SQL query has strange behavior on sql server 2014

Hi All,
I have a very weird situation where a front end entity framework query (cannot be modified easily) made up of SQL views that are used in subquery format. It generally runs within few seconds but there are times in the day when query just keep on going and
sometimes start spitting results very slowly and at other times no result but keep on executing. Sysprocesses table shows sos_scheduler_yield wait type when query is running and not returning results. This behavior started on the query since the database was
upgraded (migrated) from sql 2005 clustered enterprise instance to a new 2014 Enterprise clustered instance on a very powerful server. This query is used by a batch process and what I have found that if we rebuild indexes on the database (takes
only 2 mins) , the query appears to be returning results as expected. No other solution is working at the moment. The query had no issue on older sql 2005 instance and I have tested it their a few times. I am assuming it is a SQL 2014 related issue and found
a fix on CU 5 for sos_scheduler_yield but it has not fixed the issue. At this point SQL 2014 is on latest CU 6 as of last week and index rebuilt wis the only viable work around to get the query going without interruption.
Has anyone faced this issue on SQl 2014 or have some suggestions I can try. I can reproduce this error on at least two instances on SQL 2014. I have even tried setting max dop at server level to 1 and at half the total processors cores but to no avail. There
is a 750GB memory on the box.
Thanks
dba60
dba60

First of all, SOS_SCHEDULER_YIELD has nothing to do with the query as such. SQL Server has a co-operative operating system, which means that processes voluntary yields to permit other threads to executes. This sends them to the wait state SOS_SCHEDULER_YIELD.
If there is no other process executing, they are directly back in the game.
The problems with your query is most likely to be an issue with the query plan. It is not uncommon to see plan changes when you move from one version of SQL Server to another because of changes in the optimizer.
As Satish says, SQL 2014 has a new cardinality estimator (CE), which certainly can change the game. Check the compatibility level of the database. If the compat level is 120, you are using the new CE, else you are using the old one.
If the level is 120, the first check is to change it to 110 to see if this has any effect.
But in the end you will have to work more with the query. Analyse it to see if it can be improved by adding indexes. You say said that this query generated by Entity Framework. Unfortunately, this is an indiciation of that the query is not the best and could
serve from a rewrite.
The ultimate rescue would be to freeze the plan when it runs well. I have some text about this here:
http://www.sommarskog.se/query-plan-mysteries.html#planguides
Erland Sommarskog, SQL Server MVP, [email protected]

