ABAP Select data from SAP table RMSLA_HDH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMSLA_HDH
*  INTO TABLE @DATA(IT_RMSLA_HDH2).
*--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_RMSLA_HDH INDEX 1 INTO DATA(WA_RMSLA_HDH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMSLA_HDH>-MANDT = 1.
<RMSLA_HDH>-LABELID = 1.
<RMSLA_HDH>-AENNR = 1.
<RMSLA_HDH>-CHNGTIMSTMP = 1.
<RMSLA_HDH>-STATUS_OBJNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMSLA_HDH-STM_OBJNO, sy-vline,
  WA_RMSLA_HDH-USAGE_OBJNO, sy-vline,
  WA_RMSLA_HDH-CLA_OBJNO, sy-vline,
  WA_RMSLA_HDH-RATING, sy-vline,
  WA_RMSLA_HDH-VALIDITY_AREA, sy-vline,
  WA_RMSLA_HDH-SOURCE_INT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMSLA_HDH 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_RMSLA_HDH 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_RMSLA_HDH INTO WA_RMSLA_HDH.


*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 LABELID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMSLA_HDH-LABELID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMSLA_HDH-LABELID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMSLA_HDH-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMSLA_HDH-AENNR.
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_RMSLA_HDH_STR, 
MANDT TYPE STRING,
LABELID TYPE STRING,
AENNR TYPE STRING,
CHNGTIMSTMP TYPE STRING,
STATUS_OBJNO TYPE STRING,
STM_OBJNO TYPE STRING,
USAGE_OBJNO TYPE STRING,
CLA_OBJNO TYPE STRING,
RATING TYPE STRING,
VALIDITY_AREA TYPE STRING,
SOURCE_INT TYPE STRING,
VALID_FROM TYPE STRING,
VALID_TO TYPE STRING,
WEBUI_STATUS TYPE STRING,
AUTHGRP TYPE STRING,
FLG_LOC_RELEVANT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMSLA_HDH_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_RMSLA_HDH_STR-MANDT sy-vline 
WA_RMSLA_HDH_STR-LABELID sy-vline 
WA_RMSLA_HDH_STR-AENNR sy-vline 
WA_RMSLA_HDH_STR-CHNGTIMSTMP sy-vline 
WA_RMSLA_HDH_STR-STATUS_OBJNO sy-vline 
WA_RMSLA_HDH_STR-STM_OBJNO sy-vline 
WA_RMSLA_HDH_STR-USAGE_OBJNO sy-vline 
WA_RMSLA_HDH_STR-CLA_OBJNO sy-vline 
WA_RMSLA_HDH_STR-RATING sy-vline 
WA_RMSLA_HDH_STR-VALIDITY_AREA sy-vline 
WA_RMSLA_HDH_STR-SOURCE_INT sy-vline 
WA_RMSLA_HDH_STR-VALID_FROM sy-vline 
WA_RMSLA_HDH_STR-VALID_TO sy-vline 
WA_RMSLA_HDH_STR-WEBUI_STATUS sy-vline 
WA_RMSLA_HDH_STR-AUTHGRP sy-vline 
WA_RMSLA_HDH_STR-FLG_LOC_RELEVANT sy-vline      INTO ld_text SEPARATED BY SPACE.

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