SSIS Merge Join

 

I am working on an ssis package and i find an problem while using the merge join for merging 2 OLEDB Data sources .
 
data source 1 is : - The table formed my an sal server comand , that out put is given to a multicast since i want to sare that output amoung 2o other tables.

So the the left input for the merge join is OLEDB source , which contains direct data from source table
 
I am usong Inner join on one column
 
The problem is i am not getting the expected rows as out put of merge .
 
I tried to join the two tables in sqlserver query window and i am getting expected result
 
What could be the problem
 
The first table is
 
Reservations.ReservationManual
 
second table is  Out put of the following query
 

Select Distinct B.ReservationID as R

from Property.Main A ,Reservations.Reservations B ,Reservations.ReservationRooms C

Where

A.propertyID = B.PropertyId And

C.ReservationID = B.ReservationID And

getdate() >=C.Until +A.ReservationOffLineDays
 
 
 
 
i am not getting the expected result here in SSIS package merge join
 
But if i try to execute the following in query editer in management studio i am getting the expected result !!
 
 

declare @temp as table

(ResID Varchar(50)

)

Insert into @temp

(ResID)

Select Distinct B.ReservationID as R

from Property.Main A ,Reservations.Reservations B ,Reservations.ReservationRooms C

Where

A.propertyID = B.PropertyId And

C.ReservationID = B.ReservationID And

getdate() >=C.Until +A.ReservationOffLineDays

select * from Reservations.ReservationManual A , @temp b

Where A.reservationID = b.resID



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Complex SSIS Lookup/Merge Join Using NK And Dates

I had this (what seems to be a) simple question asked today and I'm afraid I didn't like my answer. Does anyone know the proper answer to this one:

Any ideas on how I can constrain a lookup or merge join based on the dimension row's effective and expired dates so three criteria are needed as follows:
1. DataStagingSource.ModifyDate < DataWarehouseDimension.RowExpiredDate AND
2. DataStagingSource.ModifyDate >= DataWarehouseDimension.RowEffectiveDate AND
3. DataStagingSource.NaturalKey = DataWarehouseDimension.NaturalKey

 -- Brian

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Problem Using Merge Join Transformation In Sql Server 2005(SSIS)

Hi,
 I am pretty new to SSIS. I am transferring some rows from 2 source tables to 1 destination table.
 The 2 source tables have 1000 rows.They act as the 2 inputs to a merge join transformation where i perform the join between the 2 tables based on a couple of fields. But for some reason the output of  the merge join gives me about 1018 rows .Shouldnt the destination also have only 1000 rows?
 How do i solve tis problem?
 
Thanks in advance
Sat
 

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SSIS: JOINING TABLES FROM TWO SERVERS - BETTER WAY THAN SORT -&&> MERGE JOIN?

Setup:

I need to run an Insert query which pulls data from a table located on server A database AA Table AAA conditional on (or JOINED with) Table BBB in database BB sever B. In SQL 2000 it could be done as:

From Server A:
sp_addlinkedserver B
INSERT dbo.ResultsTable
SELECT SourceTable.* FROM  B.BB.dbo.BBB SourceTable
INNER JOIN A.AA.dbo.AAA ConditionTable  ON SourceTable.RecID = ConditionTable.RecID
sp_dropserver B


In SSIS one of the possible solutions is to use a package which does the following:
OPEN A + OPEN B-> SORT A + SORT B->MERGE JOIN A and B->OUTPUT RESULT

The problem with this approach is that it's extremely slow for large datafiles (50M records each)

Questions:

1) In the procedure above could the SORT step be avoided?
2) Is there another approach to run cross-servers JOIN in SSIS?

