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Posted to notifications@shardingsphere.apache.org by "FlyingZC (via GitHub)" <gi...@apache.org> on 2023/11/24 07:06:39 UTC
[I] Support parsing SQL Server SELECT candidate_name,SSN sql [shardingsphere]
FlyingZC opened a new issue, #29154:
URL: https://github.com/apache/shardingsphere/issues/29154
# Background
Hi community.
This issue is for #29149.
The ShardingSphere SQL parser engine helps users to parse SQL to create the AST (Abstract Syntax Tree) and visit the AST to get SQLStatement (Java Object). Currently, we are planning to enhance the support for `SQL Server` SQL parsing in ShardingSphere.
More details:
https://shardingsphere.apache.org/document/current/en/reference/sharding/parse/
# Task
This issue is to support more `SQL Server` sql parsing, as follows:
```sql
SELECT candidate_name,SSN
FROM candidates
WHERE CONTAINS(candidate_resume, '"SQL Server"') AND candidate_division = 'DBA'
```
[link](https://learn.microsoft.com/zh-cn/sql/relational-databases/search/full-text-search?view=sql-server-ver16)
```sql
SELECT [s_tst].[session_id],
[database_name] = DB_NAME (s_tdt.database_id),
[s_tdt].[database_transaction_begin_time],
[sql_text] = [s_est].[text]
FROM sys.dm_tran_database_transactions [s_tdt]
INNER JOIN sys.dm_tran_session_transactions [s_tst] ON [s_tst].[transaction_id] = [s_tdt].[transaction_id]
INNER JOIN sys.dm_exec_connections [s_ec] ON [s_ec].[session_id] = [s_tst].[session_id]
CROSS APPLY sys.dm_exec_sql_text ([s_ec].[most_recent_sql_handle]) AS [s_est]
```
[link](https://learn.microsoft.com/zh-cn/troubleshoot/sql/database-engine/performance/understand-resolve-blocking)
```sql
SELECT tst.session_id, [database_name] = db_name(s.database_id)
, tat.transaction_begin_time
, transaction_duration_s = datediff(s, tat.transaction_begin_time, sysdatetime())
, transaction_type = CASE tat.transaction_type WHEN 1 THEN 'Read/write transaction'
WHEN 2 THEN 'Read-only transaction'
WHEN 3 THEN 'System transaction'
WHEN 4 THEN 'Distributed transaction' END
, input_buffer = ib.event_info, tat.transaction_uow
, transaction_state = CASE tat.transaction_state
WHEN 0 THEN 'The transaction has not been completely initialized yet.'
WHEN 1 THEN 'The transaction has been initialized but has not started.'
WHEN 2 THEN 'The transaction is active - has not been committed or rolled back.'
WHEN 3 THEN 'The transaction has ended. This is used for read-only transactions.'
WHEN 4 THEN 'The commit process has been initiated on the distributed transaction.'
WHEN 5 THEN 'The transaction is in a prepared state and waiting resolution.'
WHEN 6 THEN 'The transaction has been committed.'
WHEN 7 THEN 'The transaction is being rolled back.'
WHEN 8 THEN 'The transaction has been rolled back.' END
, transaction_name = tat.name, request_status = r.status
, tst.is_user_transaction, tst.is_local
, session_open_transaction_count = tst.open_transaction_count
, s.host_name, s.program_name, s.client_interface_name, s.login_name, s.is_user_process
FROM sys.dm_tran_active_transactions tat
INNER JOIN sys.dm_tran_session_transactions tst on tat.transaction_id = tst.transaction_id
INNER JOIN Sys.dm_exec_sessions s on s.session_id = tst.session_id
LEFT OUTER JOIN sys.dm_exec_requests r on r.session_id = s.session_id
CROSS APPLY sys.dm_exec_input_buffer(s.session_id, null) AS ib
```
[link](https://learn.microsoft.com/zh-cn/troubleshoot/sql/database-engine/performance/understand-resolve-blocking)
```sql
INSERT INTO #test SELECT 1
```
[link](https://learn.microsoft.com/zh-cn/troubleshoot/sql/database-engine/performance/understand-resolve-blocking)
```sql
INSERT INTO #test2 SELECT 1
```
[link](https://learn.microsoft.com/zh-cn/troubleshoot/sql/database-engine/performance/understand-resolve-blocking)
# Process
1. First confirm that this is a correct `SQL Server` sql syntax, if not please leave a message under the issue and ignore it;
2. Compare SQL definitions in Official 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 Statement 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 `SQL Server` SQLs
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Re: [I] Support parsing SQL Server SELECT candidate_name,SSN sql [shardingsphere]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] commented on issue #29154:
URL: https://github.com/apache/shardingsphere/issues/29154#issuecomment-1868586077
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 SQL Server SELECT candidate_name,SSN sql [shardingsphere]
Posted by "strongduanmu (via GitHub)" <gi...@apache.org>.
strongduanmu commented on issue #29154:
URL: https://github.com/apache/shardingsphere/issues/29154#issuecomment-1916025504
@TherChenYang Assigned.
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Re: [I] Support parsing SQL Server SELECT candidate_name,SSN sql [shardingsphere]
Posted by "TherChenYang (via GitHub)" <gi...@apache.org>.
TherChenYang commented on issue #29154:
URL: https://github.com/apache/shardingsphere/issues/29154#issuecomment-1916831019
@strongduanmu Thank you very much, PR has been submitted.
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Re: [I] Support parsing SQL Server SELECT candidate_name,SSN sql [shardingsphere]
Posted by "TherChenYang (via GitHub)" <gi...@apache.org>.
TherChenYang commented on issue #29154:
URL: https://github.com/apache/shardingsphere/issues/29154#issuecomment-1916000608
@FlyingZC This issue can be assigned to me.
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