ABAP Select data from SAP table REIS_MM_L into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REIS_MM_L
*  INTO TABLE @DATA(IT_REIS_MM_L2).
*--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_REIS_MM_L INDEX 1 INTO DATA(WA_REIS_MM_L2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REIS_MM_L>-MANDT = 1.
<REIS_MM_L>-INTRENO = 1.
<REIS_MM_L>-MANDATEID = 1.
<REIS_MM_L>-OBJNR = 1.
<REIS_MM_L>-CREATIONTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REIS_MM_L-RERF, sy-vline,
  WA_REIS_MM_L-DERF, sy-vline,
  WA_REIS_MM_L-TERF, sy-vline,
  WA_REIS_MM_L-REHER, sy-vline,
  WA_REIS_MM_L-RBEAR, sy-vline,
  WA_REIS_MM_L-DBEAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REIS_MM_L 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_REIS_MM_L 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_REIS_MM_L INTO WA_REIS_MM_L.


*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 REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_REIS_MM_L-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_MM_L-VALIDTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GEN_PARTNER1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REIS_MM_L-GEN_PARTNER1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_MM_L-GEN_PARTNER1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GEN_PARTNER2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REIS_MM_L-GEN_PARTNER2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_MM_L-GEN_PARTNER2.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit SXIDN, internal->external for field ISSMTP_ADDR
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_REIS_MM_L-ISSMTP_ADDR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_MM_L-ISSMTP_ADDR.
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_REIS_MM_L_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
MANDATEID TYPE STRING,
OBJNR TYPE STRING,
CREATIONTYPE TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
RBEAR TYPE STRING,
DBEAR TYPE STRING,
TBEAR TYPE STRING,
RBHER TYPE STRING,
RESPONSIBLE TYPE STRING,
USEREXCLUSIVE TYPE STRING,
AUTHGRP TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
MANDATETYPE TYPE STRING,
XMANDATE TYPE STRING,
CCREF TYPE STRING,
CCMNG TYPE STRING,
CCCR TYPE STRING,
STCEG TYPE STRING,
MANDATEOLD TYPE STRING,
MNACTIVATED TYPE STRING,
HASTAXDIST TYPE STRING,
BEHAVIOURMNGM TYPE STRING,
PLANTREF TYPE STRING,
PLANTMN TYPE STRING,
SEPA_REC_CRDID TYPE STRING,
VALIDITY TYPE STRING,
XAUTHGRP TYPE STRING,
MANDATECCEXISTS TYPE STRING,
XCCREF TYPE STRING,
CCREFCA TYPE STRING,
XCCREFCA TYPE STRING,
XCCMNG TYPE STRING,
XCCCR TYPE STRING,
PLANTMNEXISTS TYPE STRING,
XPLANTREF TYPE STRING,
XPLANTMN TYPE STRING,
STREET TYPE STRING,
HOUSE_NUM1 TYPE STRING,
POST_CODE1 TYPE STRING,
CITY1 TYPE STRING,
COUNTRY TYPE STRING,
REGION TYPE STRING,
RECISVALIDFROM TYPE STRING,
RECISVALIDTO TYPE STRING,
