Select data from sap tables DDG
Display SAP table details
DDGENTAB - DD: Structure of Gentab (Mass Activation Program)
DDGR_NAME - DD: Names of DD objects for graphic algorithms
DDGR_OBJ - DD: Object lists for graphic algorithms
DDGR_REL - DD: Relations list for graphic algorithms
DDGR_RELIX - DD: Relation over object index for graphic algorithms
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