ABAP Select data from SAP table H_RELMPLA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM H_RELMPLA
*  INTO TABLE @DATA(IT_H_RELMPLA2).
*--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_H_RELMPLA INDEX 1 INTO DATA(WA_H_RELMPLA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<H_RELMPLA>-MANDT = 1.
<H_RELMPLA>-INTRENO = 1.
<H_RELMPLA>-LOCHIER = 1.
<H_RELMPLA>-PLSUBDIVNO = 1.
<H_RELMPLA>-PLNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_H_RELMPLA-OBJNR, sy-vline,
  WA_H_RELMPLA-RESPONSIBLE, sy-vline,
  WA_H_RELMPLA-AUTHGRP, sy-vline,
  WA_H_RELMPLA-XPL, sy-vline,
  WA_H_RELMPLA-LOCSYS, sy-vline,
  WA_H_RELMPLA-XLOCHIER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_H_RELMPLA 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_H_RELMPLA 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_H_RELMPLA INTO WA_H_RELMPLA.


*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 ALPHA, internal->external for field PLSUBDIVNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_H_RELMPLA-PLSUBDIVNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_H_RELMPLA-PLSUBDIVNO.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_H_RELMPLA-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_H_RELMPLA-VALIDTO.
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_H_RELMPLA_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
LOCHIER TYPE STRING,
PLSUBDIVNO TYPE STRING,
PLNO TYPE STRING,
OBJNR TYPE STRING,
RESPONSIBLE TYPE STRING,
AUTHGRP TYPE STRING,
XPL TYPE STRING,
LOCSYS TYPE STRING,
XLOCHIER TYPE STRING,
XLOCHIERUPC TYPE STRING,
LOCITEM01 TYPE STRING,
LOCITEM02 TYPE STRING,
LOCITEM03 TYPE STRING,
LOCITEM04 TYPE STRING,
LOCITEM05 TYPE STRING,
LOCITEM06 TYPE STRING,
LOCITEM07 TYPE STRING,
LOCITEM08 TYPE STRING,
LOCITEM09 TYPE STRING,
VALIDTO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_H_RELMPLA_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_H_RELMPLA_STR-MANDT sy-vline 
WA_H_RELMPLA_STR-INTRENO sy-vline 
WA_H_RELMPLA_STR-LOCHIER sy-vline 
WA_H_RELMPLA_STR-PLSUBDIVNO sy-vline 
WA_H_RELMPLA_STR-PLNO sy-vline 
WA_H_RELMPLA_STR-OBJNR sy-vline 
WA_H_RELMPLA_STR-RESPONSIBLE sy-vline 
WA_H_RELMPLA_STR-AUTHGRP sy-vline 
WA_H_RELMPLA_STR-XPL sy-vline 
WA_H_RELMPLA_STR-LOCSYS sy-vline 
WA_H_RELMPLA_STR-XLOCHIER sy-vline 
WA_H_RELMPLA_STR-XLOCHIERUPC sy-vline 
WA_H_RELMPLA_STR-LOCITEM01 sy-vline 
WA_H_RELMPLA_STR-LOCITEM02 sy-vline 
WA_H_RELMPLA_STR-LOCITEM03 sy-vline 
WA_H_RELMPLA_STR-LOCITEM04 sy-vline 
WA_H_RELMPLA_STR-LOCITEM05 sy-vline 
WA_H_RELMPLA_STR-LOCITEM06 sy-vline 
WA_H_RELMPLA_STR-LOCITEM07 sy-vline 
WA_H_RELMPLA_STR-LOCITEM08 sy-vline 
WA_H_RELMPLA_STR-LOCITEM09 sy-vline 
WA_H_RELMPLA_STR-VALIDTO sy-vline      INTO ld_text SEPARATED BY SPACE.

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