emp_emp_id_pk)
FULL(v2.departments) */ *
FROM v2
WHERE department_id = 30;
```
```sql
CREATE OR REPLACE VIEW v_emp_job_history AS
SELECT e1.first_name, e1.last_name, j.job_id, sum(e2.salary) total_sal
FROM employees e1, (SELECT * FROM employees e3) e2, job_history j
WHERE e1.employee_id = e2.manager_id
AND e1.employee_id = j.employee_id
AND e1.hire_date = j.start_date
AND e1.salary = ( SELECT max(e2.salary)
FROM employees e2
WHERE e2.department_id = e1.department_id )
GROUP BY e1.first_name, e1.last_name, j.job_id
ORDER BY total_sal;
```
```sql
CREATE OR REPLACE view v_orders AS
SELECT l.product_id, SUM(l.quantity*unit_price) revenue,
o.order_id, o.customer_id
FROM orders o, order_items l
WHERE o.order_id = l.order_id
GROUP BY l.product_id, o.order_id, o.customer_id;
```
# Process
1. First confirm that this is a correct oracle sql syntax, if not please ignore;
2. Compare SQL definitions in Oficial SQL Doc and ShardingSphere SQL Doc;
3. If there is any difference in ShardingSphere SQL Doc, please correct them by referring to the Official SQL Doc;
4. Run mvn install the current_file_module;
5. Check whether there are any exceptions. If indeed, please fix them. (Especially xxxVisitor.class);
6. Add new corresponding SQL case in SQL Cases and expected parsed result in Expected Statment XML;
7. Run SQLParserParameterizedTest to make sure no exceptions.
# Relevant Skills
1. Master JAVA language
2. Have a basic understanding of Antlr `g4` file
3. Be familiar with Oracle SQLs
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[GitHub] [shardingsphere] github-actions[bot] commented on issue #27078: Support parsing Oracle CREATE OR sql
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] commented on issue #27078:
URL: https://github.com/apache/shardingsphere/issues/27078#issuecomment-1676080816
There hasn't been any activity on this issue recently, and in order to prioritize active issues, it will be marked as stale.
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Re: [I] Support parsing Oracle CREATE OR sql [shardingsphere]
Posted by "terrymanu (via GitHub)" <gi...@apache.org>.
terrymanu closed issue #27078: Support parsing Oracle CREATE OR sql
URL: https://github.com/apache/shardingsphere/issues/27078
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Re: [I] Support parsing Oracle CREATE OR sql [shardingsphere]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] commented on issue #27078:
URL: https://github.com/apache/shardingsphere/issues/27078#issuecomment-1784213169
There hasn't been any activity on this issue recently, and in order to prioritize active issues, it will be marked as stale.
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Re: [I] Support parsing Oracle CREATE OR sql [shardingsphere]
Posted by "ClaireLytt (via GitHub)" <gi...@apache.org>.
ClaireLytt commented on issue #27078:
URL: https://github.com/apache/shardingsphere/issues/27078#issuecomment-5092765132
Hi, please assign this issue to me. Thank you!
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