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PLAN_TABLE_OUTPUT
SQL_ID 6vbpbvfburc4x
SELECT COUNT(SECURE_PROGRAMS.PROG_ID) FROM SECURE_PROGRAMS,HRW_EC_ACTIVE_ITEM, (SELECT ACTIVE_ITEM_ID
FROM TABLE(CAST(:B1 AS HRW_EC_ACTIVE_ITEM_ID_TABLE_T)) ) T WHERE HRW_EC_ACTIVE_ITEM.ACTIVE_ITEM_ID =
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Plan hash value: 25280318
| Id | Operation                           | Name                      | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT                    |                           |       |       |   730 (100)|          |
|   1 | SORT AGGREGATE                     |                           |     1 |    57 |            |          |
|   2 |   HASH JOIN                         |                           |   116 | 6612 |   730   (1)| 00:00:09 |
|   3 |    COLLECTION ITERATOR PICKLER FETCH|                           |       |       |            |          |
|   4 |    NESTED LOOPS                     |                           | 48596 | 2610K|   705   (1)| 00:00:09 |
|   5 |     INDEX RANGE SCAN                | SECURE_PROGRAMS_IDX_04    |     4 |    76 |     2   (0)| 00:00:01 |
|   6 |     INDEX RANGE SCAN                | HRW_EC_ACTIVE_ITEM_IDX_03 | 10984 |   386K|   176   (1)| 00:00:03 |
Query Block Name / Object Alias (identified by operation id):
   1 - SEL$62A3881B
   5 - SEL$62A3881B / SECURE_PROGRAMS@SEL$1
   6 - SEL$62A3881B / HRW_EC_ACTIVE_ITEM@SEL$1
SQL_ID 6vbpbvfburc4x
SELECT COUNT(SECURE_PROGRAMS.PROG_ID) FROM SECURE_PROGRAMS,HRW_EC_ACTIVE_ITEM, (SELECT ACTIVE_ITEM_ID
FROM TABLE(CAST(:B1 AS HRW_EC_ACTIVE_ITEM_ID_TABLE_T)) ) T WHERE HRW_EC_ACTIVE_ITEM.ACTIVE_ITEM_ID =
T.ACTIVE_ITEM_ID AND HRW_EC_ACTIVE_ITEM.SPROG_ID = SECURE_PROGRAMS.PROG_ID AND
SECURE_PROGRAMS.STUDENT_RESOURCES_URL = :B2
Plan hash value: 219484150
| Id | Operation                            | Name                      | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT                     |                           |       |       | 4845 (100)|          |
|   1 | SORT AGGREGATE                      |                           |     1 |    57 |            |          |
|   2 |   HASH JOIN                          |                           | 2066 |   115K| 4845   (2)| 00:00:59 |
|   3 |    INDEX RANGE SCAN                  | SECURE_PROGRAMS_IDX_04    |    79 | 1501 |     2   (0)| 00:00:01 |
|   4 |    HASH JOIN                         |                           | 3284 |   121K| 4843   (2)| 00:00:59 |
|   5 |     COLLECTION ITERATOR PICKLER FETCH|                           |       |       |            |          |
|   6 |     INDEX FAST FULL SCAN             | HRW_EC_ACTIVE_ITEM_IDX_03 | 1373K|    47M| 4803   (2)| 00:00:58 |
Query Block Name / Object Alias (identified by operation id):
   1 - SEL$62A3881B
   3 - SEL$62A3881B / SECURE_PROGRAMS@SEL$1
   6 - SEL$62A3881B / HRW_EC_ACTIVE_ITEM@SEL$1
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SELECT COUNT(SECURE_PROGRAMS.PROG_ID) FROM SECURE_PROGRAMS,HRW_EC_ACTIVE_ITEM, (SELECT ACTIVE_ITEM_ID
FROM TABLE(CAST(:B1 AS HRW_EC_ACTIVE_ITEM_ID_TABLE_T)) ) T WHERE HRW_EC_ACTIVE_ITEM.ACTIVE_ITEM_ID =
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SECURE_PROGRAMS.STUDENT_RESOURCES_URL = :B2
Plan hash value: 740005210
| Id | Operation                           | Name                      | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT                    |                           |       |       | 4845 (100)|          |
|   1 | SORT AGGREGATE                     |                           |     1 |    57 |            |          |
|   2 |   HASH JOIN                         |                           |     7 |   399 | 4845   (2)| 00:00:59 |
|   3 |    COLLECTION ITERATOR PICKLER FETCH|                           |       |       |            |          |
|   4 |    HASH JOIN                        |                           | 2992 |   160K| 4821   (2)| 00:00:58 |
|   5 |     INDEX RANGE SCAN                | SECURE_PROGRAMS_IDX_04    |    33 |   627 |     2   (0)| 00:00:01 |
|   6 |     INDEX FAST FULL SCAN            | HRW_EC_ACTIVE_ITEM_IDX_03 | 1373K|    47M| 4803   (2)| 00:00:58 |
Query Block Name / Object Alias (identified by operation id):
   1 - SEL$62A3881B
   5 - SEL$62A3881B / SECURE_PROGRAMS@SEL$1
   6 - SEL$62A3881B / HRW_EC_ACTIVE_ITEM@SEL$1
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SELECT COUNT(SECURE_PROGRAMS.PROG_ID) FROM SECURE_PROGRAMS,HRW_EC_ACTIVE_ITEM, (SELECT ACTIVE_ITEM_ID
FROM TABLE(CAST(:B1 AS HRW_EC_ACTIVE_ITEM_ID_TABLE_T)) ) T WHERE HRW_EC_ACTIVE_ITEM.ACTIVE_ITEM_ID =
T.ACTIVE_ITEM_ID AND HRW_EC_ACTIVE_ITEM.SPROG_ID = SECURE_PROGRAMS.PROG_ID AND
SECURE_PROGRAMS.STUDENT_RESOURCES_URL = :B2
Plan hash value: 1418188916
| Id | Operation                           | Name                      | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT                    |                           |       |       | 2136 (100)|          |
|   1 | SORT AGGREGATE                     |                           |     1 |    57 |            |          |
|   2 |   HASH JOIN                         |                           |     3 |   171 | 2136   (1)| 00:00:26 |
|   3 |    NESTED LOOPS                     |                           | 1103 | 60665 | 2111   (1)| 00:00:26 |
|   4 |     INDEX RANGE SCAN                | SECURE_PROGRAMS_IDX_04    |    12 |   228 |     2   (0)| 00:00:01 |
|   5 |     INDEX RANGE SCAN                | HRW_EC_ACTIVE_ITEM_IDX_03 | 10984 |   386K|   176   (1)| 00:00:03 |
|   6 |    COLLECTION ITERATOR PICKLER FETCH|                           |       |       |            |          |
Query Block Name / Object Alias (identified by operation id):
   1 - SEL$62A3881B
   4 - SEL$62A3881B / SECURE_PROGRAMS@SEL$1
   5 - SEL$62A3881B / HRW_EC_ACTIVE_ITEM@SEL$1      Thanks,
Brian

