Configure the sort order to ensure that the Data Integration Service passes sorted data to the Joiner transformation.
To configure the sort order, use one of the following methods:
Use sorted flat files. When the flat files contain sorted data, verify that the order of the sort columns match in each source file.
Use sorted relational data. Use sorted ports in the relational data object to sort columns from the source database. Configure the order of the sorted ports the same in each relational data object.
Use a Sorter transformation to sort relational or flat file data. Place a Sorter transformation in the master and detail pipelines. Configure each Sorter transformation to use the same order of the sort key ports and the sort order direction.
If you pass unsorted or incorrectly sorted data to a Joiner transformation configured to use sorted data, the mapping run fails. The Data Integration Service logs the error in the log file.