ESH_HDB_CONSTR is a standard SAP Table which is used to store Constraints for Application-Table Based Connector Nodes data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The ESH_HDB_CONSTR table consists of various fields, each holding specific information or linking keys about Constraints for Application-Table Based Connector Nodes data available in SAP. These include LOGSYS (Logical system), OBJECT_TYPE (Object Type), NODE_NAME (Node Name), CONSTRAINT_KEY (Constraint Key)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .