ABAP Select data from SAP table PLM_PS_MAINTAIN_NV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PLM_PS_MAINTAIN_NV
*  INTO TABLE @DATA(IT_PLM_PS_MAINTAIN_NV2).
*--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_PLM_PS_MAINTAIN_NV INDEX 1 INTO DATA(WA_PLM_PS_MAINTAIN_NV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PLM_PS_MAINTAIN_NV>-FLG_SEL = 1.
<PLM_PS_MAINTAIN_NV>-OBJNR = 1.
<PLM_PS_MAINTAIN_NV>-LOEKZ = 1.
<PLM_PS_MAINTAIN_NV>-VORNR = 1.
<PLM_PS_MAINTAIN_NV>-LTXA1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PLM_PS_MAINTAIN_NV-ARBEI, sy-vline,
  WA_PLM_PS_MAINTAIN_NV-ARBEH, sy-vline,
  WA_PLM_PS_MAINTAIN_NV-ARBPL, sy-vline,
  WA_PLM_PS_MAINTAIN_NV-LARNT, sy-vline,
  WA_PLM_PS_MAINTAIN_NV-NTANF, sy-vline,
  WA_PLM_PS_MAINTAIN_NV-NTEND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PLM_PS_MAINTAIN_NV 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_PLM_PS_MAINTAIN_NV 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_PLM_PS_MAINTAIN_NV INTO WA_PLM_PS_MAINTAIN_NV.


*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 NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_PLM_PS_MAINTAIN_NV-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PLM_PS_MAINTAIN_NV-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ARBEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PLM_PS_MAINTAIN_NV-ARBEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PLM_PS_MAINTAIN_NV-ARBEH.
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_PLM_PS_MAINTAIN_NV_STR, 
FLG_SEL TYPE STRING,
OBJNR TYPE STRING,
LOEKZ TYPE STRING,
VORNR TYPE STRING,
LTXA1 TYPE STRING,
ARBEI TYPE STRING,
ARBEH TYPE STRING,
ARBPL TYPE STRING,
LARNT TYPE STRING,
NTANF TYPE STRING,
NTEND TYPE STRING,
STTXT_INT TYPE STRING,
STTXT_EXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PLM_PS_MAINTAIN_NV_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_PLM_PS_MAINTAIN_NV_STR-FLG_SEL sy-vline 
WA_PLM_PS_MAINTAIN_NV_STR-OBJNR sy-vline 
WA_PLM_PS_MAINTAIN_NV_STR-LOEKZ sy-vline 
WA_PLM_PS_MAINTAIN_NV_STR-VORNR sy-vline 
WA_PLM_PS_MAINTAIN_NV_STR-LTXA1 sy-vline 
WA_PLM_PS_MAINTAIN_NV_STR-ARBEI sy-vline 
WA_PLM_PS_MAINTAIN_NV_STR-ARBEH sy-vline 
WA_PLM_PS_MAINTAIN_NV_STR-ARBPL sy-vline 
WA_PLM_PS_MAINTAIN_NV_STR-LARNT sy-vline 
WA_PLM_PS_MAINTAIN_NV_STR-NTANF sy-vline 
WA_PLM_PS_MAINTAIN_NV_STR-NTEND sy-vline 
WA_PLM_PS_MAINTAIN_NV_STR-STTXT_INT sy-vline 
WA_PLM_PS_MAINTAIN_NV_STR-STTXT_EXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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