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RSRT Performance Display SQL - Query has variables

I have a query with mandatory variables on Year and Period, which are built into my RKF's. I am trying to run the query via RSRT to see the SQL, but I keep getting error, variables must have values.....I tried creating variant in RSRT, but it goes to some odd screen.

I do not get a prompt screen. I go to RSRT, Enter Query Name, next I Select Performance Info tab, then hit "Display SQL" button. I get a message: Specify a value for variable Posting Period (Single Value Entry, Mandatory)
I never get a prompt. I am on BI 7.

How Can I Make This Sql Query To Load Data Correctly (sql server)?

Hi guys
I have a datagridview where the third column is a custom column with all days
of a month. It takes data with a query who distinct the column Improve.
Here is the code :
Private Sub fill_impro()
dgImprove.Rows.Clear()
Try
Dim i As Integer = 0
Dim query As String = "SELECT Improve,Price,Active,Idate FROM (SELECT Improve,Price,Active,Idate, ROW_NUMBER() OVER (PARTITION BY Price ORDER BY Price) AS rn FROM tblImprove) tmp WHERE rn = 1"
cmd = New SqlCommand(query, clsMSSQL.con)
myDR = cmd.ExecuteReader
If myDR.HasRows Then
While myDR.Read
dgImprove.Rows.Add()
dgImprove.Rows(i).Cells(0).Value = myDR.GetDecimal(myDR.GetOrdinal("Price"))
dgImprove.Rows(i).Cells(1).Value = myDR.GetString(myDR.GetOrdinal("Improve"))
Dim myday As Integer = DatePart(DateInterval.Day, myDR.GetValue(myDR.GetOrdinal("Idate")))
dgImprove.Rows(i).Cells(myday + 1).Value = myDR.GetInt32(myDR.GetOrdinal("Active"))
i = i + 1
End While
End If
myDR.Close()
Catch ex As Exception
MsgBox(ex.Message, MsgBoxStyle.Critical, "Σφάλμα")
End Try
End Sub
And here is the result :
http://i60.tinypic.com/28gwf83.jpg
The column Active value is 1.
The problem is that column Active values are missing (red values in image).
How can i fix that ?
Thanks in advance

try like this
Dim Price As Decimal
Dim improve As String = String.Empty
While myDR.Read
Dim myday As Integer = DatePart(DateInterval.Day, myDR.GetValue(myDR.GetOrdinal("Idate")))
If Not (myDR.GetDecimal(myDR.GetOrdinal("Price")) = Price And myDR.GetString(myDR.GetOrdinal("Improve")) = improve) Then
i += 1
dgimprove.Rows.Add()
dgimprove.Rows(i).Cells(0).Value = myDR.GetDecimal(myDR.GetOrdinal("Price"))
dgimprove.Rows(i).Cells(1).Value = myDR.GetString(myDR.GetOrdinal("Improve"))
Price = myDR.GetDecimal(myDR.GetOrdinal("Price"))
improve = myDR.GetString(myDR.GetOrdinal("Improve"))
End If
dgimprove.Rows(i).Cells(myday + 1).Value = myDR.GetInt32(myDR.GetOrdinal("Active"))
End While
and change your sql statement to just
SELECT Improve,Price,Active,Idate FROM tblImprove WHERE Active = 1