GEN_OBJTYPE TYPE STRING,
GEN_OBJNR TYPE STRING,
GEN_CONTRACT TYPE STRING,
GEN_PARTNER1 TYPE STRING,
GEN_PARTNER2 TYPE STRING,
ALVROWS TYPE STRING,
XADDRESS TYPE STRING,
ISROLE TYPE STRING,
ISXROLE TYPE STRING,
ISPARTNER TYPE STRING,
ISXPARTNER TYPE STRING,
ISTEL_NUMBER_LONG TYPE STRING,
ISFAX_NUMBER_LONG TYPE STRING,
ISSMTP_ADDR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REIS_MM_L_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_REIS_MM_L_STR-MANDT sy-vline 
WA_REIS_MM_L_STR-INTRENO sy-vline 
WA_REIS_MM_L_STR-MANDATEID sy-vline 
WA_REIS_MM_L_STR-OBJNR sy-vline 
WA_REIS_MM_L_STR-CREATIONTYPE sy-vline 
WA_REIS_MM_L_STR-RERF sy-vline 
WA_REIS_MM_L_STR-DERF sy-vline 
WA_REIS_MM_L_STR-TERF sy-vline 
WA_REIS_MM_L_STR-REHER sy-vline 
WA_REIS_MM_L_STR-RBEAR sy-vline 
WA_REIS_MM_L_STR-DBEAR sy-vline 
WA_REIS_MM_L_STR-TBEAR sy-vline 
WA_REIS_MM_L_STR-RBHER sy-vline 
WA_REIS_MM_L_STR-RESPONSIBLE sy-vline 
WA_REIS_MM_L_STR-USEREXCLUSIVE sy-vline 
WA_REIS_MM_L_STR-AUTHGRP sy-vline 
WA_REIS_MM_L_STR-VALIDFROM sy-vline 
WA_REIS_MM_L_STR-VALIDTO sy-vline 
WA_REIS_MM_L_STR-MANDATETYPE sy-vline 
WA_REIS_MM_L_STR-XMANDATE sy-vline 
WA_REIS_MM_L_STR-CCREF sy-vline 
WA_REIS_MM_L_STR-CCMNG sy-vline 
WA_REIS_MM_L_STR-CCCR sy-vline 
WA_REIS_MM_L_STR-STCEG sy-vline 
WA_REIS_MM_L_STR-MANDATEOLD sy-vline 
WA_REIS_MM_L_STR-MNACTIVATED sy-vline 
WA_REIS_MM_L_STR-HASTAXDIST sy-vline 
WA_REIS_MM_L_STR-BEHAVIOURMNGM sy-vline 
WA_REIS_MM_L_STR-PLANTREF sy-vline 
WA_REIS_MM_L_STR-PLANTMN sy-vline 
WA_REIS_MM_L_STR-SEPA_REC_CRDID sy-vline 
WA_REIS_MM_L_STR-VALIDITY sy-vline 
WA_REIS_MM_L_STR-XAUTHGRP sy-vline 
WA_REIS_MM_L_STR-MANDATECCEXISTS sy-vline 
WA_REIS_MM_L_STR-XCCREF sy-vline 
WA_REIS_MM_L_STR-CCREFCA sy-vline 
WA_REIS_MM_L_STR-XCCREFCA sy-vline 
WA_REIS_MM_L_STR-XCCMNG sy-vline 
WA_REIS_MM_L_STR-XCCCR sy-vline 
WA_REIS_MM_L_STR-PLANTMNEXISTS sy-vline 
WA_REIS_MM_L_STR-XPLANTREF sy-vline 
WA_REIS_MM_L_STR-XPLANTMN sy-vline 
WA_REIS_MM_L_STR-STREET sy-vline 
WA_REIS_MM_L_STR-HOUSE_NUM1 sy-vline 
WA_REIS_MM_L_STR-POST_CODE1 sy-vline 
WA_REIS_MM_L_STR-CITY1 sy-vline 
WA_REIS_MM_L_STR-COUNTRY sy-vline 
WA_REIS_MM_L_STR-REGION sy-vline 
WA_REIS_MM_L_STR-RECISVALIDFROM sy-vline 
WA_REIS_MM_L_STR-RECISVALIDTO sy-vline 
WA_REIS_MM_L_STR-GEN_OBJTYPE sy-vline 
WA_REIS_MM_L_STR-GEN_OBJNR sy-vline 
WA_REIS_MM_L_STR-GEN_CONTRACT sy-vline 
WA_REIS_MM_L_STR-GEN_PARTNER1 sy-vline 
WA_REIS_MM_L_STR-GEN_PARTNER2 sy-vline 
WA_REIS_MM_L_STR-ALVROWS sy-vline 
WA_REIS_MM_L_STR-XADDRESS sy-vline 
WA_REIS_MM_L_STR-ISROLE sy-vline 
WA_REIS_MM_L_STR-ISXROLE sy-vline 
WA_REIS_MM_L_STR-ISPARTNER sy-vline 
WA_REIS_MM_L_STR-ISXPARTNER sy-vline 
WA_REIS_MM_L_STR-ISTEL_NUMBER_LONG sy-vline 
WA_REIS_MM_L_STR-ISFAX_NUMBER_LONG sy-vline 
WA_REIS_MM_L_STR-ISSMTP_ADDR sy-vline      INTO ld_text SEPARATED BY SPACE.

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