ABAP Select data from SAP table /SAPAPO/LIMFIRMR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/LIMFIRMR 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 /SAPAPO/LIMFIRMR. 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 /SAPAPO/LIMFIRMR 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_/SAPAPO/LIMFIRMR TYPE STANDARD TABLE OF /SAPAPO/LIMFIRMR,
      WA_/SAPAPO/LIMFIRMR TYPE /SAPAPO/LIMFIRMR,
      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: </SAPAPO/LIMFIRMR> TYPE /SAPAPO/LIMFIRMR.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/LIMFIRMR
  INTO TABLE IT_/SAPAPO/LIMFIRMR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/LIMFIRMR
*  INTO TABLE @DATA(IT_/SAPAPO/LIMFIRMR2).
*--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_/SAPAPO/LIMFIRMR INDEX 1 INTO DATA(WA_/SAPAPO/LIMFIRMR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/LIMFIRMR ASSIGNING </SAPAPO/LIMFIRMR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/LIMFIRMR>-MANDT = 1.
</SAPAPO/LIMFIRMR>-ORDID = 1.
</SAPAPO/LIMFIRMR>-SCHEDNO = 1.
</SAPAPO/LIMFIRMR>-RELTYPE = 1.
</SAPAPO/LIMFIRMR>-ORDNO = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/LIMFIRMR INTO WA_/SAPAPO/LIMFIRMR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/LIMFIRMR-ITEMNO, sy-vline,
  WA_/SAPAPO/LIMFIRMR-LOGSY, sy-vline,
  WA_/SAPAPO/LIMFIRMR-MATID, sy-vline,
  WA_/SAPAPO/LIMFIRMR-LOCIDFR, sy-vline,
  WA_/SAPAPO/LIMFIRMR-LOCIDTO, sy-vline,
  WA_/SAPAPO/LIMFIRMR-CONFNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/LIMFIRMR 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_/SAPAPO/LIMFIRMR 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_/SAPAPO/LIMFIRMR INTO WA_/SAPAPO/LIMFIRMR.


*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 LOGSY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/LIMFIRMR-LOGSY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/LIMFIRMR-LOGSY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field DATI_REC_CHNG
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/LIMFIRMR-DATI_REC_CHNG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/LIMFIRMR-DATI_REC_CHNG.
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_/SAPAPO/LIMFIRMR_STR, 
MANDT TYPE STRING,
ORDID TYPE STRING,
SCHEDNO TYPE STRING,
RELTYPE TYPE STRING,
ORDNO TYPE STRING,
ITEMNO TYPE STRING,
LOGSY TYPE STRING,
MATID TYPE STRING,
LOCIDFR TYPE STRING,
LOCIDTO TYPE STRING,
CONFNO TYPE STRING,
CC_DATE TYPE STRING,
GI_TIME TYPE STRING,
GR_TIME TYPE STRING,
MAX_QUAN TYPE STRING,
ASSGN_QUAN TYPE STRING,
BASE_UOM TYPE STRING,
FLAG_USED TYPE STRING,
DATI_REC_CHNG TYPE STRING,
FLAG_REC_DELE TYPE STRING,
DISP_REC_USER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/LIMFIRMR_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_/SAPAPO/LIMFIRMR_STR-MANDT sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-ORDID sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-SCHEDNO sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-RELTYPE sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-ORDNO sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-ITEMNO sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-LOGSY sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-MATID sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-LOCIDFR sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-LOCIDTO sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-CONFNO sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-CC_DATE sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-GI_TIME sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-GR_TIME sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-MAX_QUAN sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-ASSGN_QUAN sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-BASE_UOM sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-FLAG_USED sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-DATI_REC_CHNG sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-FLAG_REC_DELE sy-vline 
WA_/SAPAPO/LIMFIRMR_STR-DISP_REC_USER sy-vline      INTO ld_text SEPARATED BY SPACE.

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