Thank you

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'Left Outer Merge Join' Failing To Join Valid Row

Scenario:

OLEDB source 1
SELECT ...
      ,[MANUAL DCD ID]  <-- this column set to sort order = 1
     ...
  FROM [dbo].[XLSDCI] ORDER BY [MANUAL DCD ID] ASC


OLEDB source 2
SELECT ...
      ,[Bo Tkt Num] <-- this column set to sort order = 1
     ...
  FROM ....[dbo].[FFFenics] ORDER BY [Bo Tkt Num] ASC

These two tasks are followed immediately by a MERGE JOIN

All columns in source1 are ticked, all column in source2 are ticked, join key is shown above.
join type is left outer join (source 1 -> source 2)

result of source1 (..dcd column)
...
4-400-8000119
4-400-8000120
4-400-8000121
4-400-8000122 <--row not joining
4-400-8000123
4-400-8000124
...


result of source2 (..tkt num column)
...
4-400-1000118
4-400-1000119
4-400-1000120
4-400-1000121
4-400-1000122 <--row not joining
4-400-1000123
4-400-1000124
4-400-1000125
...

All other rows are joining as expected.
Why is it failing for this one row?

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Merge Join (Full Outer Join) Never Finishes.

I have a merge join (full outer join) task in a data flow. The left input comes from a flat file source and then a script transformation which does some custom grouping. The right input comes from an oledb source. The script transformation output is asynchronous (SynchronousInputID=0). The left input has many more rows (200,000+) than the right input (2,500). I run it from VS 2005 by right-click/execute on the data flow task. The merge join remains yellow and the task never finishes. I do see a row count above the flat file destination that reaches a certain number and seems to get stuck there. When I test with a smaller file on the left it works OK. Any suggestions?

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How Would You Convert A Hash Join Into A Merge Join?

I read that merge joins work a lot faster than hash joins.  How would you convert a hash join into a merge join?  (Referring to output on Execution Plan diagrams.)
THANKS

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Super Join - Is Merge Join The Answer?

Is there a way to do a super-table join ie two table join with no matching criteria? I am pulling in a sheet from XL and joining to a table in SQLServer. The join should read something like €œfor every row in the sheet I need that row and a code from a table. 100 rows in the sheet merged with 10 codes from the table = 1000 result rows.

This is the simple sql (no join on the tables):

select 1.code, 2.rowdetail
from tblcodes 1, tblelements 2

But how to do this in SSIS?

Thanks - Ken

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Merge Join = 99%

I have got a query in which a merge join is 99% of the cost .... and I am confused ... is not merge join supposed to be the fastest ??? Anyone seen this before ???

Any ideas why this could be happening ... and sorry ... do not ask me to post the code coz I will not be able to ...

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Merge Join

All,
 
I need to use Merge Join transformation to join two sources. One is from a PIVOT transformation and one of the output columns is ISSORTED, the other is from an OLE DB Source using a query. The Merge Join transformation requires both input source have to be sorted. I cannot find the ISSORTED property on the OLE DB Source!!
I tried to use Derived/ copy transformations but cannot find the property also. How can set the OLE query sorted in order to use the MergeJoin?
 
Thanks a lot

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Merge Join - HELP

Hi,

I have a SQL Statatment:


SELECT *  FROM TABLE1 AS A
    JOIN TABLE2 AS B
      ON A.X= B.X
    AND A.Y= B.Y
When i execute this code in sql server returns 549 lines. I created a package with two oledb sources one for each table, sorted the tables with fields X and Y after placed a Merge Join with the fields:
A.Y join B.Y order 1
 A.X  join B.X  order 2
both fields with the Join Key checked
But my package return 411 lines.
What's happened?? :(
When a i have the code:
SELECT A.X, A.Y, B.X, B.Y
  FROM TABLE1 AS A
    JOIN TABLE2 AS B
      ON A.X= B.X
When i did the join only one field SSIS worked fine, sql server returns 622 and SSIS returns 622 lines.
Please help-me...
Thanks,
André

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Merge Join

 

Hello,
I have a Merge Join transformation and when i sort values in OLEDB source the merge join fails, but if i use a sort transformation it works! Why??
Best regards,
Fred

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When Should We Use Merge Join?

