NNULLCHK SAP (Control String for Checking NOT NULL Flags) Structure details

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Structure field list including key, data, relationships and ABAP select examples

NNULLCHK is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "Control String for Checking NOT NULL Flags" Information within sap ABAP programs.

This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately.

i.e. DATA: wa_NNULLCHK TYPE NNULLCHK.

The NNULLCHK table consists of various fields, each holding specific information or linking keys about Control String for Checking NOT NULL Flags data available in SAP. These include NNLONGFLD (Is DD check to be executed/how?).. 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. .

Delivery Class:
Display/Maintenance via tcode SM30: Display/Maintenance Allowed but with Restrictions
SAP enhancement categories: Not classified

SAP NNULLCHK structure fields - Full list of fields found in SAP data dictionary

Key field

Non-key field

How do I retrieve data from SAP structure NNULLCHK using ABAP code?

As NNULLCHK is a database structure and not a table it does not store any data in the SAP data dictionary. The ABAP SELECT statement is therefore not appropriate and can not be performed on NNULLCHK as there is no data to select.

How to access SAP table NNULLCHK

Within an ECC or HANA version of SAP you can also view further information about NNULLCHK and the data within it using relevant transactions such as

SE11 (ABAP Dictionary Maintenance)
SM30 (Maintain Table Data)
SE80 (Object Navigator)
SE16 (Data Browser).

Search for further information about these or an SAP related objects