I am trying to realize some mappings as supposed in this answer. I created a mapping, which reads from a table in which a date for incremental load is stored. After that I set a mapping variable to pass this date value to the next mapping. In the Post-session on success variable assignment the mapping variable is stored in a workflow variable and passed to the next mapping.
Here is the mapping to read the date value and store it in the mapping variable. The value is stored in the variable in the expression, the port is an output, which is linked to a dummy target. This target simply writes it in a flat file.
The port expression is SETVARIABLE($$LOAD_FROM_DATE,LOAD_DATE).
My problem is that the value is read correctly, but it is not persisted in the mapping variable. It is always falling back on the date default value. Where is my mistake?
So you basically need to calculate a value from one mapping and use it in the second? If so, I have implemented something similar and it works fine for me. I have the port where I set variable (RESULT_LOAD in your case) value marked as a variable port. In the workflow you will be defining a variable to capture the variable value from mapping, mark it as persistent so that the value is stored in the repository after each run.
Related
Does anyone know of a way to access a global variables initial value?
I know you can access it's current value through:
pm.environment.get("variable-key");
I am working on a pre-request script that would benefit from accessing an initial value so that I could dynamically set it's current value.
In the current version of POSTMAN which is version v.7.3.3 setting value in environment variable change both values Initial and Current.
But answer to your question.
There is one way to resolve your problem:
Store the initial value in some variable before setting new value in an environment variable, So you will have initial value in the stored variable and current value in the environment variable.
I have a source schema in which a particular record is optional and in the source message instance the record does not exist. I need to map this record to destination record, scenario goes like if the source record doesn't exist, need to map a default value 0 to destination nodes. and If it does exists , need to pass the source node values as it is (followed by few arithmetic operations).
I have tried using various combinations of functoids like logical existence followed by value mapping,record count ,string existence,etc. Also tried using c# within scripting functoid and also xslt , nothing works.its very tough to deal with mapping non existing records. I have several records on top of this record which are mapped just fine and they do exists. having trouble only with this one.No matter how many combination of c# and xslt code i write , it feels like scripting functoid will never accept a non existence record or node link. Mind you that this record if exists ,can repeat multiple times.
Using BizTalk2013r2.
If the record doesn't exist (record is not coming, not even as < record/>) you can use this simple combination of Functoids.
Link the record to Logical Existence, if exist it will be sent by the top Value Mapping. If doesn't exit the second condition will be true and the zero will be sent from the value mapping in the bottom.
I am new to "Rapid miner" tool. There are two data set in my process. What I want to do is, generate a process which does the following:
To create this process should use Generate Attribute, Append and type conversion operators in RapidMiner
The first data set has a car name attribute, whereas the second data set has a name attribute. name should be renamed to car name.
The second data set has an additional other attribute which is not present in the first data set. Update the first data set to add an additional other attribute, with a default value of 1. This attribute should also have a type of Integer.
Append the modified second data set to the modified first data set
Export the new data to a new excel spreadsheet
I found the solution. Hope it will help for others
Please use below process flow
http://i.stack.imgur.com/omfDe.png
I have two tables in different databases. In a table A is the data, in the other table B are information for incremental load of the data from the first table. I want to load from table B and store the date of the last successful load from table A in a mapping variable $$LOAD_DATE. To achieve this, I read a date from table B and use the SETVARIABLE() function in a expression to set the $$LOAD_DATE variable. The port in which I do this is marked as output and writes into a dummy flat file. I only read on row of this source!
Then I use this $$LOAD_DATE variable in the Source Filter of the Source Qualifier of table A to only load new records which are younger than the date stored in the $$LOAD_DATE variable.
My problem is that I am not able to set the $$LOAD_DATE variable correctly. It is always the date 1753-1-1-00.00.00, which is the default value for mapping variables of the type date/time.
How do I solve this? How can I store a date in that variable and use it later in a Source Qualifiers source filter? Is it even possible?
EDIT: Table A has too much records to read them all and filter them later. This would be to expensive, so they have to be filtered at source filter level.
Yes, it's possible.
In the first map you have to initialize the variable, like this:
In first session configuration you have to define the Post-session on success variable assignment:
The second map (with your table A) will get the variable after this configuration of the session in Pre-session variable assignment:
It will work.
It is not possible to set a mapping variable and use it's value somewhere else in the same run, because, the variable is actually set when the session completes.
If you really want to implement it using mapping variables you have to create two mappings, one for setting the mapping variable and another for actual incremental load. You can pass a mapping variable value from one session to another in a workflow using a workflow variable. https://stackoverflow.com/a/26849639/2626813
Other solutions could be to use a lookup on B and a filter after that.
You can also write some scripts to query table B and modify the parameter file with the latest $LOAD_DATE value prior to executing the mapping.
Since we're having two different DBs, use two sessions. Get values in the first one and pass the parameters to the second one.
Workflow generates three files (header, detail, trailer) which I combine via post-session command. There are two variables which are set in my mapping, which I want to use in the post-session command like so:
cat header1.out detail1.out trailer1.out > OUTPUT_$(date +%Y%m%d)_$$VAR1_$$VAR2.dat
But this doesn't work and the values are empty, so I get OUTPUT_20151117__.dat.
I've tried creating workflow variables and assigning them via pre-session variable assignment, but this doesn't work either.
What am I missing? Or was this never going to work?
Can you see the values assigned to those variables on the session log or do they appear empty as well?
Creating workflow variables is what I'd try, but you need to assign the values with the post-session variable assignment.
Basically, you store values in a variable in your mapping and pass the values up to the workflow after the session succeeded. Here is how you can achieve that:
Define a Workflow variables $$VAR1 and $$VAR2
Define the variables in your mapping, but chose different names! So i.e. $$M_VAR1 and $$M_VAR2
In your mapping, assign the values to your mapping variables through the functions SetVariable(var as char, value as data type)
In your session, select Post-session on success variable assignment.
In step 4, the current value from $$M_VAR1 (mapping variable) is stored in your workflow variable $$VAR1 and can then be used in the workflow in command tasks like you asked.
A few notes:
I'm not 100% sure if the variable assignment is exectured before the post-session command. If the command is executed first, you could execute your command tasks in an external command task after your session.
Pre-Session variable assignment is used if you pass a value from a workflow variable down to a mapping variable. You can use this if your variables $$VAR1 or $$VAR2 are used inside another mapping and need to be initialized at the beginning.