ABAP Select data from SAP table RCJ_NZTAB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RCJ_NZTAB 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 RCJ_NZTAB. 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 RCJ_NZTAB 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_RCJ_NZTAB TYPE STANDARD TABLE OF RCJ_NZTAB,
      WA_RCJ_NZTAB TYPE RCJ_NZTAB,
      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: <RCJ_NZTAB> TYPE RCJ_NZTAB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCJ_NZTAB
*  INTO TABLE @DATA(IT_RCJ_NZTAB2).
*--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_RCJ_NZTAB INDEX 1 INTO DATA(WA_RCJ_NZTAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCJ_NZTAB>-PSPNR = 1.
<RCJ_NZTAB>-AUFNR = 1.
<RCJ_NZTAB>-AUFPL = 1.
<RCJ_NZTAB>-EEINH = 1.
<RCJ_NZTAB>-EWANF = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCJ_NZTAB-EWFIN, sy-vline,
  WA_RCJ_NZTAB-INDEX, sy-vline,
  WA_RCJ_NZTAB-KTEXT, sy-vline,
  WA_RCJ_NZTAB-NTANF, sy-vline,
  WA_RCJ_NZTAB-NTEND, sy-vline,
  WA_RCJ_NZTAB-PEINH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCJ_NZTAB 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_RCJ_NZTAB 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_RCJ_NZTAB INTO WA_RCJ_NZTAB.


*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.

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_RCJ_NZTAB-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCJ_NZTAB-PSPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AUFNR, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_AUFNR_OUTPUT'
  EXPORTING
    input =                      WA_RCJ_NZTAB-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCJ_NZTAB-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RCJ_NZTAB-EEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCJ_NZTAB-EEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RCJ_NZTAB-PEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCJ_NZTAB-PEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field IEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RCJ_NZTAB-IEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCJ_NZTAB-IEINH.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

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

TYPES: BEGIN OF T_RCJ_NZTAB_STR, 
PSPNR TYPE STRING,
AUFNR TYPE STRING,
AUFPL TYPE STRING,
EEINH TYPE STRING,
EWANF TYPE STRING,
EWFIN TYPE STRING,
INDEX TYPE STRING,
KTEXT TYPE STRING,
NTANF TYPE STRING,
NTEND TYPE STRING,
PEINH TYPE STRING,
SELKZ TYPE STRING,
ISTRT TYPE STRING,
IENDE TYPE STRING,
IEINH TYPE STRING,
FLGLC TYPE STRING,
FLG_READ TYPE STRING,
FLG_ENQ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCJ_NZTAB_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_RCJ_NZTAB_STR-PSPNR sy-vline 
WA_RCJ_NZTAB_STR-AUFNR sy-vline 
WA_RCJ_NZTAB_STR-AUFPL sy-vline 
WA_RCJ_NZTAB_STR-EEINH sy-vline 
WA_RCJ_NZTAB_STR-EWANF sy-vline 
WA_RCJ_NZTAB_STR-EWFIN sy-vline 
WA_RCJ_NZTAB_STR-INDEX sy-vline 
WA_RCJ_NZTAB_STR-KTEXT sy-vline 
WA_RCJ_NZTAB_STR-NTANF sy-vline 
WA_RCJ_NZTAB_STR-NTEND sy-vline 
WA_RCJ_NZTAB_STR-PEINH sy-vline 
WA_RCJ_NZTAB_STR-SELKZ sy-vline 
WA_RCJ_NZTAB_STR-ISTRT sy-vline 
WA_RCJ_NZTAB_STR-IENDE sy-vline 
WA_RCJ_NZTAB_STR-IEINH sy-vline 
WA_RCJ_NZTAB_STR-FLGLC sy-vline 
WA_RCJ_NZTAB_STR-FLG_READ sy-vline 
WA_RCJ_NZTAB_STR-FLG_ENQ sy-vline      INTO ld_text SEPARATED BY SPACE.

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