support parser SQL Server SUBSTRING function

[TherChenYang]

Fixes #29155.

Changes proposed in this pull request:

• Adjust CONVERT method vistor number
• Fix LiteralExpressionSegment does not support null literals
• support SQL in 29155

Sql case :

INSERT INTO #NonExistentTable values (10)

SELECT s.ticket, s.customer, r.store  
FROM dbo.Sales AS s  
CROSS JOIN dbo.Returns AS r  
WHERE s.ticket = r.ticket AND  
s.type = 'toy' AND  
r.date = '2016-05-11'

SELECT tat.transaction_begin_time, getdate() AS 'current time', es.program_name, es.login_time, es.session_id, tst.open_transaction_count, eib.event_info
FROM sys.dm_tran_active_transactions tat
JOIN sys.dm_tran_session_transactions tst ON tat.transaction_id=tst.transaction_id
JOIN sys.dm_exec_sessions es ON tst.session_id=es.session_id 
CROSS APPLY sys.dm_exec_input_buffer(es.session_id, NULL) eib WHERE es.is_user_process = 1
ORDER BY tat.transaction_begin_time ASC

SELECT text, 'DBCC FREEPROCCACHE (0x' + CONVERT(VARCHAR (512), plan_handle, 2) + ')' AS dbcc_freeproc_command FROM sys.dm_exec_cached_plans
CROSS APPLY sys.dm_exec_query_plan(plan_handle)
CROSS APPLY sys.dm_exec_sql_text(plan_handle)
WHERE text LIKE '%person.person%'

SELECT ProductID, Name, ProductNumber
FROM [Production].[Product]
WHERE SUBSTRING(ProductNumber, 0, 4) =  'HN-'

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[strongduanmu]

LGTM, merged.

[strongduanmu]

Hi @TherChenYang, can you comment on the original issue? I will assign it to you.

[TherChenYang]

Hi @TherChenYang, can you comment on the original issue? I will assign it to you.

ok 👌🏻