 

Hi, all experts here,
 
Any advices for when will be a better way of using Merge join instead of other options?
 
Thank you very much and I am looking forward to hearing from you shortly.
 
Best regards,
 
 

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Merge Join Help

I am new to this SSIS.
I have a simple join query like this
select a.id from tbl_a a, tbl_b b where a.id = b.id and I want insert the result to my temp table.
the query results is 1500 rows.
but when I use merge join in SSIS, it only inserts to my temp table 4 rows.
I use inner join and I already set the IsSorted to true and specify the sort position for the columns in both source tables
In tbl_a, there are one million rows, in tbl_b, there are 2000 rows.
I don't know why the merge join cannot work out my task.Is there other way that I can just run this simple join query in SSIS to copy the data?
Please help, thanks in advance.

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Merge Join

Hi, folks:

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Merge Join

Hello all,

I have a package where I use merge join for two sorted inputs and the output is stored in a raw file.

In another package, the raw file from above package is again merge joined with another sorted input. Now my question is....do we need to sort again the raw file from first package? or is it OK to set the isSorted property to True and define the sort keys?

 

Thank you.

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How To Join/merge Tables

Hi guys! I'm trying to figure out how to join 3 tables, but I can't seem to find a solution. What I want to do is to put table 1, table 2 and table 3 into table_merged.
table_merged = table 1 + table 2 + table 3
 Is it possible to merge tables even if they have different fields?
 
Please help.
Onegai shimasu... 
 
Thanks in advance!

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About Merge Join Component

Hi, I'm using a Merge Join Component of Inner Join type to retrieve from the right pipeline some records to append to the ones coming from left pipeline according to the join citerias defined on the compnent.
Is there any way to know which are the records coming from the left pipeline that doesn't match the join criterias?
In the following I'll try to do an axample.
 
LF pipeline:
Column0           Column1           Column2
1                      aaaa                 aa11
2                      bbbb                 bb11
3                      cccc                 cc11
4                      dddd                 dd11
 
RT pipeline:
ColumnA          ColumnB         
1                      aa22
4                      dd22
 
On exiting from the MergeJoin, defining €œColumn0€? for LT  as join key and  €œColumnA€? for RT and as output data all the columns of the LT pipeline and the only ColumnB from the RT pipeline it should be obtained the following records:
 
Column0           Column1           Column2           ColumnB         
1                      aaaa                 aa11                 aa22
4                      dddd                 dd11                 dd22
 
and the records from the LT pipeline:
2                      bbbb                 bb11
3                      cccc                 cc11
 
shouldn't go in the output from the Merge Join Component.
 
What I need to know is which are these last lines because I need to manage them.
Thanks!

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Merge Join Question

Hi, All,

 

  In the data flow of Intergration Service,  my understanding is that the "Merge Join" only does the "join", there is no way to input the "where" clause. If I need to input the the "Where" clause or selection criteria, how should I do it in Integration Service?

 

TIA,

 

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Merge Join Output Bug?

I've run into something that looks like a bug to me but I wanted to run it by the board:

Merge join 2 sorted tables.

Table1: ColumnA : Sort Order 1, ColumnB Sort Order 2

Table2 : ColumnA: Sort Order 1, ColumnB Sort Order 2, ColumnC not sorted

Merge Join the two tables on ColumnA and ColumnB...

Choose the following as output columns

A + B + C = works

C = works

A + C = works

B + C = NOT work.. error message: The column with the SortKeyPosition value of 0 is not valid. It should be 2. 


Basically if you choose one or more of the sorted columns in the output at least one of them has to be the column with Sort position 1 or you'll get that error. 

Is this a bug or intentional?  If you do not have sort column 1 in the output that output could no longer be considered sorted... so perhaps the error is related to that (instead of error I'd expect some warning about the sorting).  Interesting that it lets you choose C only becuase that also makes the output unsorted.

 

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Merge Join More Than 2 Tables

I need to take certain items of data from four different tables and out them into one table.

Unfortunately my source data's version of SQL does not support the LEFT JOIN keyword which has left me with a bit of a problem.

I saw the merge join in SSIS and used it to get data from two of the tables and stick them in the destination and it all worked fine.

That got me thinking, is it possible to create a second merge join transformation within the same data flow task for the remaining two tables and then join the output of both the merge joins to give me the data I need from all four tables in one output?  

 

 

 

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Merge Join Or Union All

Hi,

I am trying to normalize data using the unpivot transform. I have to unpivot using more than one key so I have a multicast feeding into two unpivot transforms then into a sort transform. This is where my problem starts - I have tried using a Merge Join (inner Join) transform but dont get the expected result.

My original data looks like this:






Pk_ID

Choice1

Choice2

Feedback1

Feedback2


10

a

b

x

y

After the mulitcast - unpivot - Merge Join, the expected result is: (pk_newID is an identity)






Pk_newID

fk_ID

Choice

Feedback


563

10

a

x


564

10

b

y

However with a Merge-Join (inner join on pk_ID) I get






Pk_newID

fk_ID

Choice

Feedback


563

10

a

x


564

10

a

y


565

10

b

x


566

10

b

y

Is the Merge Join transform not the right choice?

Thanks

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Merge Join Problem

I don't know if anyone is having this issue with merge join. I built a custom SCD to handle insert, update and delete records. So far I am having success with the delete but after I do a union all combining the updated and new rows, I merge them with the source. My proble is that is I have 10 records coming from the flow and I have say 30 records from the source, it will only load about half of these records. IBy the way, I am doing inner join. When I copy the two set of data and I manually join them, I get the result I expect. Is there something I am missing in the merge join configuration?

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More Merge Join Question

All,
 
I want to use Merge Join to join two sources, 
but the join condition should like this
 
and input1.servicedate <= input2.MonthFirstDay
and input2.MonthFirstDay <= getdate()
 
Does Merge Join support this or What€™s the best way to do it?
 
Thanks

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Possibly Merge Join Bug?

i'm merge joining 2 data sources, one is oracle and the other is excel...the problem is in the oracle source, it's a sql statement like:

select hdr.div_ord_no, hdr.mtr_no, hdr.prod_cd
from     qctrl_div_ord_header hdr,
 (select max(sub.eff_dt_from) min_eff_dt_from,    div_ord_no
 from qctrl_div_ord_header sub
  group by div_ord_no
 ) tmp
where    hdr.eff_dt_from = tmp.min_eff_dt_from
and  hdr.div_ord_no = tmp.div_ord_no

having that sql statement, merging will come out with 0 rows 

however, having a simple query like:

select hdr.div_ord_no, hdr.mtr_no, hdr.prod_cd
from     qctrl_div_ord_header hdr

merging will come out with 2 rows

you may think that the data in the first sql statement is not there for the merge, which causing the 0 rows, however, the data is there, i'm only joining by one column and definitely the data is there, the merge result should be 2 rows for both query statements

i believe this is a problem with SSIS, anyway around this?

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Merge Join Problem

Hello,
I've got a problem with the merge join operator.

I'm trying to Join two tables using a left outer join.

Here are my tables :

TABLE AGENT
AGENT_CODE; REGION_ID; COUNTRY_ID
AA;01;01;
BB;01;01;
CC;01;02;
CC;02;02;
DD;01;01;

600 records in this table.

TABLE DELEGUE
AGENT_CODE; FIRST_NAME; LAST_NAME
AA; Maradona;Diego;
BB; Maradona;Diego;
DD; Zidane;Zinedine;

145 records in this table.

