D342L is a standard SAP Table which is used to store Table for long CUA objects data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The D342L table consists of various fields, each holding specific information or linking keys about Table for long CUA objects data available in SAP. These include STATUS (GUI status), TYPE (Type of Load), BLOCKNR (BIN4 data element for SYST), BLOBLG (BIN4 data element for SYST)... 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. .