ABAP Select data from SAP table ISCRSCTLGMAEXTNMRCPARAMTP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ISCRSCTLGMAEXTNMRCPARAMTP table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to ISCRSCTLGMAEXTNMRCPARAMTP. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the ISCRSCTLGMAEXTNMRCPARAMTP table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_ISCRSCTLGMAEXTNMRCPARAMTP TYPE STANDARD TABLE OF ISCRSCTLGMAEXTNMRCPARAMTP,
      WA_ISCRSCTLGMAEXTNMRCPARAMTP TYPE ISCRSCTLGMAEXTNMRCPARAMTP,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <ISCRSCTLGMAEXTNMRCPARAMTP> TYPE ISCRSCTLGMAEXTNMRCPARAMTP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ISCRSCTLGMAEXTNMRCPARAMTP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ISCRSCTLGMAEXTNMRCPARAMTP
  INTO TABLE IT_ISCRSCTLGMAEXTNMRCPARAMTP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISCRSCTLGMAEXTNMRCPARAMTP
*  INTO TABLE @DATA(IT_ISCRSCTLGMAEXTNMRCPARAMTP2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_ISCRSCTLGMAEXTNMRCPARAMTP INDEX 1 INTO DATA(WA_ISCRSCTLGMAEXTNMRCPARAMTP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ISCRSCTLGMAEXTNMRCPARAMTP ASSIGNING <ISCRSCTLGMAEXTNMRCPARAMTP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISCRSCTLGMAEXTNMRCPARAMTP>-KEY = 1.
<ISCRSCTLGMAEXTNMRCPARAMTP>-PARENT_KEY = 1.
<ISCRSCTLGMAEXTNMRCPARAMTP>-ROOT_KEY = 1.
<ISCRSCTLGMAEXTNMRCPARAMTP>-CREATEDBYUSER = 1.
<ISCRSCTLGMAEXTNMRCPARAMTP>-CREATIONDATETIME = 1.

ENDLOOP.

LOOP AT IT_ISCRSCTLGMAEXTNMRCPARAMTP INTO WA_ISCRSCTLGMAEXTNMRCPARAMTP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISCRSCTLGMAEXTNMRCPARAMTP-LASTCHANGEDBYUSER, sy-vline,
  WA_ISCRSCTLGMAEXTNMRCPARAMTP-LASTCHANGEDATETIME, sy-vline,
  WA_ISCRSCTLGMAEXTNMRCPARAMTP-CRSCTLGMAPPGEXTPARAMETERID, sy-vline,
  WA_ISCRSCTLGMAEXTNMRCPARAMTP-CRSCTLGMAPPGEXTPARAMETERDESC, sy-vline,
  WA_ISCRSCTLGMAEXTNMRCPARAMTP-CRSCTLGMAPPGEXTOBJECTPARAMTYPE, sy-vline,
  WA_ISCRSCTLGMAEXTNMRCPARAMTP-CRSCTLGMAPPGEXTPARAMUSEVALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISCRSCTLGMAEXTNMRCPARAMTP you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_ISCRSCTLGMAEXTNMRCPARAMTP TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_ISCRSCTLGMAEXTNMRCPARAMTP INTO WA_ISCRSCTLGMAEXTNMRCPARAMTP.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ISCRSCTLGMAEXTNMRCPARAMTP_STR, 
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
CRSCTLGMAPPGEXTPARAMETERID TYPE STRING,
CRSCTLGMAPPGEXTPARAMETERDESC TYPE STRING,
CRSCTLGMAPPGEXTOBJECTPARAMTYPE TYPE STRING,
CRSCTLGMAPPGEXTPARAMUSEVALUE TYPE STRING,
CRSCTLGMAPPGEXTPARAMNMRCVALUE TYPE STRING,
CRSCTLGMAPPGEXTPARAMNMRCDFLT TYPE STRING,
CRSCTLGMAPPGEXTPARAMSTRINGVAL TYPE STRING,
CRSCTLGMAPPGEXTPARAMSTRINGDFLT TYPE STRING,
CRSCTLGMAPPGEXTPARAMDATEVALUE TYPE STRING,
CRSCTLGMAPPGEXTPARAMDTEDFLTVAL TYPE STRING,
BRFFUNCTIONUUID TYPE STRING,
CRSCTLGMAPPGEXTPARAMISMAND TYPE STRING,
CHARACTERISTIC TYPE STRING,
ACTIVEUUID TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYCONSISTENCYSTATUS TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,
ISACTIVEENTITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-KEY sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-PARENT_KEY sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-ROOT_KEY sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-CREATEDBYUSER sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-CREATIONDATETIME sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-LASTCHANGEDBYUSER sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-LASTCHANGEDATETIME sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-CRSCTLGMAPPGEXTPARAMETERID sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-CRSCTLGMAPPGEXTPARAMETERDESC sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-CRSCTLGMAPPGEXTOBJECTPARAMTYPE sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-CRSCTLGMAPPGEXTPARAMUSEVALUE sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-CRSCTLGMAPPGEXTPARAMNMRCVALUE sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-CRSCTLGMAPPGEXTPARAMNMRCDFLT sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-CRSCTLGMAPPGEXTPARAMSTRINGVAL sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-CRSCTLGMAPPGEXTPARAMSTRINGDFLT sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-CRSCTLGMAPPGEXTPARAMDATEVALUE sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-CRSCTLGMAPPGEXTPARAMDTEDFLTVAL sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-BRFFUNCTIONUUID sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-CRSCTLGMAPPGEXTPARAMISMAND sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-CHARACTERISTIC sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-ACTIVEUUID sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-HASACTIVEENTITY sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-DRAFTENTITYCONSISTENCYSTATUS sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-DRAFTENTITYOPERATIONCODE sy-vline 
WA_ISCRSCTLGMAEXTNMRCPARAMTP_STR-ISACTIVEENTITY sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.