This is what i expect in my left outer join:
AGENT_CODE; REGION_ID; COUNTRY_ID;FIRST_NAME; LAST_NAME
AA;01;01;Maradona;Diego;
BB;01;01;Maradona;Diego;
CC;01;02;NULL;NULL
CC;02;02;NULL;NULL;
DD;01;01;Zidane;Zinedine

600 records in the destination table, with only 145 Not null first_name and last_name



The
issorted property has been set to true in the 2 sources tables, the
numkeyscolumns property is set to 1, and the join keys are both checked.
When i execute the sql query using the editor in sql server, the result is good, i've got what i've expected.
But
when i run the dataflow, the destination has got 600 records, but the
columns FIRST_NAME and LAST_NAME are not null only 8 times, the 592
other lines are NULL.
Could someone explain to me why i lost 145-8=137 FIRST_NAME and 145-8=137 LAST NAME ?
Thank you in advance.

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Merge Join Transformation

Hi,
 
 i have 2 input files,those are sorted on account no field , i use to merge these 2 files data into 1 file.i took merge join trans.... with inner join but i didn't get the output fields ,plz help me regarding this issue.......

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Help Needed With Merge Join

I am trying to use the merge join example in the following link. To import new records only.
 
http://www.sqlis.com/311.aspx
 
The problem is that for some unkown reason the join is not woeking correctly. One of the records is incorrectly showing a NULL on the output. This would indicate that it would be a new record, but it is not it already exists in the new table.
 
I created a dummy table in SQL and executed the same join and I always get the right answer. What the heck could be wrong?
 
For example. Table A has 20 records  Table B has 3 records. Table B has the new records I want to import into Table A. The package runs corectly the first time, only importing the 3 new records. Then the next time the package runs it shows 1 of the 3 records as being new still, and tries to import the record causing a PK error. Adding a watch to the MERGE output shows that the one record has a NULL on the join.
 
Please help this is driving me nuts.
 

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Merge Join Comparison

 
I'm trying to compare two fields between two tables using a Merge Join that runs into a conditional. This conditional sorts mismatched rows from validated ones but its returning incorrect mismatches (which means the mismatch is actually a match).
 
TABLE1 has two DT_STR fields with length 16 and TABLE2 had two DT_STR fields with length 32.
 
I've used a data conversion component to lengthen the first table's fields to a length of 32 but there still seems to be incorrect mismatches. For example TABLE1 had "AAA" and "BBB" and this appeared as a mismatch. If I used Query Analyzer to check TABLE2 for this criteria it would exist (which means it IS a match).
 
Is there any way to view hidden characters (i.e. carriage returns, tabs) in those fields? I've tried using RTRIM in my SQL Query for both my data sources and they still don't match up.

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0xC0204006 In Merge Join Component

Hi,
I have data coming from 2 sources
 
Source 1 (EmpId, EmpName, Hiredate, Salary)
Source 2 (MgrId, MgrName, IsActive, Date_Started, Wages)

I am only concerned about 3 common fields (Name, Date and Wages)

I have joined EmpName with MgrName, Hiredate with Date_Started, but when I select Wages in correspondence to Salary, it shows me the following error

===================================

Error at Manager_Detail [Merge data with adjustments (Salary) [11668]]: The metadata for "input column "Wages" (13852)" does not match the metadata for the associated output column.

Error at Manager_Detail [Merge data with adjustments (Salary) [11668]]: Failed to set property "OutputColumnLineageID" on "input column "Wages" (13852)".

 (Microsoft Visual Studio)


All the datatypes are matching, but I dont know why this error occurs

Any help in this will sincerely be appreciated.

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Merge Join With Empty Inputs

Hi all,

Does anyone have suggestions for ways to deal with the chance that a merge join might receive empty inputs?

I've noticed that when this happens the transformation seems to hang.  I changed the MaxBuffersPerInput to zero and this seems to cure the problem but I'm not sure it's the best way to deal with it.

Would it be a good idea to test the row counts with a conditional split before such a join?

Cheers,

Andrew

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