WRH$** tables, Need to know by which user SQL Query has been executed

Hi,
From the AWR data (WRH$) tables , I need to know how many sql code is using some specific indexes, I found that information by using the mentioned code. but I need to find out by which user this code has been executed ( not the PARSING_SCHEMA_NAME). Can someone please help me, how can I get that info?
select a.operation,a.OBJECT_OWNER,a.OBJECT_NAME ,dbms_lob.substr(b.SQL_TEXT,4000,1) from WRH$_SQL_PLAN a,WRH$_SQLTEXT b
where a.operation='INDEX' and a.SNAP_ID=b.SNAP_ID and a.SQL_ID=b.SQL_ID and a.OBJECT_NAME in (
'I_CUSTORDER_STAT_CHG_DTM',
'I_LINE_ITEM_STAT_CHG_DTM',
'I_SHOPCART_MODIFIEDDTM',
'I_VISITOR_CART_UPDATED_DTM',
'R_ORDER_LOG_EVENT_DTM',
'I_LI_STATUS_HISTORY_EVENT_DTM',
'I_SHOPPING_CART_CREATEDDTM',
'I_VISITOR_CART_CREATED_DTM',
'I_LINE_ITEM_CREATED_DTM_FTM')

872903 wrote:
Hi,
From the AWR data (WRH$) tables , I need to know how many sql code is using some specific indexes, I found that information by using the mentioned code. but I need to find out by which user this code has been executed ( not the PARSING_SCHEMA_NAME). Can someone please help me, how can I get that info?
select a.operation,a.OBJECT_OWNER,a.OBJECT_NAME ,dbms_lob.substr(b.SQL_TEXT,4000,1) from WRH$_SQL_PLAN a,WRH$_SQLTEXT b
where a.operation='INDEX' and a.SNAP_ID=b.SNAP_ID and a.SQL_ID=b.SQL_ID and a.OBJECT_NAME in (
'I_CUSTORDER_STAT_CHG_DTM',
'I_LINE_ITEM_STAT_CHG_DTM',
'I_SHOPCART_MODIFIEDDTM',
'I_VISITOR_CART_UPDATED_DTM',
'R_ORDER_LOG_EVENT_DTM',
'I_LI_STATUS_HISTORY_EVENT_DTM',
'I_SHOPPING_CART_CREATEDDTM',
'I_VISITOR_CART_CREATED_DTM',
'I_LINE_ITEM_CREATED_DTM_FTM')consider enabling AUDIT SELECT FROM TABLE upon which INDEX is based.

Sql ddl replication strange behavior with create table

Hello, I create the following table on my oracle DB server:
CREATE TABLE test (a NUMBER(*,0) DEFAULT 0 NOT NULL,
b DATE DEFAULT SYSDATE NOT NULL));
ALTER TABLE test
ADD CONSTRAINT pk_test PRIMARY KEY (a);
when I deploy and sync, on the mobile I have the table well created, but the not null and default sysdate on the b column on are not set. It's null with no default values.
Have anyone an idea ?
Thank's for reply.

We do not replicate not null or default values on Oracle Lite 5.0.2.x. This functionality will be available in the 10g release of Oracle Lite.
- Junius

How Can I Make This Sql Query To Load Data Correctly (sql server 2014)?

Hi guys
I have a datagridview where the third column is a custom column with all days
of a month. It takes data with a query who distinct the column Improve.
SELECT Improve,Price,Active,Idate FROM (SELECT Improve,Price,Active,Idate, ROW_NUMBER() OVER (PARTITION BY Improve ORDER BY Improve) AS rn FROM tblImprove) tmp WHERE rn = 1
And here is the result :
http://i60.tinypic.com/28gwf83.jpg
The column Active value is 1.
The problem is that column Active values are missing (red values in image).
How can i fix that ?
Thanks in advance

Hi,
Maybe you can try below code, I have changed the order by of the row_number(). Therefore it will sort on the date, and you will get the first date icm with improve cell. If this is not what you are looking for, please explain what the output should be.
SELECT Improve,Price,Active,Idate
FROM
SELECT Improve,Price,Active,Idate, ROW_NUMBER() OVER (PARTITION BY Improve ORDER BY ldate) AS rn
FROM tblImprove
) tmp WHERE rn = 1
Regards,
Reshma
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SQL query has strange behavior on sql server 2014

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