Synchronize after merge

Synchronize after merge

Description The Synchronize After Merge transform can be used in conjunction with the Merge Rows (Diff) pipeline transform to insert/update/delete database fields based on the Merge Rows (Diff) output. The Merge Rows (diff) pipeline transform appends a Flag column to each row, with a value of "identical", "changed", "new" or "deleted". This flag column is then used by the Synchronize After Merge pipeline transform to carry out updates/inserts/deletes on a connection table.	Supported Engines Hop Engine Spark Flink Dataflow
Hop Engine
Spark
Flink
Dataflow

Options

General Tab

Option	Description
Transform name	Name of the transform.
Connection	The database connection to which data is written
Target schema	The name of the Schema for the table to which data is written. This is important for data sources that allow for table names with periods in them.
Target table	Name of the table in which you want to do the insert/update/delete.
Commit size	The number of rows to change before running a commit.
Use batch update
Tablename is defined in a field
Key Lookup table	Allows you to specify a list of field values and comparators. You can use the following comparators: =, <>, <, ⇐, >, >=, LIKE, BETWEEN, IS NULL, IS NOT NULL
Update Fields	Allows you to specify all fields in the table you want to insert/update including the keys. Avoid updates on certain fields (e.g. primary keys or non-null constrained fields) by specifying N in the update column.
SQL button	Click SQL to generate the SQL to create the table and indexes for correct operation.

Advanced Tab

Option	Description	Default value from the Merge Rows (diff) transform
Operation fieldname	This is a required field. This field is used by the transform to obtain an operation flag for the current row.	"flagfield"
Insert when value equal	Specify the value of the Operation fieldname which signifies that an Insert should be carried out.	"new"
Update when value equal	Specify the value of the Operation fieldname which signifies that an Update should be carried out.	"changed"
Delete when value equal	Specify the value of the Operation fieldname which signifies that a Delete should be carried out.	"deleted"
Perform lookup	Performs a lookup when deleting or updating. If the lookup field is not found, then an exception is thrown. This option can be used as an extra check if you wish to check updates/deletes prior to their execution.	Not applicable

Last updated 2025-09-04 18:23:15 +0200