(GLUE-1905) ABAP Based Extractor

To create the ABAP based extractor

1. In Extractor Workbench.
2. Right-click on ABAP to Storage and choose Create Extractor.
3. Specify the following parameters:
   
   • Extractor name – technical name of the extractor.
   • Description – description of the extractor.
   • Extractor type – this value is predefined, for this type of extractor select the ABAP to Storage extractor.
   • Source type 
   • Target type
     
4. Fill in following entries:

• Result Structure – SAP table/structure that represents source structure of data
• Target Table HIVE – target GLUE table
• Input Structure – SAP table/structure, that will serve as a filter for class, that is providing data - similar to select-options
• Class Name – SAP class, that implements interface /DVD/GL_EXT_IF_ABAP

Please note: that Target Structure section is automatically generated and its content depends on the defined Input Structure.

3. Save and Activate.

4. The next step is to create a Variant.

Technical details

To use a Class as a Data provider, the class must implement interface /DVD/GL_EXT_IF_ABAP.

The interface contains 3 methods:

• INIT - serves for initialization of required information for extraction process; input parameter is select-options from variant
• HAS_DATA - signalizes extraction process, if there are still some data to extract
• GET_NEXT_PACKAGE - provides data that will be replicated to HADOOP