Hi everybody,

today I want to leave a short note regarding of what is needed, in order to be able to develop for Acumatica ERP.

REQUIREMENTS FOR DEV MACHINE

Hello everybody,

today I want to document one hack that preserved me plenty of space on my hard drive.

Recently I've tried to make back up of production database and was shocked to see that it had almost 200 Gb on my hard drive.  So it made me wonder how can I have smaller backups. 

And here is the solution.

1. In Microsoft SQL Server Management Studio click on database, and choose new query
2. enter there following command: sp_configure 'backup compression default', 1
3. then this: reconfigure WITH OVERRIDE;

After such manipulations I've got back up that had only 27 Gb.

No Comments

Hello everybdoy,

today I want to write some notes about hierarchy research in ms sql database. 

Imagine you have following structure in your table 

TableWithParentChild:

id               |           rootID   |     some additional fields

1                |            1          |      ----

2                |            1          |      ----

3                |            2          |      ----

4                |            2          |      ----

5                |            2          |      ----

and image that you need to get info like who is below 1. 

for this purpose following sql can be useful:

-- wrap up tree selection into tvf
create function HierarchyFunction(@parentID int)
returns table
as
return
with tree
as
(select id,  rootID from TableWithParentChild
         where id = @parentID
         union all
         select p.id, p.rootID from TableWithParentChild as P
         join tree on tree.id = P.rootID
         and P.id != P.rootID
)
select * from tree

select p.* from  TableWithParentChild as p
join HierarchyFunction(1) as tree
on p.id = tree.id

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Hello everybody,

some MS SQL internals.

Imagine, you want to see what MS SQL cached. How you can do it? One of the ways is to look into sys.dm_exec_cached_plans. 

For example like this:

select * from sys.dm_exec_cached_plans

this code will return to you all what is cached in your MS-SQL database. Most probably result will puzzle you. What to do with all of it?

Take look at the screenshot :

the area of interest for us is column plan_handle. 

You can use it for another sql request. Like this:

select * from sys.dm_exec_query_plan(0x06000C002D51D1304021F8AE000000000000000000000000);

if you click at column with xml you'll see the following picture:

How to interpret those results? I hope to describe in one of other notes on my blog.

For now another question, how to see the text of cached value? 

You can do it with another sql 

for example like this:

select * from sys.dm_exec_sql_text(0x06000C002D51D1304021F8AE000000000000000000000000)

in the column text you'll see column text which will represent what MS SQL cached. In my case it is following text:

select [first name], [last name], dense_rank() over (order by [last name]) as rn from employees

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Hello everybody,

some sql notes:

dbcc freeproccache; this one will clean plan of cached of sql.

Another note of how to find Sql code and plan by id from dm_exec_cached_plans

create function SqlAndPlan(@handle varbinary(max))

returns table

as

return select sql.text, cp.usecounts,cp.cacheobjtype,

cp.objtype, cp.size_in_bytes,

qp.query_plan

 from

 sys.dm_exec_sql_text(@handle) as sql cross join

 sys.dm_exec_query_plan(@handle) as qp

 join sys.dm_exec_cached_plans as cp

 on cp.plan_handle = @handle;

then you can use it in the following way:

 select * from SqlAndPlan(0x06650D007852A00B40613C82000000000000000000000032)

And in order to see sql and plan simultanously you can use following view:

create view PlanCache

as

select sp.* from sys.dm_exec_cached_plans   as cp

cross apply SqlAndPlan(cp.plan_handle) as sp

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Few days ago I faced following challenge. SQL profiler gave me ugly SQL, which was unreadable for my eyes.

For example like this:

exec sp_executesql N'SELECT APAddress.AddressID, APAddress.VendorID, APAddress.VendorAddressID, APAddress.IsDefaultAddress, APAddress.RevisionID, APAddress.AddressLine1, APAddress.AddressLine2, APAddress.AddressLine3, APAddress.City, APAddress.CountryID, APAddress.State, APAddress.PostalCode, APAddress.IsValidated, APAddress.tstamp, APAddress.CreatedByID, APAddress.CreatedByScreenID, APAddress.CreatedDateTime, APAddress.LastModifiedByID, APAddress.LastModifiedByScreenID, APAddress.LastModifiedDateTime FROM APAddress APAddress WHERE (APAddress.CompanyID = 2) AND  ( APAddress.AddressID = @P0) ORDER BY APAddress.AddressID /* admin@AP.30.40.00 */',N'@P0 int',@P0=-2147483647

If you can read it, congratulations, you are genius and I'm envy of you so you can stop reading further. But if you are just programmer as me, then the next step is the following:

1. remove exec sp_executesql 

2. In some editor find and replace @P0 with value -2147483647

3. remove tail /* admin@AP.30.40.00 */',N'@P0 int',@P0=-2147483647

4. Navigate in your browser to http://www.dpriver.com/pp/sqlformat.htm

5. Copy/Paste in window and choose format mssql

6. Press format SQL.

Compare previous sql with the following:

SELECT apaddress.addressid,
       apaddress.vendorid,
       apaddress.vendoraddressid,
       apaddress.isdefaultaddress,
       apaddress.revisionid,
       apaddress.addressline1,
       apaddress.addressline2,
       apaddress.addressline3,
       apaddress.city,
       apaddress.countryid,
       apaddress.state,
       apaddress.postalcode,
       apaddress.isvalidated,
       apaddress.tstamp,
       apaddress.createdbyid,
       apaddress.createdbyscreenid,
       apaddress.createddatetime,
       apaddress.lastmodifiedbyid,
       apaddress.lastmodifiedbyscreenid,
       apaddress.lastmodifieddatetime
FROM   apaddress APAddress
WHERE  ( apaddress.companyid = 2 )
       AND ( apaddress.addressid = -2147483647 )
ORDER  BY apaddress.addressid 

IMHO the second option is easier to read.

4 Comments

• Tim Rodman said 2 years ago

  Nice tip. I didn't know about that website.
  
  I use the SQL Prompt plug-in from Red Gate which installs as a menu in SQL Management Studio. You can also format SQL using this tool.

• docotor said 2 years ago

  Nice tool. IMHO even better then web site. But according to http://www.red-gate.com/products/sql-development/sql-prompt/
  
  "SQL Prompt starts at $369 per user" For now I'm not ready to pay to redgate such amount

• Tim Rodman said 2 years ago

  I agree, it's a little pricey, especially if you can't get your company to pay for it.
  
  It does save time when writing code because it auto-completes columns, tables, even table joins for you. But, if you're just looking for a formatting tool, the website works great.

• anonymous said 2 years ago

  Freeware:
  Notepad++ has an add-in called "Poor Man's Sql Formatter"
  
  http://www.architectshack.com/PoorMansTSqlFormatter.ashx